galaxies
How do Gas and Stars Build a Galaxy?
When we look up at the night sky outside of the bright city, we can see a dazzling array of…
What is Gravitational Lensing?
Gravity's a funny thing. Not only does it tug away at you, me, planets, moons and stars, but it can…
Why Is Andromeda Coming Towards Us?
I don’t want to freak you out, but you should be aware that there’s a gigantic galaxy with twice our…
Like a BOSS: How Astronomers are Getting Precise Measurements of the Universe’s Expansion Rate
Astrophysicists studying the expansion of the Universe with the largest galaxy catalogs ever assembled are ushering in an exciting era…
Disorderly Conduct: Andromeda’s Mature Stars Exhibit Surprising Behavior, Says Study
To a distant observer, our own Milky Way and the Andromeda galaxy would probably look very similar. Although Andromeda is longer, more massive, and…
New Simulation Models Galaxies Like Never Before
Astronomy is, by definition, intangible. Traditional laboratory-style experiments that utilize variables and control groups are of little use to the scientists who…
Weekly Space Hangout – Nov. 14, 2014: Holy Rosetta! We Landed on a Comet!
Host: Fraser Cain (@fcain) Guests: Morgan Rehnberg (cosmicchatter.org / @cosmic_chatter) Brian Koberlein (@briankoberlein) Alessondra Springmann (@sondy) Ramin Skibba (@raminskibba) (more…)
What Part of the Milky Way Can We See?
When you look up and see the Milky Way, you're gazing into the heart of our home galaxy. What, exactly,…
Are Intelligent Civilizations Doomed?
One answer to the Fermi Paradox is the idea of the Great Filter; the possibility that something wipes out 100%…
How Big is the Universe?
The Universe is big, but how big is it? That all depends on whether the Universe is finite or infinite.…