Speedboy Johnson

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The Week In Numbers: A Planet That Rains Glass, NASA's New Hunt For Life, And More

<b>63 light-years</b>: the distance from Earth to the blue exoplanet HD 189773b, which looks like a cozy place to live—except its surface temperature is 1,000 degrees Celsius and it rains glass. Sideways.<p><b>5.5 million square feet</b>: the floor space of the new world's largest building, which could fit 20 …

Starwatch: What's the dark matter?

If we could look back at our Milky Way galaxy from deep space then we might view something very like this Hubble image of the galaxy NGC 5754. Both …