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4th Solar System
| Term | Definition |
|---|---|
| galaxy | A galaxy is a large group of stars, dust, gas and dark matter held together by gravity |
| Composition | what something is made of, its parts |
| constellation | a group of stars that make an imaginary shape in the night sky |
| Ursa Major | a north polar constellation and the third largest constellation in the sky |
| Ursa Minor | the group of stars in the northern sky that includes the stars that form the Little Dipper |
| Dipper | A cluster of seven stars in the constellation Ursa Major, four forming the bowl and three the handle of a dipper-shape |
| Orion | a constellation on the equator east of Taurus; contains Betelgeuse and Rigel |
| Astronomy | the study of the Universe and the changes that take place in and around all objects moving through space |
| telescope | a device shaped like a long tube that you look through in order to see things that are far away |
| Astrolabe | a device that measures the distance from a star to the horizon |
| compass | A magnetic compasscontains a magnetized needle that swings on a pin to point north |
| sextant | a device that measures the angles between stars |
| rotation | a turning around as on an axis |
| ocean tide | the rising and falling of the sea due to the pull of gravity from the sun and moon |
| axis | a real or imaginary line on which something rotates |
| shadow | A dark area or shape made by an object blocking rays of light |
| tilt | pitching dangerously to one side |
| Revolution | the movement of one object around a center or another object |
Created by:
Richardson's Rainbow Readers
Popular Earth Science sets