Researchers have shared a radical new idea for how to put a spacecraft in orbit around Neptune: Use the thin atmosphere of Triton, Neptune's largest moon, to capture it.

Astrologer Valerie Mesa shares your horoscope for July, including what will be your biggest obstacle this month.

Neptune’s largest moon, Triton, and the dwarf planet Pluto may have shared a common origin before being separated in the early solar system, an analysis of their composition suggests.

Triton is Neptune’s biggest moon, discovered in 1846 by William Lassell. What makes it fascinating is that it orbits backward (called a retrograde orbit), opposite to Neptune’s rotation.

Several planets stand still in the sky, Titan’s shadow transits Saturn, and Venus gives Taurus a second eye in the sky this ...

Welcome to your July horoscope! Coming off of the celebratory astrology of June, and with Neptune, Saturn and Mercury going retrograde, there’s a strong pull to slow down and integrate this month. But ...

Pluto May Have Captured Its Biggest Moon After an Ancient Dance and Kiss Charon is large in size relative to Pluto, and is locked in a tight orbit with the dwarf planet.

The moon Triton tends to let off steam A photo montage of Neptune peeking behind its largest moon, Triton NASA / JPL Among Neptune’s 16 known moons, the largest, Triton, is an oddball.

"Kiss and capture": New theory explains how Pluto captured its biggest moon Research on Charon's cosmic dance with Pluto could have implications for other objects in the Kuiper Belt ...

Charon, its biggest of five moons, was discovered in 1978 by the U.S. Naval Observatory. At about 750 miles wide, it's half the size of Pluto — extremely large for a moon.