Planetary Science
- Planetary Science
Martian doings
The Mars Reconnaissance Orbiter has finished reshaping its orbit, while the venerable rover Opportunity is approaching the rim of the widest and deepest crater it has yet visited.
By Ron Cowen - Planetary Science
Oversize Orb: Puffy planet poses puzzle
Astronomers have discovered what may be the largest planet ever found, an orb 36 percent wider than Jupiter that circles a nearby star.
By Ron Cowen - Planetary Science
Rare Uranian eclipse
The Hubble Space Telescope has for the first time recorded an eclipse on Uranus.
By Ron Cowen - Planetary Science
Doggone! Pluto gets a planetary demotion
The solar system has only eight planets, and Pluto isn't one of them, according to the first-ever definition of a planet, approved last week by the General Assembly of the International Astronomical Union.
By Ron Cowen - Planetary Science
Titan’s Lakes: Evidence of liquid on Saturn’s largest moon
New radar images strongly suggest that Saturn's giant moon Titan contains lakes of liquid hydrocarbons, marking the first time that researchers have found compelling evidence for bodies of liquid on the surface of any object beyond Earth.
By Ron Cowen - Planetary Science
Close look confirms two eyes on Venus
A spacecraft that recently arrived at Venus has confirmed that the atmosphere above the planet's south pole harbors an unusual storm feature; a giant, double vortex.
By Ron Cowen - Planetary Science
Jovian storms of surpassing beauty
A new near-infrared image of two giant, oval storms in Jupiter's southern hemisphere reveals that they are now brushing past each other closely, separated by only 3,000 kilometers.
By Ron Cowen - Planetary Science
Some deadly monikers
Two recently found small moons orbiting Pluto have now been officially dubbed Nix and Hydra.
By Ron Cowen - Planetary Science
Lots of red dust, but not much noise
In space, no one can hear you scream, but a new analysis suggests that it's pretty quiet on Mars, too.
By Sid Perkins - Planetary Science
The sands of Titan
Although the surface of Saturn's moon Titan is cold enough to freeze methane, it has sand dunes like those in the Arabian Desert, according to radar images taken by the Cassini spacecraft.
By Ron Cowen - Planetary Science
Hubble eyes Jupiter’s second red spot
Hubble Space Telescope images are providing astronomers with the sharpest views yet of a new red spot on Jupiter.
By Ron Cowen - Planetary Science
The Whole Enceladus
Saturn's moon Enceladus has become the hottest new place to look for life in the chilly outer solar system.
By Ron Cowen