• Four of them, Beta, Alpha, Delta, and Epsilon are traveling eastwardly at various speeds, while the fifth, Gamma, moves in a westerly direction.
• But although the planetary paths might be roughly represented by a combination of circles, their speeds could not, on the hypothesis of uniform motion in each circle round the earth as a fixed body.

0. Word pronunciation is derived from article recording Binary star, License CC BY-SA 4.0
1. Word pronunciation is derived from article recording Bicycle, License CC BY-SA 4.0
2. Word pronunciation is derived from article recording Comet Shoemaker–Levy 9, License CC BY-SA 4.0
3. Word pronunciation is derived from article recording Asteroid belt, License CC BY-SA 4.0
4. Word pronunciation is derived from article recording Supermassive black hole, License CC BY-SA 4.0
5. Word pronunciation is derived from article recording Grim Fandango, License CC BY-SA 4.0
6. Word pronunciation is derived from article recording Compact Cassette, License CC BY-SA 4.0
7. Word pronunciation is derived from article recording Big Bang, License CC BY-SA 4.0