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Your daily source for space and astronomy news. Expert coverage of NASA missions, rocket launches, space exploration, exoplanets, and the latest discoveries in astrophysics.
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Scientist Constructs "Big Picture" of Mars Water from Rover Data
Rover data from more than 20 years ago has revealed clues to the existence of liquid water on ancient Mars. The NASA Spirit Rover carried a specialized instrument called a Mössbauer Spectrometer that performed mineralogical analyses of soil, rock, and dus
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The Asteroid That May Be Three Worlds
We have been watching asteroid (44) Nysa for well over a century without ever really knowing what it looks like. Now the sharpest images ever taken of it, from two of the largest telescopes on Earth, have revealed two deep valleys running right around its
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Interstellar Travel: The Space Age and Nuclear Rockets
Given the state of our technology, it would take a spacecraft a ridiculously long time to reach even the nearest star in our galaxy. However, scientists continue to ponder ways in which we could achieve the dream of interstellar spaceflight. Here are a fe
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Chandrasekhar and the Limits of Physics, Part 2: Humiliation
In 1935 the most eminent astronomer alive stood up in a packed room and called Chandrasekhar's discovery "stellar buffoonery." The story of Arthur Eddington's years-long campaign against a result that everyone privately knew was correct.
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Astronomers Determine that Exoplanets Around Barnard's Star are Extremely Uninhabitable
Scientists have painted the most detailed portrait yet of the planetary system orbiting Barnard's Star. Unfortunately, the picture is not encouraging, as all four planets appear to be "extremely uninhabitable."
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