Spent A Long Time On This Art Resource/reference Masterpost! Finally Starting To Edit To Add More. This

my color tips pdf is now available ! i had a lot of fun with this, i hope you enjoy ^^

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While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity. This is not because the mass pulls on the photons directly, but instead because the mass warps the space-time through which the photons travel. Imagine a bowling ball on a mattress. The ball is a massive object — say, the Sun — and the mattress represents space-time, in which it sits. (Of course, space-time is four-dimensional, but it’s a bit harder to imagine that!) When you place the bowling ball on the mattress, it deforms the surface. If a grid were drawn on the mattress, you would see the grid deform, so the straight lines of the boxes were no longer straight. The same is true for a star sitting in space-time — the star deforms space-time around it, causing it to curve toward the star. Now imagine a marble; this represents a photon. If you roll the marble in a straight line on the mattress and it comes too close to the bowling ball, the marble will curve because the mattress it’s traveling on dips and curves around the bowling ball. This is what happens to light traveling through space: When it comes too close to a massive object, it encounters warped space-time and curves not because it’s being pulled by gravity, but because the space-time it’s traveling through is curved, so its “straight” path becomes a curved, bent one.

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some vaguely coherent notes on owl facial discs because they were the hardest part of the bird for me to figure out and if this helps at least one person then I consider that an epic win

Photos: Barn Owl, Long-eared Owl

Meet NGC 2841

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 – 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 Hubble’s 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

Did you know? There are about 300 species of sea pens that can be found swaying on the ocean floor around the world.🪶

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

Ice age children frolicked in 'giant sloth puddles' 11,000 years ago, footprints reveal

More than 11,000 years ago, young children trekking with their families through what is now White Sands National Park in New Mexico discovered the stuff of childhood dreams: muddy puddles made from the footprints of a giant ground sloth.

Few things are more enticing to a youngster than a muddy puddle. The children — likely four in all — raced and splashed through the soppy sloth trackway, leaving their own footprints stamped in the playa — a dried up lake bed. Those footprints were preserved over millennia, leaving evidence of this prehistoric caper, new research finds.

The finding shows that children living in North America during the Pleistocene epoch (2.6 million to 11,700 years ago) liked a good splash. “All kids like to play with muddy puddles, which is essentially what it is,” Matthew Bennett, a professor of environmental and geographical sciences at Bournemouth University in the U.K. who is studying the trackway, told Live Science. Read more.

The Sun is White, not Yellow.

Random Fact #3,517

A lightning spark can reach over 8 kilometres in length.

The Earliest Galaxy

Astronomers think they have found a galaxy that existed just 300 million years after the big bang. The galaxy named HD1 is so old, it likely only exists of what are known as population iii stars, the very first stars that ever came into existence, made of mostly hydrogen, helium and a small amount of beryllium and lithium.

We have never seen any population iii stars, and according to the theories of the early universe, most of these stars would have been colossal blue giant stars that wouldn't have lived very long at all, a few million years at most before going supernova and collapsing into black holes.

One thing that really stands out about this galaxy is it's unusually powerful in ultra violet light, a common feature of massive blue giant stars, but the amount seen in this galaxy may indicate the presence of a supermassive black hole behaving as a quasar, if this is correct, it will be the earliest example of a blackhole too.

If supermassive black holes were present just 300 million years after the big bang, it may be evidence that black holes were being created much earlier than previously thought.

The next step is to turn the James Webb Telescope towards it, and while it is more focused on the Infra Red, it will be able to resolve much more detail than Hubble, and maybe begin to see if indeed, this was a Qasar just 300 million years into the Universe's existence, or if the galaxy was producing far more stars than even the most prolific starburst galaxy would do today.

Source : https://astronomy.com/news/2022/04/researchers-discover-the-most-distant-galaxy-yet

Gabriella Mistral nebula by AstroCapetown