Space

David Zax is a former writing intern at Smithsonian magazine and is the author of "Galileo's Vision."

David Zax on “Galileo’s Vision”

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Apollo Astronauts Push for Mission to Mars

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Moon Landing Video Restored

Galileo Galilei invented the geometric and military compass. It was his first commercial scientific instrument.

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 Legacy of Apollo

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Picture of the Week—Apollo 11 Solar Wind Composition Experiment

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The Apollo 11 Owners’ Workshop Manual

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A New Kind of Black Hole

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Find the International Space Station with Twitter

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An Explanation for the Missing Sunspots

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Picture of the Week--Next-Gen Mars Rover

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Hubble's Ugliest Photographs

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Vote for NASA’s Greatest Achievement in Earth Observation

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A Spaceship Visits the National Mall

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Picture of the Week—Saturn

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Vote for Hubble’s Next Target

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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

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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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