. | . |
Hubble marks 30th anniversary with portrait of massive spiral galaxy by Brooks Hays Washington (UPI) Jan 6, 2020 The Hubble Space Telescope kicked off its 30th anniversary year with a new portrait of UGC 2885, a barred spiral galaxy that astronomers estimate is one of the largest in the local universe. The massive galaxy is 2.5 times wider than the Milky Way and hosts ten times as many stars, but astronomers refer to it as a "gentle giant" because it has been sitting quietly for billions of years, boasting only modest rates of star formation. The supermassive black hole at the center of UGC 2885 is also relatively quiet. Because its diet doesn't include much material from smaller satellite galaxies, the gentle giant must rely on its own internal hydrogen structures to fuel the birth of new stars. The barred spiral galaxy, positioned within the constellation Perseus, is also sometimes referred to as "Rubin's galaxy" -- named for the influential American astronomer Vera Rubin. "My research was in large part inspired by Vera Rubin's work in 1980 on the size of this galaxy," Benne Holwerda, astronomer at the University of Louisville who photographed the galaxy using the Hubble Space Telescope, said in a news release. "We consider this a commemorative image. The goal of citing Dr. Rubin in our observation was very much part of our original Hubble proposal." Astronomers remain somewhat befuddled by the massive size and quiet nature of UGC 2885. How did the spiral galaxy get so big while mostly avoiding violent collisions. "It's as big as you can make a disk galaxy without hitting anything else in space," said Holwerda. To find out how UGC 2885 got so big, Holwerda and his colleagues are surveying the globular star clusters located in the galaxy's halo, or along the spiral galaxy's outskirts. A large population of globular star clusters would suggest the galaxy swallowed up smaller satellite galaxies over many billions of years. In the future, scientists hope to survey the galaxy's center using the James Webb Space Telescope, set to launch in 2021.
NASA's Hubble survey's gigantic galaxy Baltimore MD (SPX) Jan 06, 2020 This majestic spiral galaxy might earn the nickname the "Godzilla Galaxy" because it may be the largest known in the local universe. The galaxy, UGC 2885, is 2.5 times wider than our Milky Way and contains 10 times as many stars. But it is a "gentle giant," say researchers, because it looks like it has been sitting quietly over billions of years, possibly sipping hydrogen from the filamentary structure of intergalactic space. This fuels modest ongoing star birth at half the rate of our Milky ... read more
|
|
The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us. |