Jupiter May Have Destroyed The Solar System's First Planets

It is becoming increasingly obvious that our Solar System — with its inner collection of small rocky planets and an outer region buffeted by gas planets — is quite uncommon. According to a remarkable new study, the reason may have to do with Jupiter and an ancient migratory journey that kickstarted the destruction of… » 3/24/15 8:00am Tuesday 8:00am

This “Super Saturn” Has An Enormous Ring System And Maybe Even Exomoons

Astronomers watching the repeated and drawn-out dimming of a relatively nearby Sun-like star have interpreted their observations to indicate an eclipse by a gigantic exoplanet's complex ring system, similar to Saturn's except much, much bigger. » 1/27/15 9:30am 1/27/15 9:30am

This Extreme Exoplanet Just Got Its Own Weather Map

A gas giant located about 260 light-years from here has winds that howl at the speed of sound and a day side that's hot enough to melt iron. We know this because astronomers have just made the most detailed weather map of the temperature of an exoplanet's atmosphere. Here's the forecast for WASP-43b. » 10/10/14 12:40pm 10/10/14 12:40pm

This Massive Planet Is Causing Its Parent Star To Age Prematurely

There's a gas giant located about 330 light-years from here that's not only unusually large, it's also orbiting its host star at an incredibly close distance. According to a new study, this combination of factors is wreaking havoc on the star's innards. » 9/17/14 12:40pm 9/17/14 12:40pm

A Giant Planet That's Freakishly Far From Its Sun

Canadian astronomers have discovered a gigantic planet-like object that's so far from its parent star that it takes 80,000 years to complete a single orbit — a distance that's 50 times farther than Pluto is from our sun. The discovery may force a re-think into how and where planets are capable of forming. » 5/14/14 3:40pm 5/14/14 3:40pm

Saturn May Have Just Spawned A New Moon

New images acquired by Cassini show a bright clump orbiting Saturn at the outermost edge of its outer ring. Astronomers say it could be a brand new moon in the process of being born. » 4/15/14 8:40am 4/15/14 8:40am

Astronomers may have just discovered a new class of planets

Located nearly 500 light-years away, ROXs 42Bb is a newly discovered object that astronomers are struggling to define — a unique celestial body that's challenging conventional notions about how planets and stars form. » 1/09/14 2:40pm 1/09/14 2:40pm

Hot Jupiters are the most astounding planets in the galaxy

They’re big, full of gas, and have a penchant for hanging out way too close to their parents. These “hot Jupiters” are among the most common extrasolar planets in the galaxy. Here’s what the latest science is telling us about these celestial wonders. » 8/21/13 10:09am 8/21/13 10:09am