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Scientists have analyzed data from K2, the follow-up mission to NASA's Kepler Space Telescope, and have discovered a trove of possible exoplanets amid some 50,000 stars. The scientists report the discovery of nearly 80 new planetary candidates, includ

Astronomers have discovered two new planetary systems, one of them hosting three planets with the same size of the Earth.

CAPE CANAVERAL, Fla. (AP) — New Mars discoveries are advancing the case for possible life on the red planet, past or even present.

Nasa's Curiosity rover has found organic matter preserved on Mars, in a discovery that could suggest it was once home to life.

Small but rowdy space rocks pushing and jostling one another may have created the unusual orbits some astronomers cite as the signature of the hypothesized "Planet Nine," a new study suggests.

Proposed 'HAVOC' mission would send a blimp-like airship to Earth's nearest neighbor.

NASA's Mars rover Curiosity has apparently found something intriguing on Mars and the space agency will unveil the discovery to the public in a live webcast Thursday (June 7).

Researchers have identified more than 100 giant exoplanets that could have potentially life-hosting moons. The new analysis could change the way scientists search for life in the cosmos, study team members said.

A team of researchers from the Instituto de Astrofsica de Canarias (IAC) in Spain and the University of Cambridge have published a new study showing that Exoplanet WASP-127b is likely to hold multiple metals in its atmosphere as judged by its 'fingerp

Over the past week, NASA's tiny MarCO-A and MarCO-B spacecraft have been firing their onboard thrusters to refine their course toward Mars. No cubesat had ever performed such a "trajectory correction maneuver" before, agency officials said.

A newly selected NASA mission should help scientists better understand the bubble that surrounds the solar system, agency officials said.

Earlier this year, astronomers stumbled upon a fascinating finding: Thousands of black holes likely exist near the center of our galaxy.

A NASA spacecraft is about to get up close and personal with Ceres, a giant asteroid that also happens to be the only dwarf planet in the inner solar system.

Searching for habitable exomoons will "greatly expand" the places we can look for life, a scientist says.

Images from the New Horizons spacecraft reveal dunes on Pluto — but the sand-sized grains must have had an unusual boost to get moving.

A five-year survey of the outer reaches of the solar system has led scientists to discover as many as 840 previously unknown small planets. They believe there could be as many as 90,000 little icy worlds more.

It's no secret that the Milky Way is huge, long thought to be about 100,000 light-years end to end with about 200 billion stars and their orbiting planets, but new research shows that it may be much bigger than we...

Astronomers argue that there's an undiscovered giant planet far beyond the orbit of Neptune. A newly discovered rocky body has added evidence to the circumstantial case for it.

Scientists re-examining data from an old mission bring new insights to the tantalizing question of whether Jupiter's moon Europa has the ingredients to support life. The data provide independent evidence that the moon's subsurface liquid water res

In February of 2017, a team of European astronomers announced the discovery of a seven-planet system orbiting the nearby star TRAPPIST-1. Aside from the fact that all seven planets were rocky, there was the added bonus of three of them orbiting within TRA