A new study shown by NASA scientists at the Goldschmidt conference this week provides further evidence that Europa's ocean is habitable and similar to Earth's oceans.

Astronomers just announced the most massive quasar yet known in the early universe. Its monster central black hole has a mass equivalent to 1.5 billion of our suns. The object has been given a Hawaiian name, Poniua'ena.

"What if extraterrestrial intelligences are not like us, but are found in the frigid reaches of the outer solar system, the extreme gravity of neutron stars, the brilliant cores of active galaxies, or the hearts of the richest galaxy clusters?"

The science world is buzzing about a new discovery made via the LIGO-Virgo collaboration. It's a new object found in the so-called "mass gap" between neutron stars and black holes.

Saturn's largest moon Titan is drifting away from the planet 100 times faster than previously thought, according to a new study from researchers in the U.S., France and Italy.

This week, a citizen scientist spotted a never-before-seen comet in data from the sun-observing SOHO spacecraft. It was SOHO's 4,000th comet discovery. Learn more and watch comets sweep near the sun in this video.

Researchers in Europe have now confirmed the universality of free fall - which Einstein called his most fortunate thought - with extremely high precision. To do it, they spent 8 years tracking a triple star system containing a millisecond pulsar.

Solar Orbiter swept as close as 50 million miles (77 million km) to our sun's surface. Now scientists are at work testing the spacecraft’s 10 science instruments, including the 6 telescopes on-board. New images, to be released in mid-July, will be the closest of the sun ever captured.

New images from the fringes of our solar system. The fast-moving New Horizons spacecraft sees a parallax shift - a different apparent position against the background stars - for Proxima Centauri.

Researchers from Germany and the US have discovered an exoplanet less than twice the size of Earth orbiting at about the same distance from its star, making it the closest analog to the Earth-sun system known so far.