Our Universe

2. The wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum
3. The colossal explosion of a star
5. The moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded.
7. A small very dense star that is typically the size of a planet.
10. All physical matter, including all the stars and planets in space.
11. Our galaxy, it is a spiral galaxy.
12. A substance that is in a vaporous state of matter, that mostly consists of hydrogen and helium.
13. A galaxy typically has a rotating disc with 'arms' that curve out from a dense central region.
14. A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

1. A giant cloud of dust and gas in space
4. The measurment scientests use to measure the distance of things in space.
6. A galaxy that does not have a distinct regular shape
8. Small grains of carbon, silicon, iron, aluminium and other elements 5that can be found in the galaxy.
9. A type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image.
13. A luminous ball held together by its own gravity.