Physics, 23.11.2019 05:31, jaimes04

The following figures show the spectral types of four main-sequence stars. rank them based on the time each takes, from longest to shortest, to go from a protostar to a main-sequence star during the formation process.
longest to shortest time:
a. m6
b. g2
c. a5
d. o9

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The following figures show the spectral types of four main-sequence stars. rank them based on the ti...