Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2006 April 28
http://antwrp.gsfc.nasa.gov/apod ... 635_ddemartin_f.jpg
NGC 7635: 宇宙海洋中的气泡
Credit: Digitized Sky Survey, ESA/ESO/NASA FITS Liberator
Color Composite: Davide De Martin (Skyfactory)
Explanation: Seemingly adrift in a cosmic sea of stars and glowing gas, the delicate, floating apparition near the center (next to a blue tinted star) of this widefield view is cataloged as NGC 7635 - The Bubble Nebula. A mere 10 light-years wide, the tiny Bubble Nebula and the larger complex of interstellar gas and dust clouds are found about 11,000 light-years distant, straddling the boundary between the parental constellations Cepheus and Cassiopeia. Also included in the breathtaking vista is open star cluster M52 (upper left), some 5,000 light-years away. The digital color picture is based on photographic plates taken at the Palomar Observatory between 1992 and 1997. This cropped version spans about 2.7 degrees on the sky corresponding to a width of just over 500 light-years at the estimated distance of the Bubble Nebula.
Tomorrow's picture: polar ring galaxy
解释: 看起来星星和发光的气体都 漂浮在宇宙的海洋里, 精美, 如幻象般地漂浮在这张编号为NGC 7635- 气泡星云的广视野图片的中心附近 (在一个蓝色的恒星旁边) . 仅仅10 光年宽, 微小的泡影星云和更大的复杂的星际 气体和尘土 云被发现大约11,000 光年 之遥, 跨立在父母亲星座仙王座 和 仙后座之间. 还包括远方是壮观的疏散 星团M52 (上部左边), 大约相距5,000 光年。 数字 彩色图片是根据Palomar 观测所 在1992 年和1997 年之间的照相版拍摄的图片制作的。 这一切割不整齐的版本其在天空的间距大约2 .7 度对应于气泡星云的宽度刚好超过500 光年的估计距离..