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Астронет: Астрономическая картинка дня M51: пыль и звезды в галактике Водоворот http://variable-stars.ru/db/msg/1211701/eng |
Credit & Copyright: N. Scoville
(Caltech), T. Rector
(U. Alaska, NOAO)
et al., Hubble Heritage Team,
NASA
Explanation:
The Whirlpool Galaxy is a classic spiral galaxy.
At only 30 million
light years distant and fully 60
thousand light years across,
M51, also known as
NGC 5194,
is one of the brightest and most
picturesque galaxies on the sky.
The above
image
is a digital combination of a ground-based image from the
0.9-meter telescope at
Kitt Peak National Observatory
and a space-based image from the
Hubble Space Telescope
highlighting sharp features normally too red to be seen.
Anyone with a good pair of
binoculars,
however, can see this
Whirlpool toward the constellation of Canes Venatici.
M51 is a
spiral galaxy of type Sc
and is the dominant member of a
whole group of galaxies.
Astronomers speculate that M51's
spiral structure is primarily due to its
gravitational interaction with a
smaller galaxy just off the top of this digitally sharpened image.
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.