Question

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.

Answer 1

Here are the answers to your clues:

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

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

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

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

9. **Universe** - space and all the matter and energy in it.

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