Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...
The coldest and densest molecular gas clouds in the interstellar medium can have temperatures of 10 K (-505 °F/-263 °C), ...
At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...
New satellite records capture how polar ice sheets slide toward the sea, helping scientists better understand ice loss and ...
T he Hubble Space Telescope (HST) has been pivotal to progress in the last three decades of astronomy and cosmology.
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