1.
The force which brings two masses together
2.
A massive system containing billions of stars, planets, black holes, gas, and dust held together by gravity.
3.
The distance which light travels in space over one year
4.
An object with so much gravity not even light escapes
5.
The galaxy that contains the solar system
6.
The closest galaxy to the milky way
7.
A collection of dust and gas which is contracting
8.
A gaseous or rocky satellite of a star
9.
A group of galaxies which are pulled together by gravity
10.
Type of galaxy - looks like snail shell
11.
Type of galaxy; squashed circle
12.
The part of the galaxy with the most gravity
13.
The outermost part of a galaxy
14.
The centre of a black hole
15.
The stretching of matter into thin strips inside a black hole
16.
The point of no return for a black hole
17.
Spinning disc of gas and dust swirling around a black hole's event horizon
18.
An indigenous constellation used for harvesting eggs at a particular time of year
19.
A natural satellite that orbits a planet.
