News tagged with galaxies

Ultra-luminous X-ray sources in starburst galaxies

Ultra-luminous X-ray sources (ULXs) are point sources in the sky that are so bright in X-rays that each emits more radiation than a million suns emit at all wavelengths. ULXs are rare. Most galaxies (including ...

dateDec 22, 2014 in Astronomy
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Image: Hubble sweeps a messy star factory

This sprinkle of cosmic glitter is a blue compact dwarf galaxy known as Markarian 209. Galaxies of this type are blue-hued, compact in size, gas-rich, and low in heavy elements. They are often used by astronomers ...

dateDec 22, 2014 in Astronomy
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Staying warm: The hot gas in clusters of galaxies

Most galaxies lie in clusters, groupings of a few to many thousands of galaxies. Our Milky Way galaxy itself is a member of the "Local Group," a band of about fifty galaxies whose other large member is the ...

dateNov 28, 2014 in Astronomy
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FIDO specs to pave way for post-password era

Dedicated to easier yet stronger authentication, the FIDO (Fast IDentity Online) Alliance announced Tuesday that it has published specifications, for broad industry adoption of strong authentication next ...

dateDec 10, 2014 in Security weblog
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Why does the Milky Way rotate?

We live in a galaxy that is called the Milky Way. It's called a barred spiral galaxy, which means that it has a spiral shape with a bar of stars across its middle. The galaxy is rather huge—at least 100,000 ...

dateFeb 11, 2015 in Astronomy
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How far back are we looking in time?

The Universe is a magic time window, allowing us to peer into the past. The further out we look, the further back in time we see. Despite our brains telling us things we see happen at the instant we view ...

dateMar 06, 2015 in Astronomy
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What's happening in the universe right now?

There are some topics that get a little frustrating in their pedantry, but can really draw attention to the grand scope and mechanics in our Universe. This is definitely one of them.

dateJan 30, 2015 in Astronomy
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