Astronomy Picture of the Day

The Four Suns of HD 98800

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#102476 by @ 31.07.2007 00:00 - nach oben -
The Four Suns of HD 98800

Explanation: How would it look to have four suns in the sky? Planets of the HD 98800 system, if they exist, would experience such a view. HD 98800 is a multiple star system about 150 light years from Earth -- right in our section of the Milky Way Galaxy. For years it has been known that HD 98800 consists of two pairs of double stars, with one pair surrounded by a disk of dust. The star pairs are located about 50 AU from each other -- in comparison just outside the orbit of Pluto. Recent data from the Earth-trailing Spitzer Space Telescope in infrared light, however, indicate that the dust disk has gaps that appear consistent with being cleared by planets orbiting in the disk. If so, one planet appears to be orbiting at a distance similar to Mars of our own Solar System. Pictured above is an artist's drawing of how the HD 98800 system might appear to a nearby observer.

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#102477 by @ 31.07.2007 08:01 - nach oben -
yeah, 4 sunne; döt muemmer nie früüre
#102517 by @ 03.08.2007 15:37 - nach oben -
Die beiden Binärsonnen sind 50 Astronimische Einheiten auseinander, das heisst die Erde mit einer AE Abstand hätte die zweite Sonne in 49 AE Abstand, die 2te Sonne wäre so hell wie die unser Mond, vielleicht sogar noch dunkler

Die anderen beiden Binärsonnen sind wohl kaum noch als Sonnen zu erkennen, und eher noch als heller Stern am Nachthimmel :) Trotzdem wärs cool in einem Sternensystem mit mehreren Sonnen zu leben :)