Explanation: NGC 2997 is a grand design spiral galaxy. Its small nucleus and sprawling spiral arms give it a type "Sc" designation. NGC 2997 is speeding away from us at about 1100 kilometers per second, which would place it at about 55 million light years distant, given current estimates of the expansion rate of our universe. NGC 2997 is thought to have a mass of about 100 billion times that of our Sun, but is probably less massive than our own Milky Way Galaxy. NGC 2997 is not seen face-on - it is thought tilted by about 45 degrees. NGC 2997 is particularly notable for a nucleus surrounded by a chain of hot giant clouds of ionized hydrogen.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: spiral galaxy - spiral'naya struktura - spiral'naya galaktika - oblasti ionizovannogo vodoroda Publikacii so slovami: spiral galaxy - spiral'naya struktura - spiral'naya galaktika - oblasti ionizovannogo vodoroda
Sm. takzhe: NGC 1546 ot teleskopa im.Habbla Mess'e 66 krupnym planom NGC 4565: galaktika, vidimaya s rebra NGC 2403 v Zhirafe M100: galaktika s regulyarnym spiral'nym uzorom Licom k NGC 1232 Raskruchivaya M51 Vse publikacii na tu zhe temu >>