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Astronomy

What does ‘habitable’ really mean?

This artist’s impression shows the planet Proxima b orbiting the red dwarf star Proxima Centauri. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for ...

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How old is our moon?

Right side of the moon. NASA/Goddard Space Flight Center Scientific Visualization Studio Click for a full size image   How old is our moon? Most scientists agree that the Earth has pretty much always had its moon. Details of the ...

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Black Holes Hide in Our Cosmic Backyard

NGC 1448, a galaxy with an active galactic nucleus hidden by gas and dust, is seen in this image. Image credit: Carnegie-Irvine Galaxy Survey/NASA/JPL-Caltech Click for a full size image   Black Holes Hide in Our Cosmic Backyard Monster black ...

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Trump Might Be Thinking About a Moon Base

Click for a full size image   Trump Might Be Thinking About a Moon Base Here’s why that’s a bad idea. Last week, upon leaving the president-elect’s office, Douglas Brinkley, a historian and conservationist, reported that Trump “was very interested ...

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