Across |
1. | A rocky body that reaches Earth without burning up completely. |
4. | The path that a body follows as it travels around another body. |
6. | A neutron star that spins rapidly and emits rapid waves of radio and optical energy. |
7. | The spin of a body on its axis. |
9. | A very luminous, starlike object that generates energy at a high rate. |
11. | A telescope that uses a curved mirror to gather and focus light from distant objects. |
13. | A collection of stars, dust, and gas bound together by gravity. |
15. | A telescope that uses a curved mirror to gather and focus light from distant objects. |
16. | The brightness that a star would have at a distance of 32.6 light-years from Earth. |
20. | A star which lies on the main sequence and is too small to be classified as a regular star. |
21. | A rare celestial phenomenon involving the explosion of most of the material in a star, resulting in an extremely bright, short-lived object that emits vast amounts of energy |
23. | The brightness of a star as seen from the Earth. |
24. | A cloud of interstellar gas and dust. |
25. | The time required for Earth to orbit once around the sun. |