Earth, between sweltering Venus and frozen Mars, formed and orbits within a band where water could persist in solid, liquid, and gaseous phases. Mars had surface water, but not as much as Earth, and ...

The Arecibo Message as it appears when its 1,679 bits are properly aligned on a grid (left), an annotated illustration ...

In 2024, you can catch Venus in the western sky during evenings in the western sky during July 30 to Dec. 31. Look for an orb shining with a steady, silvery light, brighter than the stars around it.

Astronomers using the James Webb Space Telescope have detected possible signs of gases released by volcanic activity on a ...

Fly about 2,600 light-years to Hubble Space Telescope imagery of the Cygnus loop nebula. See images from 2001 and 2020.

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

The Hubble Space Telescope has captured two tangled galaxies, whose interactions have caused knots to form in the ...

This record-smashing flyby of the Sun is being accomplished by the Parker Solar Probe performing a gravity-assist from Venus, ...