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- EMBARGOED UNTIL: 2:45 p.m. (CST) January 15, 1996
-
- PHOTO NO.: STScI-PRC96-04
-
-
- HUBBLE SPACE TELESCOPE CAPTURES FIRST DIRECT IMAGE OF A STAR
-
-
- This is the first direct image of a star other than the Sun, made with
- NASA's Hubble Space Telescope. Called Alpha Orionis, or Betelgeuse, it
- is a red supergiant star marking the shoulder of the winter
- constellation Orion the Hunter (diagram at right).
-
- The Hubble image reveals a huge ultraviolet atmosphere with a
- mysterious hot spot on the stellar behemoth's surface. The enormous
- bright spot, more than ten times the diameter of Earth, is at least
- 2,000 Kelvin degrees hotter than the surface of the star.
-
- The image suggests that a totally new physical phenomenon may be
- affecting the atmospheres of some stars. Follow-up observations will
- be needed to help astronomers understand whether the spot is linked to
- oscillations previously detected in the giant star, or whether it moves
- systematically across the star's surface under the grip of powerful
- magnetic fields.
-
- The observations were made by Andrea Dupree of the Harvard- Smithsonian
- Center for Astrophysics in Cambridge, MA, and Ronald Gilliland of the
- Space Telescope Science Institute in Baltimore, MD, who announced their
- discovery today at the 187th meeting of the American Astronomical
- Society in San Antonio, Texas.
-
- The image was taken in ultraviolet light with the Faint Object Camera
- on March 3, 1995.
-
- Hubble can resolve the star even though the apparent size is 20,000
- times smaller than the width of the full Moon -- roughly equivalent to
- being able to resolve a car's headlights at a distance of 6,000 miles.
-
- Betelgeuse is so huge that, if it replaced the Sun at the center of our
- Solar System, its outer atmosphere would extend past the orbit of
- Jupiter (scale at lower left).
-
- Credit: Andrea Dupree (Harvard-Smithsonian CfA), Ronald Gilliland
- (STScI), NASA and ESA
-
- Image files in GIF and JPEG format and captions may be accessed on
- Internet via anonymous ftp from ftp.stsci.edu in /pubinfo.
-
- GIF JPEG
- PRC96-04 Betelgeuse gif/Btlgeuse.gif jpeg/Btlgeuse.jpg
-
- Higher resolution digital versions (300dpi JPEG) of the release
- photograph will be available temporarily in /pubinfo/hrtemp:
- 96-04.jpg.
-
- GIF and JPEG images, captions and press release text are available via
- World Wide Web at URL http://www.stsci.edu/pubinfo/PR/96/04.html, or
- via links in http://www.stsci.edu/pubinfo/Latest.html and
- http://www.stsci.edu/pubinfo/Pictures.html.
-