galaxies

Why is Everything Spherical?

by Fraser Cain June 26, 2014

Want to stay on top of all the space news? Follow @universetoday on Twitter 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 […]

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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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‘Runaway’ Star Cluster Breaks Free from Distant Galaxy

by Shannon Hall April 30, 2014

We’ve discovered dozens of so-called “hypervelocity stars” — single stars that break the stellar speed limit. But today astronomers multiplied the number of these ‘runaway’ stars by hundreds of thousands. The Virgo Cluster galaxy, M87, has ejected an entire star cluster, throwing it toward us at more than two million miles per hour. “Astronomers have […]

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New Hubble View Shows Objects a Billion Times Fainter Than Your Eyes Can See

by Nancy Atkinson April 17, 2014

While this image isn’t as deep as the Hubble Deep Field, this 14-hour exposure by the Hubble Space Telescope shows objects around a billion times fainter than what can be seen with the human eyes alone. Astronomers say this image also offers a remarkable depth of field that lets us see more than halfway to […]

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