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C30

NGC 7331

은하 우수 (69/100)

Barred Spiral

C30 Galaxy Pegasus 관측 가능 난이도 4 Large telescope (10"+) - Dark skies recommended
Credit: Ngc1535. License: CC BY 3.0. (Wikimedia Commons)
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특성

등급 9.5
각크기 9.3′ × 3.8′
위치각 170°
거리 49000000 ly
은하 유형 Barred Spiral (Sbc)
Spiral Galaxy [Distance: 49000000 ly]

위치 & 식별자

RA 22h 37m 04.1s
Dec +34° 25' 01.2"
별자리 Pegasus
카탈로그 C30

가시성

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C30 소개

설명

NGC 7331 is a bright spiral galaxy in Pegasus, about 40 million light-years away. Often called the Milky Way's twin, it is a large, inclined spiral with a prominent bulge and well-defined dust lanes. It appears to lead a small group of background galaxies known as the Deer Lick Group.

관측 팁

One of the brighter non-Messier galaxies, visible in a 4-inch telescope as an elongated glow with a bright core. An 8-inch scope shows the disk and hints of dust lanes. The four smaller background galaxies require 10 inches or more. Best in autumn.

역사

Discovered by William Herschel on September 5, 1784. The group of background galaxies (NGC 7335, 7336, 7337, 7340) was once thought to be physically associated but lies 10 times more distant.

재미있는 사실

NGC 7331 rotates in the opposite direction from what its spiral arm winding would suggest, a phenomenon called "backwards spinning" that remains unexplained.

커뮤니티 사진 (1)

Credit: Ngc1535. License: CC BY 3.0. (Wikimedia Commons)

Credit: Ngc1535. License: CC BY 3.0. (Wikimedia Commons)

Skybred Mar 2, 2026