10. Hoag’s Object
When tasked with solving the problem of how Hoag’s object was formed, science came up with a resounding “what?” In the end, they just labeled it as a type of ring galaxy and moved on. Want an example of another galaxy of this type? Look just inside the top end of the ring. There’s one off in the distance, which is bizarre, since these kinds of galaxies are pretty rare.
09. Arp 87
These two galaxies almost ran into one another a few billion years ago and gravity has strung out material between the two as they moved apart. It’s likely that they’ll sweep back toward one another in a series of near misses until they eventually merge into one big galaxy. For now, they remain tethered together by a thin stream of stars, gas, and dust particles, like enormous intergalactic bolas, which can only mean one thing: space Incas.
08. Antennae Galaxies
Most of the currently existing star clusters in this galactic pair will part ways before the new galaxy is totally formed—only the largest clusters will survive the merger. Perhaps the most interesting thing we can learn from observing this process is what will happen when the Milky Way inevitably merges with the nearby Andromeda galaxy, which is headed in our direction. Don’t worry, though: It won’t be for a few billion years.
07. Sombrero Galaxy
When we look at the bulge a bit closer, you can see that it’s actually made up of several different clusters of stars, rather than just one big one. The brim is pretty strange, too: Its intricate detail is another one of those things about space that makes science scratch its head. We’re not sure how rings like this were able to form. It’s also highly likely that the heart of the Sombrero Galaxy harbors a massive black hole.
06. Centaurus A
05. The Southern Pinwheel
Located in the Hydra constellation, the Southern Pinwheel Galaxy, also known as M83, is one of the brightest galaxies in our night sky. We discovered it about 250 years ago, but it was considered a gas cloud until we were able to give it a much closer look. The vibrant colors in this enormous whirlpool of pink and purple are this galaxy’s most distinct feature, apart from the frequent supernova explosions observed by astronomers. There are currently eight active supernovas that we’ve observed in the galaxy and remnants of hundreds more. The pink color is a direct result of the new stars forming in the system, which release an immense amount of UV energy. That energy is absorbed by the surrounding dust and gas, turning it pink. Definitively calling it the prettiest galaxy is probably a bit subjective, but it does look like a giant space flower, so judge for yourself.
04. NGC 474
NGC 474 looks less like a galaxy and more like one of those weird, bioluminescent fish you find on the abyssal plain of the ocean. Astronomers aren’t entirely sure what is causing the discharge of so much energy from the otherwise boring-looking galaxy, but there are two prevailing theories. First, the shells could be the remnants of smaller galaxies absorbed by NGC 474. They could also be a result of tidal interactions with the galaxy behind it, seeing as they are in the process of colliding with one another. Because of these bizarre outer shells, we’ve learned that most known galaxies have irregular halos around them as a result of collisions with other galaxies in the “recent” (on a cosmic scale) past.
03. NGC 660
02. The Porpoise Galaxy
The dolphin portion used to be a spiral galaxy similar to the Milky Way, but the immense gravitational forces of the denser galaxy below has contorted its shape significantly. The dolphin’s “eye” is what used to be the spiral galaxy’s core. This galaxy is also within the Hydra constellation, and within a billion years or so, the pair will merge into one. For now, we’ll just enjoy the galactic equivalent of a clown making balloon animals.
01. The Black Eye Galaxy
Strangely, the stars and gas in the reddish portion of the galaxy are all rotating in one direction, while the immense cloud of gas and dust surrounding it rotates the other way. While this is really bizarre, it’s explained in the same manner as most galaxy irregularities—it’s most likely the result of two galaxies merging together.
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