News tagged with host star

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Highly inflated Jupiters

There are currently 851 confirmed extra-solar planets. Of these, 289 were detected because their orbits (as seen from Earth) take them across the face of their host star, dimming the star's light in a transit ...

Dec 10, 2012
4.2 / 5 (5) 0 | with audio podcast

When stellar metallicity sparks planet formation

New research predicts the criteria needed for Earth-like planets to form around a star that have one-tenth the metallicity of our Sun. If researchers find small, rocky planets orbiting stars with lower metallicity, ...

Apr 10, 2012
5 / 5 (1) 9 | with audio podcast

The survivors of a 13 billion year old massacre

(PhysOrg.com) -- Our Milky Way galaxy is surrounded by some 200 compact groups of stars, containing up to a million stars each. At 13 billion years of age, these globular clusters are almost as old as the ...

Feb 14, 2012
4.8 / 5 (9) 1 | with audio podcast

Hunting for transits of Super-Earth GJ 581e

(PhysOrg.com) -- An international team of astronomers has ruled out transits of a water-rich or hydrogen-helium atmosphere planet for Gliese 581e. The host star itself is relatively quiet which means good ...

Jun 02, 2011
4.9 / 5 (11) 2 | with audio podcast

The shocking environment of hot Jupiters

(PhysOrg.com) -- Jupiter-like worlds around other stars push shock waves ahead of them, according to a team of UK astronomers. Just as the Earth's magnetic "bow-shock" protects us from the high-energy solar ...

Apr 19, 2011
4.7 / 5 (3) 0 | with audio podcast

The rose-red glow of star formation

The vivid red cloud in this new image from ESO's Very Large Telescope is a region of glowing hydrogen surrounding the star cluster NGC 371. This stellar nursery lies in our neighboring galaxy, the Small Magellanic ...

Mar 30, 2011
4.3 / 5 (4) 1 | with audio podcast

Assumptions about exo-oceans

Some estimates indicate that 25% of Sun-like stars have Earth-like planets. A new study now shows that these planets are almost certain to have oceans if they are located in the right temperature zone around ...

Mar 04, 2011
5 / 5 (13) 16 | with audio podcast

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