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The Question

(Submitted April 26, 1999)

Inside a nebula, how big are the immense balls of dust and gas before they become stars?

The Answer

That is a very good question.

The "proplyds" or protoplanetary disks, as these systems are called, seem to be a few (about 5-8) times larger than our solar system.

For more information take a look at: http://antwrp.gsfc.nasa.gov/apod/ap961017.html

Hope this helps,
Mike Arida
for Ask an Astrophysicist

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