The Hubble telescope has captured an image of an unusual edge-on galaxy, revealing remarkable details of its warped dusty disk and showing how colliding galaxies spawn the formation of new generations of stars. The dust and spiral arms of normal spiral galaxies, like our own Milky Way, appear flat when viewed edge-on. This Hubble Heritage image of ESO 510-G13 shows a galaxy that, by contrast, has an unusual twisted disk structure, first seen in ground-based photographs.
Credit:
NASA/ESA and The Hubble Heritage Team (STScI/AURA)
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@forgetfulhippocampus and I had a photo shoot. Here’s some highlights.
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While Galaxies can come in all shapes and sizes, with a preference to Spiral and Elliptical, few come as interesting as ARP 174.
The designation ARP is the surname of Halton Arp, an American astronomer who in 1966 published The Atlas of Peculiar Galaxies, of which Mayall’s Object was the 174th in his catalogue.
Originally thought to be a galaxy reacting with a normally visible line of Hydrogen in Intergalactic space, it’s now considered to be two distinct galaxies in the throws of merger. As the elongated object made contact, the ring like structure of the other was formed by a shockwave of the event.
At 450 Million light years from Earth, we are seeing what happened almost half a billion years ago, and not what is there right now.
Many white dwarf stars have companion stars. What was once a binary pair of stars, one star exhausts its fuel and after being a red giant, sheds its outer shell and collapses into a white dwarf. Often the companion star is far enough away to not be a problem, but from time to time, they are close enough for an exchange of material, particularly if the partner star bloats to become a red giant. The white dwarf begins to snack on the material from the partner star.
Now, you’d imagine the white dwarf would then grow in size, but rather, it shrinks !
It’s not the size that denotes the amount of material, it’s the mass, and as the mass increases, so does the gravitational effect, and the matter is then crushed further down.
As the gravitational pull increases, it is possible that the now dead star can gain enough pressure at the centre to re-ignite fusion of carbon and oxygen, and it turns out that the mass required to do this, sits very close to the limit where neutron stars are formed. So suddenly a huge portion of the carbon and oxygen begins to fuse, and causes a huge explosion of energy. so much so, that most supernova explosions will output more energy in that one event, than our sun will in it’s entire 10 billion years of main sequence life.
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Body Neutrality for Females with Dysphoria:
Are you dysphoric? Are you sick of body positivity? Are you female? Here are some affirmations that you can try out to counteract your negative internal monologue.
Whenever you think a negative/dysphoric thought, tell yourself one of these affirmations. If it feels corny or dumb, that’s a good sign. It means you’re challenging your brain’s self-hatred. You are redirecting your brain and challenging your usual thought patterns.
General body:
My body allows me to perform the tasks I need to survive
My body is worthy of respect
This form is the product of years of human evolution
Uterus:
Thank you uterus, for providing structural integrity and support to my bladder, bowel, pelvic bones and organs
Period:
Cramps are temporary
Periods are a natural, normal biological function
Ovaries:
Thank you ovaries, for helping me regulate hormones and stay healthy
Feel free to add any that you come up with!
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“From Earth, these comets typically appear brightest during closest approach. Bright, naked-eye comets are rare, with 1997’s Hale-Bopp serving as our most recent “great comet.” Since then, only 2007’s Comet McNaught was comparable, primarily to southern hemisphere observers. But in July of 2020, Comet NEOWISE will put on Earth’s greatest cometary show in 13 years. With a 6,800 year orbital period, it last appeared before the wheel was invented. On July 3, 2020, it reached perihelion, surviving a perilous encounter with the Sun.”
Most potentially exciting comets fizzle rather than sizzle, but Comet NEOWISE is looking to be an exception. On July 3, it passed its closest to the Sun, surviving the encounter and brightening significantly. Very close to the Sun right now from our perspective, it’s just about to transition from a pre-dawn to a post-sunset comet. You can easily see it with binoculars if you know where to look (images in the article), but it will continue to brighten until July 23, 2020, where it just might become the most spectacular comet in more than a decade.
Comet NEOWISE is already here, and now begins your chance to see it, particularly if you live in the northern hemisphere. Get out there and look!