One Universe at a Time

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A Universe Of Antimatter

In Cosmology by Brian Koberlein24 November 20175 Comments

If our universe were made of antimatter, what would it look like?

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Dark Matter Isn’t Warm And Fuzzy

In Cosmology by Brian Koberlein3 August 20175 Comments

A new survey of distant quasars shows that dark matter isn’t warm and fuzzy.

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How To Define Distance In An Expanding Universe

In Cosmology by Brian Koberlein28 May 20176 Comments

On a cosmic scale the notion of distance is more subtle than you might think.

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Bigger, Stronger, Faster

In Cosmology by Brian Koberlein1 February 20178 Comments

New observations of lensed quasars show the Universe is expanding faster than expected. But these results raise questions about the assumptions of our cosmological models.

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Antimatter Astronomy

In Cosmology by Brian Koberlein2 January 201718 Comments

Matter and antimatter emit the same spectra of light. So how do we know that distant galaxies aren’t made of antimatter?

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A Light Change

In Cosmology by Brian Koberlein7 December 20166 Comments

Was the speed of light much faster in the early universe?

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The Stars Uncounted

In Cosmology by Brian Koberlein28 November 20162 Comments

The relativistic effect of gravitational lensing allows astronomers to see the faintest galaxies.

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Sense Of Direction

In Cosmology by Brian Koberlein4 October 20163 Comments

The Universe has no preferred direction, and that’s a good thing.

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The Constant Of Time

In Cosmology by Brian Koberlein13 September 20162 Comments

The rate of cosmic expansion has changed over time. So why does it look like a constantly expanding universe?

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About The Author

Brian Koberlein is an astrophysics professor who can't stop rambling about how awesome the Universe is.