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unit 3 lesson 4
| Question | Answer |
|---|---|
| Terrestrial planet | Within the Solar System, the terrestrial planets are the inner planets closest to the Sun |
| Astronomical unit | a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun. |
| Prograde rotation | Having a rotational or orbital movement that is the same as most bodies within a celestial system. |
| Retrograde rotation | Retrograde motion is motion in the direction opposite to the movement of something else and the contrary of direct or prograde motion. |
| Gas giant | A gas giant (sometimes also known as a jovian planet after the planet Jupiter, gaseous giant, or giant planet) is a large planet that is not primarily composed of rock or other solid matter. |
| Planetary ring | A planetary ring is a disk or ring of dust, moonlets, or other small objects orbiting a planet or similar body. |
| Dwarf planet | a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such. |
| Kuiper belt | a region of the solar system beyond the orbit of Neptune, believed to contain many comets, asteroids, and other small bodies made largely of ice. |
Created by:
yamalis
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