Words in this exercise:
| Word | Meaning |
| Albedo | the reflective power of a surface |
| Apastron | The point at which an object is farthest away from the centre of mass of the star it is orbiting. |
| Azimuth | direction of a celestial body from the observer |
| Black Hole | an area of immense gravity in space |
| Catena |
a line of craters along the surface of an astronomical body
|
| Constellation | a group of stars that forms a pattern |
| Cosmology | theory of the origin of the universe |
| Galaxy | any of the large systems of stars |
| Luminosity | the intrinsic brightness of an object |
|
Nova
|
star that is unexpectedly bright temporarily |
| Observatory | building for studying stars and planets |
| Photosphere | the lowest layer of the solar atmosphere |
