Across
- 2. If a satellite accelerates its orbit becomes _______.
- 3. The type of nuclear reaction that occurs in stars
- 7. A force directed towards the centre of a curving motion.
- 9. The nearest main sequence star
- 12. An object that reaches ______ velocity will leave orbit.
- 14. The first stage of a star's lifecycle.
- 15. The moon is a _______ satellite.
- 17. An obejct leaving orbit travels at a _______ to its oringial orbit.
Down
- 1. The element that fuels most stars.
- 4. An object orbiting another body.
- 5. A space station is an ________ satellite.
- 6. Cosmic Microwave ________ radiation
- 8. The process that forms all elements heavier than iron.
- 10. A piece of evidence for the big bang.
- 11. ______ star: The left over core of a red supergiant.
- 13. A large collection of stars.
- 16. The edge of a black hole is the ____ horizon.