Across
- 3. A galaxy that is circular or football in shape and looks like a frisbee or a disk. Contains mostly older stars.
- 4. The largest stars that give off the most energy or brightness.
- 6. None of the moon is visible
- 7. A galaxy that has arms that extend outward and spiral around from a main central area. Contains a lot of dust and gas and a mix of old and young stars.
- 11. The part of the lunar cycle when the moon appears to grow.
- 13. Twice a year when day and night are of equal length, occur on the first day of spring and autumn
- 16. A round rocky or gaseous object that orbits a sun (star)
- 19. Half of a sphere, like the Earth.
- 20. To orbit around an object, like the sun.
- 21. A rocky object that orbits a planet or dwarf planet
- 22. Allow for the transfer of energy in an up and down motion
- 24. 100% of the moon is visible
- 25. A small space rock that is moving through the solar system that has often broken off from an asteroid.
- 27. A galaxy with an unusual shape that does not fall into the elliptical or spiral categories.
- 29. A group of galaxies clustered or grouped together
- 31. A moon where more than half is visible.
- 32. Luminosity or brightness. Absolute magnitude is the actual brightness, Relative magnitude is the brightness compared to another star or due to a difference in distance.
- 33. A giant ball of burning gases that give off heat and light
- 36. To circle or revolve around
- 39. Half of the moon is visible
- 41. The attractive force, or pull, between object that have mass.
- 43. Energy transmitted in waves
- 45. A star that has collapsed under its own gravity after a super nova. The end of a massive star’s life cycle.
- 47. One complete trip around an object, like the sun.
- 48. The Earth is tilted on its axis at 23.5 degrees
- 49. One complete circle on an axis.
Down
- 1. A tide where the Earth, Moon and Sun form a 90-degree angle. These tides are less extreme than normal.
- 2. A large explosion that occurs when a massive star collapses upon itself as it ages.
- 4. A tide where the Earth, Moon and Sun are in a straight line. Due to additional gravity from the sun, the tides are more extreme than normal.
- 5. An area in space in which gravity’s pull is so strong that nothing can escape, not even light. Created when the most massive stars explode in a supernova. The end of the most massive star’s life cycle.
- 8. To spin on an axis
- 9. The distance from crest to crest (top of wave) or trough to trough (bottom of wave)
- 10. The number of waves that passes in a given time.
- 11. A type of star that has a high surface temperature but gives off less energy/has less luminosity than most other types of stars. The end of a small to medium mass star’s life cycle.
- 12. A large, irregularly shaped object made of rock that orbits our sun. Most exist in an asteroid belt in between Mars and Jupiter.
- 14. A moon where less than half is visible
- 15. A meteoroid that enters the Earth’s atmosphere
- 17. A large mass of dust and gas that will eventually pull together to form a star
- 18. The longest and shortest day that occur on the first day of winter and first day of summer.
- 23. Straight line through the center of an object
- 26. The horizonal circle around the middle of the Earth that divides it into two halves.
- 28. A type of star that is much larger and gives off more energy than an average sized star. Red giants have a lower surface temperature than blue giants.
- 30. The phenomenon where an object appears red as it moves away due to the stretching of light waves.
- 34. Brightness
- 35. The part of the lunar cycle when the moon appears to shrink
- 37. The theory that the universe began as a singularity that exploded and sent space, time and matter outward.
- 38. All of outer space and the matter and objects within in
- 40. An adult star in the longest part of its life cycle; tends to have a higher surface temperature as the star gets brighter.
- 42. A system of stars, dust and gas held together by gravity, often in a specific shape.
- 44. A star that has plants revolving around it.
- 46. A small, icy object made of ice and dust that has a long “tail” of gas. Comets have highly elliptical orbits around a sun.