天体尺度上的重大灾变事件——恒星的形成和归宿(上)

Major Catastrophes on the Scales of Celestial Objects——The Formation and Fate of Stars:Part 1

恒星之一生,长者可达几万亿年,短则不到一千万年,期间历经多次短时标的灾变事件,而此类事件出现前后,恒星多方面性质发生了非常剧烈的、甚至是根本性的改变。对此,天文学家已经有了较为充分的认识,但尚未完全洞悉其中之众多奥秘。

There happened a number of different catastrophic events for stars to evolve from its formation to final fate, among which the most violent one is the supernova explosion. A star that was, long ago or recently, born in an interstellar nebula has been evolving, from young to old, and may be ended with a supernova explosion, from which a huge amount of energy will be instantly released, and a white dwarf, neutron star or black hole can be produced, depending upon its mass.