Neptune: The Other Blue Planet in Our Solar System | Neptune, the Eighth Planet is an Ice Giant

Chart shows conditions on Triton, moon of Neptune.

Living on Triton: Neptune's Moon Explained (Infographic)

By Karl Tate published 24 March 15

Triton's surface is so cold, the ground is made of frozen nitrogen.

This artist's illustration shows NASA's New Horizons spacecraft during its flyby of the Pluto system on July 14, 2015.

Bringing Pluto into Focus: Q&A with New Horizons PI Alan Stern

By Mike Wall published 26 January 15

Alan Stern, principal investigator of NASA's New Horizons mission to Pluto, talks to Space.com about the probe's July 14 flyby of the dwarf planet.

Laser-driven shock compression of stishovite was used to study the melting temperature of silica deep inside the mantle of rocky exoplanets and the core of giant planets.

Zap! Laser Blasts Shed Light on Cores of Alien Planets

By Charles Q. Choi published 22 January 15

Mysterious Planet X May Really Lurk Undiscovered in Our Solar System

By Mike Wall published 16 January 15

Find Uranus, Neptune in the Night Sky Now

By Joe Rao published 26 November 14

Observers with keen eyes will be able to see two little-spotted planets in the night sky this season.

The planet Neptune shines a serene blue in this image assembled from two photos by NASA's Voyager 2 probe during its historic flyby of the planet in August 1989. Neptune reaches an orbital milestone called opposition in the night sky on Aug. 29, 2014.

Neptune and 'Dodgeball' Asteroid Star in Webcasts Tonight: Watch Live

By Mike Wall published 29 August 14

Galileo's Sketch of Jupiter's Moons, Dec. 27/28, 1612

Cosmic Quest: Who Really Discovered Neptune?

By Geoff Gaherty published 28 August 14

A New World: NASA Recalls Voyager 2 Probe's 1989 Neptune Encounter

By Mike Wall published 26 August 14

On to Pluto! NASA Spacecraft Now Beyond Neptune's Orbit (Photos)

By Mike Wall published 25 August 14

Neptune's moon Triton is seen in new detail in this still from a NASA animation showing the best map yet of the moon using data from the Voyager 2 spacecraft collected during a flyby on Aug. 25, 1989.

NASA Unveils Best Map Ever of Neptune's Moon Triton (Images, Video)

By Mike Wall published 22 August 14

Jupiter's Great Red Spot Shrinks to Smallest Size Ever Seen (Video, Photos)

By Elizabeth Howell published 15 May 14

Jupiter's Great Red Spot — the most powerful storm in the solar system — is at its smallest observed size yet, and scientists aren't sure why.

Space History Photo: Voyager 2 Launch

By NASA Archives published 24 February 14

Voyager 2, arriving at Jupiter four months after Voyager 1, was actually launched 16 days before its mate.

Comet Smacked Neptune 200 Years Ago, Data Suggests

Photos of Neptune, The Mysterious Blue Planet

By Space.com Staff published 8 October 13

See amazing photos of the planet Neptune, eighth planet from the sun.

Neptune Reaches Opposition in August 2013

Neptune Shines Best in Telescopes Now: See It Online Tonight

By Geoff Gaherty published 26 August 13

Newborn Star's 'Snow Line' Reveals Clues About Planet Formation

By Nola Taylor Tillman published 18 July 13

Infographic: Facts about Neptune's fourteen moons.

Moons of Neptune: Giant Blue Planet's 14 Satellites Unmasked (Infographic)

By Karl Tate published 17 July 13

First Transiting Planets in Star Cluster Discovered Space Wallpaper

Mini Neptunes | Space Wallpaper

By Space.com Staff published 26 June 13

In the star cluster NGC 6811, astronomers have found two planets smaller than Neptune orbiting Sun-like stars, as seen in this space wallpaper.

Hunting for Alien Worlds (Part 7): Moving Future Missions Forward

By Astrobiology Magazine Staff published 12 June 13

Exoplanet experts answer questions about missions to discover and probe alien worlds.

Next-Generation Transit Survey to Hunt Exoplanets on the Cheap

New Survey Will Hunt for Nearby Alien Planets on the Cheap

By Gemma Lavender published 10 June 13

The Next-Generation Transit Survey is being assembled for around $3 million.

New York City as seen through Mercury's atmosphere

Alien Big Apple: Artist Envisions NYC on Other Planets

By Mike Wall published 20 May 13

The project showcases the diversity of worlds in our solar system.