Astronomy, Solar System | featured news

More than 35 years after it launched on a mission to explore the cosmos, NASA's unmanned Voyager spacecraft appears to have left the solar system and is in a "new region" of space, said a study Wednesday.

The Cassini Solstice mission has discovered what appears to be a miniature version of the Nile River on Saturn's largest moon, Titan. In comparison, the Nile is 4,132 miles long. The 250-mile long feature -- from 'headwaters' to a large sea -- is the longest extraterrestrial river ever to be discovered and imaged to such high resolution.

The Voyager 1 spacecraft is traveling through a previously unknown region of deep space as it heads out of our solar system, which might happen soon, scientists reported Monday. Voyage and its twin, Voyager 2, were launched in 1977 and will become the first man-made objects to exit our celestial neighborhood -- relatively soon.

Astronomers have obtained an important first look at the dwarf planet Makemake - finding it has no atmosphere. One of five such dwarfs in our Solar System including former planet Pluto, Makemake had until now eluded study. But in April 2011, it passed between the Earth and a distant star, and astronomers used seven telescopes to study how the star's light was changed.

Jet Propulsion Laboratory scientists aren't sure what to expect, but they think it's nearing interstellar space. In 1977, Jimmy Carter moved into the White House, "Star Wars" and "Saturday Night Fever" premiered in theaters and the Voyager 1 and 2 spacecraft launched from Florida's Cape Canaveral to explore the outer solar system.

A star already known to host five alien planets may actually be home to a whopping nine full-fledged worlds - a planetary arrangement that, if confirmed, would outnumber our own solar system and set a new record for the most populated system of extrasolar planets yet found.

A glimpse beyond our solar system reveals the neighborhood just outside the sun's influence is different and stranger than expected, scientists reported Tuesday....

The Milky Way galaxy may be filled with millions upon millions of Jupiter-sized planets that have escaped their solar systems and are wandering freely in space, researchers said Wednesday in a finding that seems certain to make astronomers rethink their ideas about planetary formation.

Astronomers have discovered a new Trojan asteroid in a space graveyard near Neptune

A European space probe headed toward its next target Sunday after sending back detailed images of an asteroid that scientists hope will increase understanding of how the solar system evolved.