Know what this is? It’s a picture of two galaxies colliding. They’re known as the “Antennae” colliding galaxies (I guess some astronomer thought they look like a bug’s antennae), about 63 million light years away in the constellation Corvus.
Righ now, they don’t look much like galaxies because they are tearing each other apart. That is one of the things that can happen when galaxies collide–if they’re evenly matched. But other things can happen when two galaxies interact if they aren’t so evenly matched. If one is much smaller than the other, it may get torn apart and absorbed by the larger galaxy. Or, if it hits it at the right angle, it may plunge through the larger galaxy, perhaps getting caught in its gravity, looping back, and plunging through several more times.
Now, we live in a big galaxy, as galaxies go. It’s one of the largest galaxies on the block. Together with the Andromeda and Triangulum galaxies, the Milky Way is one of the three largest members of the Local Group (which consists of about 35 galaxies).
The fact our galaxy is so big makes it relatively safe from destructive collisions with other galaxies, but the thought of the Milky Way colliding with other galaxies is still rather scary. But guess what–It’s happened before!
The brightest globular cluster we can see in the Milky Way–known as Omega Centauri–now appears to be the remnant of a galaxy the Milky Way ate for breakfast.
Another galaxy–known as the Sagittarius dwarf–has it hit the Milky Way a number of times and is due to do so again in, oh, the next hundred million years. We’ve already been stripping stars off of it, and it’s likely to end up getting absorbed by us, too.
But we found out last year that the Milky Way is gobbling up another galaxy RIGHT NOW! It’s known as the Canis Major dwarf, and it’s the closest galaxy to us–about 25,000 light years away from the solar system, which makes it closer to us than we are to the center of our galaxy (27,000 ly away). Soon its inhabitants (if any) will be fellow Milky Way-ians . . . just like us.
Message to inhabitants of the Canis Major dwarf: “Resistance is futile. You will be assimilated.”
LOLOL. Now a Borg reference thrown in. Can it keep getting better? In all seriousness, that was an interesting post. However, it’s a little flawed… everyone knows how the universe really works. 😉
Awesome!! I love space stuff (that’s a technical term so hush!). I’ve always liked looking at the stars and can’t wait to get a decent telescope. Can you imagine being in Heaven and being shown galactic events like this is a more time collapsed manner?! Awesome!