Stellar Fireworks Seen on New Year’s Eve
To celebrate the New Year, and to mark the formal debut of its online Image Gallery, the Gemini Observatory has released three striking new images.
The first, taken by the Gemini North telescope atop Mauna Kea on the big island of Hawaii, was made public on New Year's Eve, 2004, and shows the face-on spiral galaxy NGC 6946 ablaze with galactic fireworks. Each explosion of pink is a region of active star formation, where the fierce light of newborn stars is exciting the surrounding hydrogen gas into incandescence. In addition, the fiercest and most massive of these stars have been burning themselves out and ending their lives in an even more spectacular fashion, by detonating in a string of cataclysmic, rapid-fire supernova explosions. Astronomers have observed eight supernovas in this one galaxy in the past 100 years, as opposed to just four in our own galaxy in the past 1000 years, and they suspect that the supernovas have been going off at that rate for tens of millions of years.
|NGC 1532 and 1531: an interacting galaxy pair lying some 55 million light-years from Earth.Credit: Gemini Observatory/Travis Rector, University of Alaska, Anchorage|
The other two images were released today at the 205th meeting of the American Astronomical Society in San Diego. Both were obtained on December 5, 2004, by the Gemini South telescope at Cerro Pachón in Chile, and will join the more than 100 images already available in the observatory's Image Gallery.
|The spiral galaxy NGC 6946 is ablaze with colorful galactic fireworks fueled by the births and deaths of multitudes of brilliant, massive stars. Credit: Gemini Observatory/Travis Rector, University of Alaska, Anchorage|
|NGC 2467, an extremely active star-forming region, shows almost every phase of the stellar birth process. Credit: Gemini Observatory/Travis Rector, University of Alaska, Anchorage|
In addition to housing many views of astronomical objects, the Gemini Image Gallery contains downloadable posters, illustrations, videos and animations, as well as multiple images of the twin telescopes themselves.
Gemini is an international partnership managed by the Association of Universities for Research in Astronomy under a cooperative agreement with the National Science Foundation.