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How much mass was there in the protoplanetary disk out of which the planets formed, compared to the mass of the Sun?

Answer 1

The mass of the protoplanetary disk was about #2*10^30Kg#, the mass of the Sun is about #1.989*10^30Kg#.

The mass of the solar system, and hence the protoplanerary disk, is about #2*10^30#Kg. The Sun at #1.989*10^30Kg# contains #99.89%# of the solar system's mass.

Of the remaining mass the four gas giants Jupiter, Saturn, Uranus and Neptune make up #99%#. The other #1%# is the combined mass of the rocky planets, asteroids, comets and dust and gas.

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Answer 2

Matthew Arnold

Roughly 2% of the Sun's mass was contained in the protoplanetary disk.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.