Image Credit & Copyright: Dietmar
Hager, Torsten Grossmann
Explanation:
Big, beautiful spiral galaxy NGC 7331 is often touted as an analog to our own
Milky Way. About 50 million light-years distant in the northern constellation
Pegasus, NGC 7331 was recognized early on as a spiral nebula and is actually
one of the brighter galaxies not included in Charles Messier's famous 18th
century catalog. Since the galaxy's disk is inclined to our line-of-sight, long
telescopic exposures often result in an image that evokes a strong sense of
depth. The effect is further enhanced in this sharp image by galaxies that lie
beyond the gorgeous island universe. The background galaxies are about one
tenth the apparent size of NGC 7331 and so lie roughly ten times farther away.
Their close alignment on the sky with NGC 7331 occurs just by chance. Seen here
through faint foreground dust clouds lingering above the plane of Milky Way,
this visual grouping of galaxies is also known as the Deer Lick Group.
هیچ نظری موجود نیست:
ارسال یک نظر