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betapics.txt
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1996-01-12
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RELEASE DATE: October 10, 1995
PHOTO NO.: STScI-PRC95-38
HUBBLE SEES THIN DISK AROUND THE STAR BETA PICTORIS
[Top] - This NASA Hubble Space Telescope image of a portion of a vast
dust disk around the star Beta Pictoris shows that the disk is thinner
than thought previously. Estimates based on the Hubble image place the
disk's thickness as no more than one billion miles (600 million
kilometers), or about 1/4 previous estimates from ground-based
observations. The disk is tilted nearly edge-on to Earth. Because the
dust has had enough time to settle into a flat plane, the disk may be
older than some previous estimates. A thin disk also increases the
probability that comet-sized or larger bodies have formed through
accretion in the disk. Both conditions are believed to be
characteristic of a hypothesized circumstellar disk around our own Sun,
which was a necessary precursor to the planet-building phase of our
Solar Systems, according to current theory.
Credit: Al Schultz (CSC/STScI) and NASA
[Bottom] - For comparison the disk appears four times thicker in a
ground-based image of Beta Pictoris due to the limitation of
atmospheric seeing. This red-light image (approximately 7,000
Angstroms) image was obtained at the Mauna Kea Observatory, Hawaii, on
the 2.2-meter telescope. (Kalas, P., & Jewitt, D. 1995, AJ, 110, 794)
Credit: Paul Kalas (University of Hawaii 2.2-m telescope, Mauna Kea)
HST imaging team: Al Schultz, Helen Hart (Computer Sciences
Corporation), Kent Reinhard (Doane College, NE), Fred Bruhweiler, Mike
DiSanti (Catholic University of America), Glenn Schneider (Steward
Observatory, University of Arizona), and NASA.
Image files in GIF and JPEG format may be accessed on Internet via
anonymous ftp from ftp.stsci.edu in /pubinfo.
The same images are available via World Wide Web from URL
http://www.stsci.edu/pubinfo/Latest.html, or via links in
http://www.stsci.edu/pubinfo/Pictures.html.
GIF JPEG
PRC95-38 Beta Pic Disk gif/BetaPicS.gif jpeg/BetaPicS.jpg