News tagged with exoplanets

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Nearing one thousand exoplanets

A quiet milestone in modern astronomy may soon come to pass. As of today, The Extrasolar Planets Encyclopedia lists a current tally of 998 extrasolar planets across 759 planetary systems. And although various ...

Oct 21, 2013
4.6 / 5 (9) 3

Explainer: How astronomers find exoplanets

Astronomers didn't know, 20 years ago, whether planets existed around any stars other than the Sun. All that changed in 1995 with the discovery of an exoplanet orbiting the star 51 Pegasi. And by the beginning of 2014, ...

Mar 13, 2014
4.6 / 5 (5) 0

Bright star reveals new exoplanet

An international team of astronomers at Stellar Astrophysics Centre in Aarhus, Denmark, have discovered a new exoplanet, christened "Kepler-410A b." The planet is about the size of Neptune and orbits the ...

Jan 22, 2014
3.8 / 5 (5) 0

Planet affects a star's spin

The discovery of a hot Jupiter exoplanet that transfers orbital momentum to its host star may hold the key to a clearer understanding of the evolution of common planetary systems, according to findings presented ...

Jan 13, 2011
4.3 / 5 (6) 4 | 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

Life may be harder to identify on some exoplanets

Finding life on exoplanets may be more difficult than people thought, said Feng Tian, a professor at the Center for Earth System Science at Tsinghua University in Beijing, China. The report was presented last week to the ...

Oct 11, 2013
3.7 / 5 (6) 0

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

VLT captures first direct spectrum of an exoplanet

(PhysOrg.com) -- By studying a triple planetary system that resembles a scaled-up version of our own Sun’s family of planets, astronomers have been able to obtain the first direct spectrum -- the “chemical ...

Jan 13, 2010
5 / 5 (9) 5 | with audio podcast