News tagged with radial velocities

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Planet spotting

The Extrasolar Planets Encyclopedia counted 548 confirmed extrasolar planets at 6 May 2011, while the NASA Star and Exoplanet Database (updated weekly) was today reporting 535. These are confirmed findings ...

dateMay 09, 2011 in Astronomy
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250 years of planetary detection in 60 seconds

Early astronomers realized some of the "stars" in the sky were planets in our Solar System, and really, only then did we realize Earth is a planet too. Now, we're finding planets around other stars, and thanks ...

dateFeb 12, 2015 in Astronomy
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Lightest exoplanet imaged so far?

(Phys.org) —A team of astronomers using ESO's Very Large Telescope has imaged a faint object moving near a bright star. With an estimated mass of four to five times that of Jupiter, it would be the least ...

dateJun 03, 2013 in Astronomy
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The 3D fireworks of a star

In 1901 the star GK Persei gave off a powerful explosion that has not stopped growing and astonishing ever since. Now a team of Spanish and Estonian astronomers has reconstructed the journey of the emitted ...

dateJan 24, 2013 in Astronomy
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Where's the debris for transiting planets?

For many exoplanet systems that have been discovered by the radial velocity method, astronomers have found excess emission in the infrared portion of the spectrum. This has generally been interpreted as remnants ...

dateSep 06, 2011 in Astronomy
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HARPS tunes in on 'noisy' planets

Able to achieve an astounding precision of 0.97 m/s (3.5 km/h), with an effective precision of the order of 30 cms-1, the High Accuracy Radial velocity Planet Searcher (HARPS) echelle spectrograph has already ...

dateAug 10, 2011 in Astronomy
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