Saturn's Iconic Rings Surprisingly Young, Cassini Data Show

Saturn’s iconic rings are one of the most stunning phenomena in the Solar System. Photo Credit: NASA/JPL-Caltech

Saturn’s rings are one of the most beautiful and breathtaking sights in the Solar System – but it hasn’t always been that way. New evidence in data sent back by the now-defunct Cassini spacecraft shows that they […]

Is 'Planet 9' Really a Second Massive Kuiper Belt?

The Kuiper Belt is a massive collection of dwarf planet- and asteroid-sized worlds orbiting far past Neptune. Is the hypothetical Planet 9 really a second such belt? Image Credit: T. Pyle (SSC)/JPL-Caltech/NASA

The announcement of a possible large ninth planet in our Solar System way beyond Neptune last month caused a lot of […]

GJ 1132b: Nearest Earth-Sized Exoplanet Discovered So Far May Be a 'Venus Twin'

Artist’s conception of GJ 1132b, an Earth-sized exoplanet orbiting a nearby star. Conditions on this world, however, are probably more like Venus than Earth. Image Credit: Dana Berry

Astronomers have discovered another Earth-sized exoplanet that is the closest one to our own Solar System found so far, but it might not be a […]

A Moon Falling Apart: Grooves on Phobos Are a Sign of its Eventual Catastrophic Fate

The unusual grooves on Phobos’ surface, such as those on the left side of this image, are now thought to be caused by tidal stress. The large crater Stickney is in the upper portion of the image. Image Credit: NASA/JPL-Caltech/University of Arizona

Phobos is the largest of Mars’ two tiny moons, but 50 […]

Rosetta Scientists Answer Question of How 'Rubber Duck' Comet 67P Got Its Shape

Image from July 14, 2015, showing the double-lobed or “rubber duck” shape of Comet 67P and outgassing of water vapor, gas, and dust. Image Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Comet 67P/Churyumov–Gerasimenko, or 67P, has been the focus of intense study by the Rosetta spacecraft since 2014. One of the key mysteries […]

Our 'Glowing Moon': LADEE Spacecraft Discovers Neon in Lunar Atmosphere

Artist’s conception of the LADEE spacecraft orbiting the Moon. Its findings will help scientists to better understand thin exospheres, such as the one our own Moon has. Image Credit: NASA Ames/Dana Berry

The existence of neon gas in our Moon’s ultra-thin atmosphere has been confirmed for the first time, by NASA’s Lunar Atmosphere […]

Gemini Planet Imager Finds Its First Exoplanet, a Methane-Rich 'Young Jupiter'

Discovery near-infrared image of the exoplanet 51 Eridani b taken by the Gemini Planet Imager on Dec. 21, 2014. The relative size of Saturn’s orbit is also shown for comparison. Image Credit: Gemini Observatory/J. Rameau (UdeM)/C. Marois (NRC Herzberg)

The Gemini Planet Imager, a new telescopic instrument designed to find, image, and study […]

Kepler Update: Earth's 'Bigger and Older Cousin' Discovered Orbiting Distant Star

Artist’s conception of Kepler-452b, the first near-Earth-sized exoplanet discovered orbiting in the habitable zone of a Sun-like star. Image Credit: NASA Ames/JPL-Caltech/T. Pyle

One of the primary goals in the search for exoplanets is to, hopefully, find an Earth analog or “Earth twin,” an alien world similar to our own. That search is […]

Massive Alien Ring System Is Much Larger Than Saturn's—And May Contain Exomoons

Artist’s conception of the ring system circling the young giant planet (or brown dwarf) J1407b. Image Credit: Ron Miller

Astronomers today announced yet another mind-boggling finding: a ring system which orbits a distant giant planet has been found to be much larger and more massive than Saturn’s ring system, the best known example […]

Hot 'Super-Earths' Provide Clues to Water in Exoplanet Atmospheres

Artist’s conception of super-Earth 55 Cancri e, one of the few exoplanets so far which astronomers are able to study the atmosphere of. Image Credit: NASA/JPL-Caltech

Some of the most interesting exoplanets discovered so far are the “super-Earths,” rocky worlds which are significantly larger and more massive than Earth but still smaller than […]