Scientists estimate solar nebula's lifetime

ENN
Feb 9, 2017, 3:36 pm83 pts
About 4.6 billion years ago, an enormous cloud of hydrogen gas and dust collapsed under its own weight, eventually flattening into a disk called the solar nebula. Most of this interstellar material contracted at the disk’s center to form the sun, and part of the solar nebula’s remaining gas and dust…

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