Across
- 3. the region of the solar system beyond the orbit of Neptune; plutoids are located here. lunar resembling the moon
- 6. how long it takes an object to orbit another object
- 7. the oldest exposed areas of the Moon's surface, extensively cratered, chemically different, and higher in elevation than the maria.
- 10. the stage of a star when it has no more fuel for nuclear reactions
- 12. the name of the galaxy the Sun is a part of
- 13. the spectrum of wavelengths that our eyes can detect, including red, orange, yellow, green, blue,and violet
- 16. a crater that has central peaks and ejecta thrown out in long rays.
- 19. when Earth is exactly between the Moon and the Sun, and the Moon passes through Earth’s shadow.
- 23. a representation of thinking to help others understand your thinking
- 24. a Moon shape that is larger than a first or third quarter Moon but smaller than a full Moon
- 25. the assemblage of objects, distances, and directions that you use to establish the location of something.
- 26. the Earth’s natural satellite
- 28. each different shape of the Moon
- 29. an imaginary axle that a planet spins on.
- 30. a streak of light in the sky from gravel- and pebble-size meteoroids; also known as a shooting star
- 32. a planet orbiting a star other than the Sun.
- 34. the range of electromagnetic radiation arranged in order of energy level.
- 36. an object that orbits a star and is massive enough for its own gravity to force it into a spherical shape
- 37. a collection of interacting parts
- 38. traveling around something
Down
- 1. a theory that one explosion created the universe.
- 2. an object that orbits the Sun and is big enpugh to be round but doesnt clear away all objects near its orbit.
- 4. the reference star pointed to by Earth’s North Pole
- 5. a region of space occupied by a system of objects, including the Sun and all things orbiting it
- 8. a chunk of ice,dust, and rock material a few kilometers in size.
- 9. an enormous collection of tens of millions to hundreds of billions of stars, interstellar gas, and dust.
- 11. a day of the year when the Sun's rays shine straight down on the equator.
- 14. the path and length of time one object takes to travel around another object
- 15. the phase of the Moon that occurs when the Moon is opposite the Sun as seen from Earth.
- 16. a change in land created by an impact
- 17. a bright line of a spectrum, indicating the wavelength of emitted light.
- 18. a small,rocky object that orbits the Sun.
- 20. the remains of organisms that lived long ago preserved as oil,coal, or natural gas.
- 21. a layer of gases that surround an onject, held in place by gravity.
- 22. a cloud of gas and dust in space between stars
- 27. a small or medium-size piece of rock or metal from space
- 31. the sum total of all things that can be observed or detected
- 33. the stage of a star when it becomes very large and has a relatively cool nature.
- 35. the dark surface of cooled magma in a flooded crater