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Galileo’s Instruments of Discovery
With these various instruments, Galileo Galilei was able to look into space and change our view of the universe.
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The Milky Way is Bigger, Faster, and Heading for Trouble
Have you heard that the Milky Way is bigger than we thought? Fifty percent bigger, according to new measurements
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Picture of the Week—Christmas Tree Cluster
If it is clear out tonight, grab your binoculars or a telescope and look up at the constellation of Monoceros, the Unicorn
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Picture of the Week—Jupiter and Ganymede
How far we have come from 1609, when Galileo Galilei first aimed his telescope towards the little twinkly dots in the sky and saw stars and planets
Sixteen Years of Black Hole Watching Pays Off
How do you prove that a black hole exists? It is so dense, not even light can escape its grasp
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