Inflation and budget issues are threatening to hobble NASA’s most in-demand telescopes.

Is the Hubble constant—a key part of how we measure the expansion of our universe—in a crisis? Some cosmologists say yes.

Hubble Space Telescope and MAVEN mission have been used to help unravel the mystery of Mars' escaping water. Credit: NASA ...

Astronomers have added two more exoplanets to a growing study aimed at finding out whether rocky worlds near small, faint ...

Hubble Space Telescope imagery created an HD look at the gas giant planet Jupiter. Credit: NASA Goddard Space Flight Center ...

This serene spiral galaxy hides a cataclysmic past. The galaxy IC 758, shown in this NASA/ESA Hubble Space Telescope image, ...

A team of astronomers have put together the largest, most detailed map of the universe ever created – and you can explore it ...

Scientists using NASA's Hubble Space Telescope went looking for evidence of one phenomenon and found quite another.

NGC 4449 is a dwarf galaxy turned stellar powerhouse, dazzling astronomers with its explosive star-forming activity and rich ...

The James Webb Telescope reveals a never-before-seen infrared image: thousands of galaxies and ancient stars expose cosmic ...

NASA scientists found evidence of darkness on the 'leading side' of Uranus' moons, which they expected to be bright.