galaxies

Are Intelligent Civilizations Doomed?

by Fraser Cain August 25, 2014

Want to stay on top of all the space news? Follow @universetoday on Twitter One answer to the Fermi Paradox is the idea of the Great Filter; the possibility that something wipes out 100% of intelligent civilizations. That why we’ve never discovered any aliens… they’re all dead. Is that our future too? Remove this ad […]

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How Big is the Universe?

by Brian Koberlein August 11, 2014

The Universe is big, but how big is it? That all depends on whether the Universe is finite or infinite. Even the word “big” is tough to get clear. Are we talking about the size of the Universe we can see, or the Universe’s actual size right now? Remove this ad Brian Koberlein on Google+

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Why is Everything Spherical?

by Fraser Cain June 26, 2014

Have you ever noticed that everything in space is a sphere? The Sun, the Earth, the Moon and the other planets and their moons… all spheres. Except for the stuff which isn’t spheres. What’s going on? Remove this ad Fraser Cain on Google+

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How Much of the Universe is Black Holes?

by Fraser Cain June 16, 2014

We all fear black holes, but how many of them are there out there, really? Between the stellar mass black holes and the supermassive ones, just how much of our Universe is black holes? There are two kinds of black holes in the Universe that we know of: There’s stellar mass black holes, formed from […]

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“Fossil Galaxy” Discovered From the Early Universe

by Shannon Hall May 4, 2014

A small galaxy circling the Milky Way may be a fossil left over from the early Universe. The stars in the galaxy, known as Segue 1, are virtually pure with fewer heavy elements than those of any other galaxy known. Such few stars (roughly 1,000 compared to the Milky Way’s 100 billion) with such small […]

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