The theory that the solar system evolved from a hot gaseousnebula.
太阳系是产生于一个星云热气体的理论。
2
The Double Helix Nebula is a gaseousnebula near the center of our galaxy.
双螺旋星云是一个气态星云，靠近银河系中心。
3
'They recorded the history of the solar system before any of the planets formed, and were the first solids to condense out of the gaseousnebula surrounding our protosun.'