News tagged with exoplanet

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Brown dwarf pair mystifies astronomers

(PhysOrg.com) -- Two brown dwarf-sized objects orbiting a giant old star show that planets may assemble around stars more quickly and efficiently than anyone thought possible, according to an international ...

Dec 21, 2009
4.8 / 5 (18) 1

Explained: the Doppler effect (w/ Video)

Many students learn about the Doppler effect in physics class, typically as part of a discussion of why the pitch of a siren is higher as an ambulance approaches and then lower as the ambulance passes by. ...

Aug 03, 2010
3.4 / 5 (24) 21 | with audio podcast

Water-Ice Super-Earths

A "super-Earth" is a planet around another star (an "exoplanet") whose mass is less than about ten times that of the Earth. Of the 480 or so extrasolar planets now known, most have masses larger than the mass ...

Aug 27, 2010
4.7 / 5 (17) 0 | with audio podcast

How common are earths around small stars?

(Phys.org) —The Kepler mission has revolutionized the study of exoplanet statistics by increasing the number of known extrasolar planets and planet candidates by a factor of five, and by discovering systems ...

Jun 03, 2013
4.2 / 5 (19) 16 | with audio podcast

Kepler 78b exoplanet is Earth-like in mass and size

In August, MIT researchers identified an exoplanet with an extremely brief orbital period: The team found that Kepler 78b, a small, intensely hot planet 700 light-years from Earth, circles its star in just ...

Oct 30, 2013
4.9 / 5 (16) 4 | with audio podcast

Alien world is blacker than coal

(PhysOrg.com) -- Astronomers have discovered the darkest known exoplanet - a distant, Jupiter-sized gas giant known as TrES-2b. Their measurements show that TrES-2b reflects less than one percent of the sunlight ...

Aug 11, 2011
4.9 / 5 (14) 21 | with audio podcast

Early exit for hot Jupiter due to deadly tides

(PhysOrg.com) -- Bad news for planet hunters: most of the "hot Jupiters" that astronomers have been searching for in star clusters were likely destroyed long ago by their stars. In a paper accepted for publication ...

Sep 10, 2010
4.7 / 5 (14) 1 | with audio podcast

First Solid Evidence for a Rocky Exoplanet (w/ Video)

(PhysOrg.com) -- The longest set of HARPS measurements ever made has firmly established the nature of the smallest and fastest-orbiting exoplanet known, CoRoT-7b, revealing its mass as five times that of Earth's. ...

Sep 16, 2009
4.6 / 5 (14) 2