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NASA-ExocometsAroundBetaPictoris-ArtistView.jpg (800 × 538 piksel, ukuran berkas: 91 KB, tipe MIME: image/jpeg)

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English: Credit: NASA/FUSE/Lynette Cook

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http://imagine.gsfc.nasa.gov/docs/features/bios/roberge/roberge_image.html

Aki likes this image because it shows the dynamic nature of the planet-formation process, with many processes operating at once.

This is an artist's conception of the view toward the young star Beta Pictoris from the outer edge of its disk. Beta Pictoris is a 12 million year old star located only 19 parsecs from the Sun. It is surrounded by a disk of dust and gas produced by collisions between, and evaporation of, asteroids and comets. A giant planet may have already formed, and terrestrial (Earth-like) planets may be forming.

A young terrestrial planet gaining mass by collision with an asteroid is shown just to the right of center. The planet is dry and without an atmosphere. It will likely acquire one later from the impact of water asteroids, or other kinds of ice-rich asteroids.

A team of astronomers led by Dr. Roberge used NASA's FUSE telescope to learn that the gas in the Beta Pictoris disk is extremely carbon-rich, much more so than expected, based on what is known about asteroids and comets in our Solar System.

The inset panels show two possible outcomes for mature terrestrial planets around Beta Pic. The top one is a water-rich planet similar to the Earth; the bottom one is a carbon-rich planet, with a smoggy, methane-rich atmosphere similar to that of Titan, a moon of Saturn.

NASA press release: http://www.nasa.gov/vision/universe/starsgalaxies/betapic.html

Publication Date: August, 2007
Tanggal
Sumber http://imagine.gsfc.nasa.gov/Images/bios/roberge/BetaPictoris.jpg
Pembuat NASA/FUSE/Lynette Cook
Versi lainnya File:NASA-ExocometsAroundBetaPictoris-ArtistView-2.jpg

Lisensi

Public domain Berkas ini berada dalam domain publik di Amerika Serikat karena semata-mata diciptakan oleh NASA. Kebijakan hak cipta NASA menyatakan bahwa "materi NASA tidak dilindungi oleh hak cipta kecuali dicatat". (Lihat Template:PD-USGov, Halaman kebijakan hak cipta NASA atau JPL Image Use Policy.)
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Planet formation processes, including exocomets and other planetesimals, around Beta Pictoris

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menggambarkan

Beta Pictoris Inggris

3 Agustus 2007

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