Astronomy Crossword

4. the moment when a celestial object crosses the meridian and is thus at its highest above the horizon.
7. the point in the sky that’s directly overhead.
8. object an entry in a catalog of 103-star clusters, nebulas, and galaxies
10. the distance that light travels in one year.
11. the line on the Moon or a planet that divides the bright, sunlit part from the part in shadow.
12. the brightness on the moon gets bigger.

1. timetable with celestial coordinates that indicate where a planet, comet, or other body moving in relation to background stars will be in the sky.
2. a device that can be adjusted to show the appearance of the night sky for any time and date on a round star map
3. avast collection of stars, gas, and dust, typically 10,000 to 100,000 light-years in diameter and containing billions of stars.
5. great clouds of glowing gas, lit up by stars inside or nearby.
6. Time the measure of time by the stars.
9. the measure of how much an orbit deviates from being circular.