Email Print Share

News Release 05-002

A Stellar Debut for Gemini Observatory's Online Image Gallery

The Fireworks Galaxy

The spiral galaxy NGC 6946 is ablaze with colorful galactic fireworks.


January 10, 2005

This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.

 

Mauna Kea, Hawaii--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.

Indeed, for reasons that are still not clear, NGC 6946 is among the most prolific galaxies known for star birth and star death alike.

The other two images 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.

One shows a pair of interacting galaxies located about 55 million light-years from Earth in the direction of the southern constellation of Eridanus. The larger of the two, NGC 1532, is a spiral galaxy much like our own Milky Way. Seen nearly edge-on, its dusty spiral arms, lined with reddish star-forming regions in the foreground, are silhouetted against the galactic disk. Likewise, the smaller galaxy, NGC 1531, resembles our galaxy's biggest companion, the Large Magellanic Cloud. Hints of interaction between these galaxies are seen in at least two stray associations of stars, and glowing red clumps of hydrogen gas.

The last image shows NGC 2467, one of the Milky Way's most active stellar nurseries. Located in the southern constellation of Puppis, NGC 2467 illustrates many phases of star birth at once. In the lower right, the brilliant light of newborn stars causes the surrounding gas to glow and evaporate, revealing knots of denser gas and dust where an even younger generation of stellar siblings is about to be born. The dust lanes and dark globules of gas in the center are left over from an earlier burst of star formation. The cluster of slightly older stars to the left emerged from the region several million years ago.

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.

-NSF-

Media Contacts
M. Mitchell Waldrop, NSF, (703) 292-8070, email: mwaldrop@nsf.gov
Peter Michaud, Gemini Observatory, (808) 974-2510, email: pmichaud@gemini.edu

The U.S. National Science Foundation propels the nation forward by advancing fundamental research in all fields of science and engineering. NSF supports research and people by providing facilities, instruments and funding to support their ingenuity and sustain the U.S. as a global leader in research and innovation. With a fiscal year 2023 budget of $9.5 billion, NSF funds reach all 50 states through grants to nearly 2,000 colleges, universities and institutions. Each year, NSF receives more than 40,000 competitive proposals and makes about 11,000 new awards. Those awards include support for cooperative research with industry, Arctic and Antarctic research and operations, and U.S. participation in international scientific efforts.

mail icon Get News Updates by Email 

Connect with us online
NSF website: nsf.gov
NSF News: nsf.gov/news
For News Media: nsf.gov/news/newsroom
Statistics: nsf.gov/statistics/
Awards database: nsf.gov/awardsearch/

Follow us on social
Twitter: twitter.com/NSF
Facebook: facebook.com/US.NSF
Instagram: instagram.com/nsfgov