Planets that orbit white dwarf stars should be too hot to host alien life, theories suggest. But a new study accounting for ...

Image specialist Andy Saunders on mining NASA's archives for the ultimate record of America's early space programs ...

Space scientists look back on three decades of exoplanet discoveries—from rows of massive ‘super-Earths‘ to worlds with ...

Mercury will be farthest from the sun on Tuesday (Aug. 19), granting early risers a perfect opportunity to spot the fleet-footed world somewhat separated from the glare of our parent star. Mercury ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

We have mapped and discovered a large portion of the most dangerous asteroids in the Solar System, but there is a glaring ...

Jaw-dropping scenes show a "train" of Elon Musk's Starlink satellites in orbit - along with an impressive aurora. NASA ...

The month is packed with skywatching highlights—including two galaxies visible to the naked eye and a rare glimpse of the ...