Datei:Spiral Galaxy UGC 2885 (2020-01-4615).png

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Beschreibung	English: This Hubble Space Telescope photograph showcases the majestic spiral galaxy UGC 2885, located 232 million light-years away in the northern constellation Perseus. The galaxy is 2.5 times wider than our Milky Way and contains 10 times as many stars. A number of foreground stars in our Milky Way can be seen in the image, identified by their diffraction spikes. The brightest star photobombs the galaxy's disk. The galaxy has been nicknamed "Rubin's galaxy," after astronomer Vera Rubin (1928 – 2016), who studied the galaxy's rotation rate in search of dark matter.
Datum	5. Januar 2020, 20:15:00 (Hochladedatum)
Quelle	Spiral Galaxy UGC 2885
Urheber	, , and B. Holwerda (University of Louisville)
Andere Versionen	TIF version

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Fotograf	Space Telescope Science Institute Office of Public Outreach
Bildtitel	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 Way. In fact, its supermassive central black hole is a sleeping giant, too; because the galaxy does not appear to be feeding on much smaller satellite galaxies, it is starved of infalling gas.The galaxy has been nicknamed "Rubin’s galaxy," after astronomer Vera Rubin (1928 – 2016) by Benne Holwerda of the University of Louisville, Kentucky, who observed the galaxy with NASA's Hubble Space Telescope."My research was in a large part inspired by Vera Rubin's work in 1980 on the size of this galaxy." Rubin measured the galaxy's rotation, which provides evidence for dark matter, which makes up most of the galaxy's mass as measured by the rotation rate. "We consider this a commemorative image. This goal to cite Dr. Rubin in our observation was very much part of our original Hubble proposal."In results being presented at the winter American Astronomical Society meeting in Honolulu, Hawaii, Holwerda is seeking to understand what led to the galaxy's monstrous size. "How it got so big is something we don't quite know yet," said Holwerda. "It's as big as you can make a disk galaxy without hitting anything else in space."One clue is that the galaxy is fairly isolated in space and doesn't have any nearby galaxies to crash into and disrupt the shape of its disk.Did the monster galaxy gobble up much smaller satellite galaxies over time? Or did it just slowly accrete gas for new stars? "It seems like it's been puttering along, slowly growing," Holwerda said. Using Hubble's exceptional resolution, his team is counting the number of globular star clusters in the galaxy's halo— a vast shell of faint stars surrounding the galaxy. An excess of clusters would yield evidence that they were captured from smaller infalling galaxies over many billions of years.NASA's upcoming James Webb Space Telescope could be used to explore the center of this galaxy as well as the globular cluster population. NASA's planned Wide Field Infrared Survey Telescope (WFIRST) would give an even more complete census of this galaxy's cluster population, especially that of the whole halo. "The infrared capability of both space telescopes would give us a more unimpeded view of the underlying stellar populations," said Holwerda. This complements Hubble's visible-light ability to track wispy star formation throughout the galaxy.A number of foreground stars in our Milky Way can be seen in the image, identified by their diffraction spikes. The brightest appears to sit on top of the galaxy's disk, though UGC 2885 is really 232 million light-years farther away. The giant galaxy is located in the northern constellation Perseus.The Space Telescope Science Institute is expanding the frontiers of space astronomy by hosting the science operations center of the Hubble Space Telescope, the science and operations center for the James Webb Space Telescope, and the science operations center for the future Wide Field Infrared Survey Telescope (WFIRST). STScI also houses the Mikulski Archive for Space Telescopes (MAST) which is a NASA-funded project to support and provide to the astronomical community a variety of astronomical data archives, and is the data repository for the Hubble, Webb, Kepler, K2, TESS missions and more.
Kurztitel	NASA's Hubble Surveys Gigantic Galaxy
Namensnennung/Veröffentlicher	NASA, ESA, and B. Holwerda (University of Louisville)
Titel	NASA's Hubble Surveys Gigantic Galaxy
Quelle	STScI
Nutzungsbedingungen	http://hubblesite.org/copyright/
Erfassungszeitpunkt	4. Januar 2020
Farbraum	sRGB
Exif-Version	2.31
Bildbreite	9.917 px
Bildhöhe	7.438 px
Bits pro Farbkomponente	8 8 8
Höhe	7.438 px
Breite	9.917 px
Pixelzusammensetzung	RGB
Anzahl Komponenten	3
Horizontale Auflösung	72 dpi
Vertikale Auflösung	72 dpi
Kontaktinformationen	outreach@stsci.edu http://hubblesite.org 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444
Stichwörter	UGC 2885 Rubin's Galaxy
Datum, zu dem die Metadaten letztmalig geändert wurden	06:27, 18. Dez. 2019
Eindeutige Kennung des ursprünglichen Dokuments	04B8B623FD1166686EF2AF04AB5DD019
Speicherzeitpunkt	06:48, 17. Okt. 2019

Datei:Spiral Galaxy UGC 2885 (2020-01-4615).png

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PGC 14030

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