標題: 船帆座超新星爆炸遺骸 [打印本頁] 作者: charles 時間: 2009-3-27 11:05 標題: 船帆座超新星爆炸遺骸
Vela Supernova Remnant in Visible Light
影像版權: Digitized Sky Survey, ESA/ESO/NASA FITS Liberator
色彩合成: Davide De Martin (Skyfactory)
Explanation:
The explosion is over but the consequences continue. About eleven thousand years ago a star in the constellation of Vela could be seen to explode, creating a strange point of light briefly visible to humans living near the beginning of recorded history. The outer layers of the star crashed into the interstellar medium, driving a shock wave that is still visible today. A roughly spherical, expanding shock wave is visible in X-rays. The above image captures much of that filamentary and gigantic shock in visible light, spanning almost 100 light years and appearing twenty times the diameter of the full moon. As gas flies away from the detonated star, it decays and reacts with the interstellar medium, producing light in many different colors and energy bands. Remaining at the center of the Vela Supernova Remnant is a pulsar, a star as dense as nuclear matter that completely rotates more than ten times in a single second.
