I just reblog fun facts/tipsScience, nature, geology facts etc! + art & writing tips!
67 posts
also known as RAFGL 2688 and CRL 2688, the Egg Nebula is located 3000 light years from Earth in the constellation of Cygnus.
The nebula is a bi-polar proto-planetary nebula, or essentially a star in the dying days of it's existence starting to throw out shells of atmosphere as it moves towards being a white dwarf.
The central star is concealed by an area of dust with the light poking out in areas where the dust is lightest, this is thought to be an accretion disk around the star.
Did you know? There are about 300 species of sea pens that can be found swaying on the ocean floor around the world.đȘ¶
You might be surprised to find out that this feather-like structure is actually a colony of polyps that work together to survive. Different polyps have different responsibilities depending on their location on the body. There are feeding polyps that catch plankton, as well as polyps that circulate water to keep the colony balanced and upright.
Photo: Richard Ling, CC BY-NC-ND 2.0, flickr; kidney sea pens (Sarcoptilus grandis) pictured
#AnimalFacts #OceanLife #SeaPen #Ocean #nature #fish #dyk #MarineLife #MarineBiology https://www.instagram.com/p/Cb_UKlsLemR/?utm_medium=tumblr
Location: In the constellation Ursa Major
Type: Flocculent spiral galaxy
Discovered by: William Herschel
NGC 2841 is a beautiful example of a flocculent spiral galaxy â a type with discontinuous, featherlike, and patchy arms. A bright cusp of starlight distinguishes the galaxy's center from the dust lanes that outline the group of almost white middle-aged stars. The far younger blue stars trace the spiral arms.
Find out more information about NGC 2841 here.
Right now, the Hubble Space Telescope is exploring #GalaxiesGalore! Find more galaxy content and spectacular new images by following along on Hubbleâs Twitter, Facebook, and Instagram.
Credit: NASA, ESA, and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration; Acknowledgment: M. Crockett and S. Kaviraj (Oxford University, UK), R. O'Connell (University of Virginia), B. Whitmore (STScI), and the WFC3 Scientific Oversight Committee
Hey Anon! First of all Iâm very honored, thanks a lot!!
Youâre asking a very interesting question in my opinion, so I hope you will find a long response interesting as well c:
When I want to learn how to draw a new Monster, I base myself on the Monsterâs design (ofc) but also on general knowledge, especially anatomy. Anatomy is crucially important even when drawing creatures that do not exist, simply in order to make them believable!
So if you struggle to draw MH Monsters, that are famous for their ârealismâ and believability, first ask yourself what level you have in basic anatomy: if you know how skeleton works, muscles work, transcribing it into proportions and joints, things like that.
(Art I made for fun for my RP blog)
I sadly canât offer you much advice on how to learn it, because anatomy is partly intuitive to me; and lots of my artistic anatomy studies were more centered around human anatomy (however, a lot of muscle groups are similar to animals, so even my knowledge of humans is useful when drawing monsters). I also have to mention Iâm a vet student, and we had medical anatomy classes in the first year, which helped a lot as well; but Iâm sure you can find online resources that will teach you the basics for art!
Keep reading
Part 2 of cino art tips is some basic tips on shape and silhouette design which are also principles I think about a lot :)
(also i'm so sorry i chose comic sans to write this in idk what i was thinking but i already flattened the layers)
i don't have any other obvious tips off the top of my head rn but feel free to ask anything you are curious about! i love getting asks uwu
Your art is amazing!!! I love the stunning use of colour! Do you have a process to pic colours or just mess with them until you get something you like? :)
Thank you, youâre so sweet!! When I draw my own characters I just pick colors I like but for fanart thereâs a few things I do. Iâll share my process here in hopes it might help!
When working with vibrant colors I like to soften them by warming them up, making them similar to each other, and avoiding pure colors altogether. Our eyes are sensitive so I never want my colors to be too bright or contrasting.
Tertiary colors are more unique and calming than primary colors so I use them a lot to punch up my art without making things too intense. It also puts a fun twist on designs when we use colors that are close but not exactly like the originals.
Balancing colors is so important! Itâs my final step to completing every color palette I make. There has to be a variety, contrast, and a connection between colors. Adding a little of the same color to all of the others helps to accomplish this. Usually I take a shortcut by adding a color overlay in my painting programs. This is also another reason why I never use pure white or black---those colors will not be affected by color overlays.
Thereâs also my color post here if anyone wants to know more about color theory and things. Color is a huge deal but itâs really fun!
Some tips and tricks for getting glowy, beautiful, vibrant lighting effectsâŠespecially in traditional art, with no ctrl+z! The example piece is a watercolor work in progress of mine and, if youâre familiar with watercolor, you know itâs super unforgiving. What you put down stays!
Do a very loose, messy sketch of your illustration. This helps define the composition, but it can also help you pick where your light is coming from and what colors youâll use for it. This way, you can reference the light source and colors while youâre painting!
Even if youâre working digitally, this creates a great color key you can turn back to. You can make a thumbnail digitally or traditionally.Â
This thumbnail only took about 20 minutesâŠand itâs saved so many headaches during the painting process.Â
When you have a thumbnail, the rest of your painting is just a translation of those colors with a better technique.Â
Tips:
Feel free to make many thumbnails! This is the easiest step to revise and repeat.
Use a photo for inspiration for your color scheme. I used clouds in the evening as color references.Â
Play around with layers and effects (like overlay, multiply). This can help you figure out new colors that you can then try to capture traditionally!
Line art is important for gradients! I did mine first, so I had to consider the glow effect too. Itâs a bit blurry (as its a screenshot from a reel, lol), but you can see yellows to dark browns and blacks. This established the glow from the start!
Tips:
Consider using a media you can get gradients in. I used acryla gouache here, but ink, watercolor, and even markers can work well!Â
If itâs hard to visualize highlights in line art, do the lines after with pen or paint! Adding shadows and highlights that way can be easier.Â
Once you have your sketch on paper finished, start with large gradients! This helps define your light source and keep your whole composition making sense.Â
Here, I started with the background sky, then added in the shadow coming off the wing before doing anything else. Take note of how helpful the thumbnail was in helping me lay this all out, too!
See how both the hair and wings move from warm (yellow/browns) to cool colors (blues, payneâs grey)? This is a surefire way to keep the strong light source and make it look like the light is glowing!
Tips:
This is all about keeping the colors close to your light source, so if your light source is cool (like the moon), your highlights are cool and your shadows are warm tones. The key is just to keep it consistent!Â
Lighting isnât just light to dark gradients. Itâs also warm to cool/cool to warm!
Think about all the spots the light catches (like that one front feather on the left top). It takes a lot of thinking through, but itâll make a huge impact! (Remember, you can always revisit your thumbnail or add more details in there)
Donât forget about reflected light, bouncing off another surface. Itâll be more subtle than the main light source, but still there!
Final Tips:
Love those gradients! Watercolor is meant for beautiful gradients, so use multiple colors for a glow. The feathers in the light go from yellow ochre to prussian blue to payneâs grey.
Start with the highlights first, then work into the shadows! Above, the skin isnât even painted with shadows yet, because I wanted to get the lighting first.
This is just a WIP right now, but I hope these tips help! If you want to follow, Iâll be posting more progress pics (and the finished illustration soon too). :D
Spent a long time on this art resource/reference masterpost! Finally starting to edit to add more. This will be REGULARLY updated so itâs gonna get huge. If you have a request for resources for me to find OR have a resource you want me to add, just send me an ask :D
General Anatomy/Human stuff:
body quick tips
painting/drawing straight hair
how to draw eyes
arm squish/bend tip
chest/pecks with raised arms tip
long hair how to
male torso anatomy (back)
learn manga male anatomy (torso & arm)
male torso anatomy (front)
head and hair tips (scroll  a bit, itâs in one of the images!)
how to draw noses
ears tilty tip
arm tips
two tips for drawing womenâs hair
drawing teeth
anatomy tips
random hair and mouth ref anime
leg muscle anatomy ref
arm muscles anatomy ref
knees reference
arm ref study
quick arm tut tip
how to draw arm
shoulders n sleeves
Poses:
umbrella poses
random female poses
random anatomy pose thing
chibi sleeping in hands pose
laying poses
elf (?) with staff poses
holding phone half bod
peeny wolf pose set
perspective pose sheet
anatomy posesÂ
crossed arms ref sheet
holding baby poses
Hands:
how to draw hands 1
hand refs & tutorial 2
hand tutorial 3
hand tutorial 4
36 hands
how to draw hands in 10 minutes
hands ref 2
hand gestures and simplifying the hand
arm & hand ref
500 hands
Diversity:
stop drawing natives red
wheelchair tutorial
drawing fat people
vitiligo notes for artists
darkskin palms
epicanthic folds
biracial characters
doâs and donâts of thick lips
Animals/Creatures:
how to draw falcon beaks
canine studies (broken down into parts)
feline tiger ref
Insect wing venation
Musculature of a T-Rex
Pony bodies tutorial
Hyena Nose tutorial
horse reference
drawing horns
Flesh tutorial
bird tips
wing basics
making mythical creatures look realistic
pony heads tutorialÂ
dragon designing tutorial pt 3/3
pony wings tutorial
hedgie bodies
Furry/Anthro:
dogquestâs pixel tutorial
furry portrait tutorial
furry pants tutorial
how to draw paws/pawhands
fur direction reference
anthro tips
muzzle shapes
furry styles
anthro expressions
f2u chibi-ish furry base
furry / cartoon head tutorial
f2u furry base/pose w three different ears
drawing humans! for animal artists
Backgrounds:
how to draw debris
fire tutorial
night sky tutorial
materials study with notes
tree tutorial
water tutorial
tangents??
ocean painting
clouds tutorial
bubbles
painty background studies tips
peony tutorial
lakeside tutorial
quick flowers for the lazy
mistletoe vs holly
Perspective:
foreshortening coil technique
foreshortening tutorial
Webcomic:
medibang comic panel tutorial
how i make webcomics/webtoons
how to color comics
the art of lettering comics
comic/doujinshi paneling
in depth webcomic tutorial
Coloring:
The colorpicking problem
72 Color Combinations
How ViPOP uses color
Hair coloring tutorial by rosuuri
Gurochii moe quick eye tutorial
Anime eye tutorial
Mermaid tail tutorial
Grayscale to Color painting tutorial
chibi eye walkthrough
skin tone tutorial 1
curly hair tutorial
color palette
coloring tutorial
light, it gets everywhere
comfort color
skin coloring tutorial
holographic tutorial
dappled lighting effect
cute/bright coloring tutorialÂ
pattern trick
arcana character coloring tut
Expressions/ Meme / style:
small body language study
expressions reference
how to cute
Platonic cuddles meme
expression reference : nervous
flustered expression meme
drawing expressions tutorial/key
Pixel Art:
Pixel icon tutorial
Ice cream
Moving clouds tutorial
50x50 pixel doll tutorial
pixelinâs pixel process
pixel expression ref
pixel eye blinking tutorial
how to pixel liquids
Clothing / Accessories:
Shoes
Fancy color tip / ref
Chainmail
short reference
learn manga basic pleated skirt tutorial
learn manga basic frills
random clothing refs
chainmail brush
clothing ref masterpost
pinstripes tips
cloth texture tips
how to clothing folds
Misc:
Sketchfab 3d Models
Mikeymegamega on YT for anime/ecchi/etc
Gentei_sozai on twitter for chibi poses
S0zalsan on twitter for random poses
mecha basics
75 tutorials
Obvious art tips you might have forgotten
Mosaic effect
how to draw a cute chibi
fighting artblock
cute pikachu base
painting a face tutorial
volume commissions mini tutorial
arcana characters tutorial reference
notes from the âanimators survival kitâ
concept art tutorial
another art resource masterpost
MS paint tips and tricks
Reference table for drawing CONSISTENT faces
@hanari0716 on twitter for HELLA references
animation guide for beginners
Brushes:
Foliage brushes
cityscape brushes
ghibli brushes
clip studio paint assets
PS brush pack
hi my qualification for writing this guide to youtube art tutorials (though it may be applicable to other forms of media as well) is that i have watched over (roughly) 200 art tutorials of various length, artistry, content, style, and more
when weâre told âlook up guides onlineâ thereâs not really much more to say on how to approach our research and taking them in, so if youâre a little lost in the vast sea of art help like i was as a wee bab, then this may help!
donât feel bad for skipping - if something isnât striking you as informative or helpful, donât feel bad for moving right along and treating it like a sponsor
^ also applies for lengthy talking or deriving from the point, if youâre not up for it. you donât need to sit through the artistsâ whole spiel to learn how to draw hands.
if something isnât making sense, reach out to communities for help, and go beyond youtube/tumblr. reddit and discord servers are also full of places to go to talk to more ppl
trust your gut! if someoneâs style makes you go âhmm this feels wrong and objectifyingâ, itâs because it is - feel free to move right along
^ also applies for if it feels like the artist is just showing off and not explaining enough, or just posting for ego boost or to get coin.
⊠related tip but if an artist likes to rant about discourse as the primary thing on their channel, i know drama can be fun and juicy but please just avoid these people, because generally theyâre either nasty and toxic-minded, or they seem to have some bs going on for them in the background
check out comments and online discussion to see how well received a popular artist is, and pay attention to their discourse to avoid any mistakes they unintentionally or even proudly display
the art program is not important!!! every art program has some level of similar functionality, some with more bells and whistles than others, and very rarely does one program lack a key tool the others donât have. the hardest part is translating what your artist means when they say one thing but your program has another - but more often than not, some similar wording or like words are used for the same tool or setting.
^ this means you can watch that tutorial on how to draw legs for clip studio if all you have is firealpaca
Information over Entertainment! the best artists to find help in are ones who focus primarily on relaying information and less on colorful quirky editing - those kinds CAN be helpful, but in general i tend to find more useful tips in videos that feel more academic as opposed to more entertaining.
donât feel bad for flatout ignoring advice. if you found something that works better for you, please use it. feel free to try new techniques as well if youâre feeling stuck or want a change of pace!
What words should you use when finding the right video? Think like a content creator, here. General words are best when searching for the right video, and in order to think of those words, you need to know the parts of art. Lines, anatomy, colors, values, background, perspective, etc - figure out which part or parts you struggle with, and use one term at a time.
What types of videos are for me? If you are a Fresh Brand New Baby Beginner Artist that doesnât even know much about art letalone art programs, then stick to tutorials that are labelled âfor beginnersâ. If you know your way around an art program but youâre still pretty new, then your average art tutorial should be most helpful. More entertaining artists should be ok to start with! If you know your way around art but not programs, look for âart program reviewsâ, then once youâve picked one or a few to mess around with (though I really recommend one at a time), look for â(program name) intro to / introductoryâ. And if you are well aware of everything Iâve listed, then youâll be needing âintermediary / intermediateâ tutorials. These ones are best given by master artists who focus on academic presentation. If youâre a master, you donât even need this tumblr post wyd đ
ditch lineart for a bit (this way its easier to part with things that arenât working)
use a REALLY thin brush
copy, copy, copy art you think is âšart goalsâš
donât post that stuff tho :O
if you need to trace at first, thats fine lol but break away from that eventually!! you gotta train your eyes to draw what you see, spatial awareness is very important
copy hands, poses, expressions, anything you wanna get better at
donât copy from refs that are way too simple to be used as a âmaster studyâ, like from the calarts shows etc.
copy from stuff thats kinda complex bc if you learn how to draw it in that complex way, you can always simplify it if you want ^^
im pretty sure this is how many of us have become obsessed with hip dips details LOL
if something looks off, flip ur canvas, mess with ur sketch, or even delete (or hide) parts of the sketch and try again. if you drew it once, u can draw it again. (erase or hold up the page to the light backwards if drawing on paper)
being cool with parting with your sketch if its not working will make you a better artist
youre allowed to frankenstein refs together lol (a hand from here, a mouth from thereâŠ)
if youre having trouble making your sketches look like theres actual shapes, try shading :D
literally the only reason i shade now is to show the shapes of objects in more of a painterly way (its not just for paintings btw, its just easier to describe it that way)
try new things that youre excited about like perspective, anatomy, blah blah
copy!!!! while youre copying itâs gonna be cool to see how much you remember when you try it on your own
scribble a doodle as often as you can, not like urgently, but like as something to look forward to (like how lots of ppl look forward to wordle everyday lol)
this list can apply to anyone but its fine if you wanna take some advice and leave some if it doesnât work out. this list is mostly just to get you comfortable with sketching and learning, not performing.
I mention that ânot performingâ thing bc its easy to want to please social media platforms because that attention and validation can feel amazing!Â
but its also addicting because many of us crave being in a community and talking to ppl who like the same things we do
there are many communities out there from artist youtubers, artist streamers, etc. and many of them have discords and stuff and it might be fun to join! and/or join fandom ones if u want ^^Â
that way you have something thats not bound by if ig decides to not show your post to your followers or something
thereâs also lots of other platforms that arenât social media based specifically for artist communities too!
with this said, please be safe! never give out private info and youâre always free to block/report ppl who make u uncomfortable or ask weird things.Â
on the topic of being in communities⊠reblog art you like! comment the nice things youre thinking in the tags or in an actual comment! share art you like on your ig story!
firstly, this is great for making friends
secondly, the artist cant read ur mind so they donât hear anything nice youre saying :(
comments can be so motivating!! hearing nice things from my mutuals about my art feels great bc of that authentic human connection weâve all been missing for like 2 years now
if i see a mutual drawing something and i think âomg they did amazing with the expression!â i write it (ive also been told i leave comments as if im talking and its kinda funny to read sometimes xD)
its channeling âgirls support girlsâ culture in a way lol weâre our best when weâre lifting each other up <3
luv ya, be safe!! and draw lots of things!! :D
add stuff thatâs helped you improve kinda fast if u want too! if we put all our brain cells together weâll be unstoppable heheh
Some people asked how I paint hair, so I made this very simplified explanation, but I hope it helps someone.
The @ is my twitter btw ^~
did a quick colouring tutorial for someone so dropping it here
The objective of this observation is to examine thin layers in the Nepenthes Mensae region. Because this location is close to Gale Crater, these layers may one day be compared to those currently being studied by the Curiosity rover. This scene was also imaged by the Context Camera onboard MRO.
Nepenthes Mensae is a plateau, whose name derives from Greek for a drug that quells all sorrows with forgetfulness. âNepentheâ literally means âwithout griefâ (ne = not, penthos = grief) and was a potion given to Helen by an Egyptian queen in Homerâs âOdyssey.â
Enhanced color image is less than 1 km across; black and white is less than 5 km.
ID: ESP_055565_1750 date: 4 June 2018 altitude: 265 km
NASA/JPL-Caltech/UArizona
The wind on Neptune can blow at speeds of 2,000 km/hour.
The winds causing the Great Dark Spot specifically have been measured to be around 1,127 km/hour.
Herschelâs view of new stars and molecular clouds by europeanspaceagency
Symmetry Magazine
How JWST will test models of cold dark matter
By Madeleine OâKeefe
Two projects in JWSTâs first observation cycle will probe the nature of dark matter.
On Christmas morning of 2021, an Ariane 5 CEA rocket blasted off from Kourou, French Guinea. It carried with it the largest and most sophisticated space telescope ever built: the James Webb Space Telescope.
Since then, JWST has reached its orbit about 1 million miles from Earth, unfurled its tennis-court-sized sunshield, and aligned its 18 hexagonal mirror segments. The telescopeâs first images are expected by summer.
Over the next decade, JWST will make cutting-edge observations to help scientists answer myriad outstanding questions in astronomyâincluding questions about the nature of dark matter.
Hot, warm or cold Dark matter is an enigmatic substance that scientists believe accounts for 85% of matter in the universe. But so far it has not been observed directly; scientists can infer dark matterâs presence only by observing its gravitational effects on normal matter.
Different theories posit different types of dark-matter particles. Dark-matter candidates considered âhotâ or âwarmâ are particles that would have moved so quickly in the early universe that gravity would not have been able to confine them. On the other hand, dark-matter candidates considered âcoldâ are thought to have moved so slowly that gravity would have formed them into small dark-matter structures that eventually would have coalesced into larger, âclumpyâ ones.
âDecadesâ worth of computer simulations have tested how structure forms and grows under the hypothesis of cold dark matter,â says Matthew Walker, an associate professor of physics at Carnegie Mellon University.
Cold dark-matter simulations show dark matter clumping into small blobs, which encounter other blobs and merge together, continually snowballing until large structures like the Milky Way are formed. These gravitationally bound blobs of dark matter are known as halos.
JWST can see your halo Anna Nierenberg, assistant professor of physics at University of California, Merced, was awarded 39 hours of observing time during JWSTâs Cycle 1 to look for small dark-matter halos.
Many models, including the baseline dark-matter model, predict the existence of small (107 solar mass) halos that do not actually contain galaxies. Such a halo would âjust be a blob of dark matterâ with no stars inside it, Nierenberg says.
If there are no stars within these blobs of invisible material, how can we even try to detect them? Nierenberg and her team of nearly 20 scientists in the US, Canada, the United Kingdom, Switzerland, Spain, Belgium and Chile are using a phenomenon called gravitational lensing.
Born of Albert Einsteinâs theory of general relativity, gravitational lensing says that matter bends spacetime and, subsequently, any light that encounters it. If light from a distant source travels through the universe toward Earth and passes by a massive objectâsuch as a blob of dark matterâthe light will be warped around it. If the in-between object is massive enough, the light is deflected in such a way that weâll see up to four images of the light source appearing around the mass.
Nierenbergâs group will measure the number of small dark-matter halos by observing a sample of quasars (supermassive black holes at cosmological distances surrounded by dusty accretion disks) that have been gravitationally lensed. Detecting small halos would be a triumph for the cold dark-matter theory; conversely, not detecting small halos would imply that cold dark matter does not exist.
Because the light from these quasars must travel a great distance in an ever-expanding universe, it is stretched along the way, pulling its wavelengths into the infrared range. The mid-infrared wavelengths they are observing are almost impossible to see with ground-based telescopes. âWeâre going to be observing with absolute reddest bands that JWST can accommodate,â Nierenberg says.
These wavelengths cannot be observed by the Hubble Space Telescope, which studies gravitational lensing at visible wavelengths. And older space-based telescopes that can see in the mid-infrared donât have the resolution to separate the different lenses. Making these observations in mid-IR requires the high spatial resolution that only the JWST can provide, Nierenberg says.
Daniel Gilman, a postdoc at the University of Toronto and one of Nierenbergâs co-investigators, says, âThe kind of data that we can get with JWST is unique and much more powerful or constraining than the kind of data that we could get with Hubble or from the ground.â
Nierenberg says, âI really believe that this is going to be a huge scientific step forward.â
Looking far and wide Walker is leading another dark-matter project in JWSTâs Cycle 1, but his group didnât apply for observing time. Instead, they are using data that JWST is collecting for other programs.
Walkerâs groupâs âarchival researchâ is looking inside dwarf galaxies to find wide binary stars, systems of two stars orbiting each other at relatively large distances (on the order of one parsec, slightly less than the distance between the sun and our closest neighbor, Proxima Centauri).
âBecause [wide binary stars] are so far apart, theyâre very fragile systems,â says Walker. âIf, say, a little dark-matter halo were to fly past a wide binary-star system, it could exchange energy with either or both of the stars in that system. And it just takes a small fraction of a fraction of a percent increase in the energy of either star to rip the pair apart.â
If Walkerâs team finds wide binary stars, âwe can be reasonably confident that those sub-galactic cold dark matter halos donât exist,â he says. âAnd that, then, would be a real problem for the cold dark-matter model in general.â
Thatâs what Katharine Lee, a junior physics major at Carnegie Mellon in Walkerâs group, likes about the project. âI particularly think this research is really interesting because the current framework for what we think of as the structure of dark matter is the cold dark-matter model, and the research that Professor Walkerâs doing could potentially invalidate that.â
If the group did not find wide binary stars, it could be a sign that they were destroyed by dark matter. But it would not prove that they were destroyedâthey may just have never formed in these dwarf galaxies in the first place.
Walker says that JWST is an ideal tool for this search because of its âexquisite sensitivity to faint objects,â as well as the telescopeâs abilities to take high-quality images and distinguish pairs of sources at very small separations. And thanks to its 21-foot-diameter primary mirror, JWST will see farther than any other telescope ever built.
âI think JWST is going to give us a new and really powerful angle,â says Jorge Peñarrubia, a professor at the University of Edinburgh and one of Walkerâs co-investigators. âBut even if that fails, weâll find other ways.â
Indeed, there are many other techniques that scientists use to search for dark matter, including direct searches by physics experiments. And both Nierenberg and Walker are using gravitational lensing and wide binary-star methods on data from the Hubble Space Telescope while they wait for JWST to open its eyes.
Future JWST science programs might further explore the mysteries of dark matter, whether through gravitational lensing or perhaps by observing statistics of galaxy evolution that scientists can then compare to dark-matter theories.
âWe donât lack theories of what dark matter could be. There are a lot of them,â Gilman says. âWhat we lack are observations that wield a lot of constraining power over these theories. And thatâs something that JWST is going to give us.â
Illustration by Sandbox Studio, Chicago with Olena Shmahalo
a friend of mine was having trouble with a character of hers, he was middle-aged but looked too young, so she came to me for help. i'm something of a middle-aged-man-fan so i whipped up this quick thing to help her out. it might be useful to somebody out there so i'll share it here too!
Although actively-forming gullies are common in the middle latitudes of Mars, there are also pristine-looking gullies in equatorial regions.
In this scene, the gullies have very sharp channels and different colors where the gullies have eroded and deposited material. Over time, the topography becomes smoothed over and the color variations disappear, unless there is recent activity.
Changes have not been visible here from before-and-after images, and maybe such differences are apparent compared to older images, but nobody has done a careful comparison. What may be needed to see subtle changes is a new image that matches the lighting conditions of an older one. Equatorial gully activity is probably much less commonâperhaps there is major downslope avalanching every few centuriesâso we need to be lucky to see changes.
MRO has now been imaging Mars for over 16 years, and the chance of seeing rare activity increases as the time interval widens between repeat images.
Enhanced color image is less than 1 km across.
ID: ESP_072612_1685 date: 22 January 2022 altitude: 263 km
NASA/JPL-Caltech/UArizona
A friend of mine shared this fantastic resource over Discord, so did a few studies in-between working on homework!
Stars and Dust Across Corona Australis : Cosmic dust clouds cross a rich field of stars in this telescopic vista near the northern boundary of Corona Australis, the Southern Crown. Less than 500 light-years away the dust clouds effectively block light from more distant background stars in the Milky Way. Top to bottom the frame spans about 2 degrees or over 15 light-years at the cloudsâ estimated distance. At top right is a group of lovely reflection nebulae cataloged as NGC 6726, 6727, 6729, and IC 4812. A characteristic blue color is produced as light from hot stars is reflected by the cosmic dust. The dust also obscures from view stars in the region still in the process of formation. Just above the bluish reflection nebulae a smaller NGC 6729 surrounds young variable star R Coronae Australis. To its right are telltale reddish arcs and loops identified as Herbig Haro objects associated with energetic newborn stars. Magnificent globular star cluster NGC 6723 is at bottom left in the frame. Though NGC 6723 appears to be part of the group, its ancient stars actually lie nearly 30,000 light-years away, far beyond the young stars of the Corona Australis dust clouds. via NASA
IC 342: Hidden Galaxy
"IC 342 is a challenging cosmic target. Although it is bright, the galaxy sits near the equator of the Milky Wayâs galactic disk, where the sky is thick with glowing cosmic gas, bright stars, and dark, obscuring dust. In order for astronomers to see the intricate spiral structure of IC 342, they must gaze through a large amount of material contained within our own galaxy â no easy feat! As a result IC 342 is relatively difficult to spot and image, giving rise to its intriguing nickname: the âHidden Galaxy.â Located very close (in astronomical terms) to the Milky Way, this sweeping spiral galaxy would be among the brightest in the sky were it not for its dust-obscured location. The galaxy is very active, as indicated by the range of colors visible in this NASA/ESA Hubble Space Telescope image, depicting the very central region of the galaxy. A beautiful mixture of hot, blue star-forming regions, redder, cooler regions of gas, and dark lanes of opaque dust can be seen, all swirling together around a bright core. In 2003, astronomers confirmed this core to be a specific type of central region known as an HII nucleus â a name that indicates the presence of ionized hydrogen â that is likely to be creating many hot new stars."
Image and information from NASA.
Your writing will always feel awkward to you, because you wrote it.
Your plot twists will always feel predictable, because you created them.
Your stories will always feel a bit boring to you, because you read them a million times.
They won't feel like that for your reader.