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Bubble Nebula

NGC 7635

C11 EmissionNebula Cassiopeia 관측 가능 난이도 6 Professional/Research - Benefits from UHC/H-alpha filter
Credit: NASA, ESA, Hubble Heritage Team. License: Public domain. (Wikimedia Commons)
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특성

등급 11.0
각크기 15.0′ × 8.0′
거리 11000 ly
Emission Nebula [Distance: 11000 ly]

위치 & 식별자

RA 23h 13m 40.1s
Dec +61° 12' 00.0"
별자리 Cassiopeia
카탈로그 C11

가시성

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Bubble Nebula 소개

설명

The Bubble Nebula (NGC 7635) is an emission nebula in Cassiopeia, about 7,100 light-years away. The bubble is created by the stellar wind from the massive O-type star SAO 20575 (BD+60 2522), which blows a shell of gas about 10 light-years across.

관측 팁

The bubble itself is very faint visually; at least an 8-inch telescope with an OIII or UHC filter is needed to see more than the bright star. Larger apertures (12-inch+) begin to reveal the arc of the bubble. Best in autumn evenings.

역사

Discovered by William Herschel in 1787. The Bubble Nebula gained fame through Hubble Space Telescope imagery that revealed its nearly perfect spherical shell in stunning detail.

재미있는 사실

The bubble is being inflated by a star 10-20 times more massive than the Sun with a surface temperature of 37,500 K. The bubble is not perfectly centered on the star because the surrounding interstellar medium is denser on one side.

커뮤니티 사진 (1)

Credit: NASA, ESA, Hubble Heritage Team. License: Public domain. (Wikimedia Commons)

Credit: NASA, ESA, Hubble Heritage Team. License: Public domain. (Wikimedia Commons)

Skybred Mar 2, 2026