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5.

a rotating cloud of gas and dust from which the sun
and planets formed.
6.
a disk of gas dust orbiting a newly formed star, from
which planet may eventually form.
7.
the average distance between Earth and the sun;
approximately 150 million kilometers. (symbol, AU)
8.
a collection of stars, dust, and gas bound together by
gravity.
9.
space and all the matter and energy in it.
10.
the distance that light travels in one year; about 9.46
trillion kilometers.

1 answer

Here are the answers to your clues:

  1. Solar Nebula - a rotating cloud of gas and dust from which the sun and planets formed.

  2. Protoplanetary Disk - a disk of gas and dust orbiting a newly formed star, from which planets may eventually form.

  3. Astronomical Unit (AU) - the average distance between Earth and the sun; approximately 150 million kilometers.

  4. Galaxy - a collection of stars, dust, and gas bound together by gravity.

  5. Universe - space and all the matter and energy in it.

  6. Light-Year - the distance that light travels in one year; about 9.46 trillion kilometers.