The Gaia mission, launched by the European Space Agency, has completed a decade of groundbreaking astronomical observations, collecting over three trillion data points on two billion stars and ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

The NSF–DOE Vera C. Rubin Observatory will create an opportunity for precision in space exploration that has never been ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

But how well do you really know our planetary neighbor? This quiz of 15 questions will test your knowledge of Mars' size, surface and history, as well as scientists' attempts to study it. Remember to ...

Conflicting distance measurements have added to the uncertainty. One data source places one object at 6,500 light years away, ...

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