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Exploring Space
| Term | Definition |
|---|---|
| satellite | A satellite is something small or less powerful that orbits around something bigger. It often describes a body in space, such as an artificial satellite that orbits the Earth and beams down signals that power devices like cell phones. |
| spacecraft | a craft capable of traveling in outer space; technically, a satellite around the sun |
| space exploration | the investigation of the space using telescopes, satellites, space probes, spacecraft, and associated launch vehicles. |
| telescope | an instrument that is used to view distant objects. If you want to look at the planets, you can use a telescope. |
| astronomer | A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars |
| galaxy | a collection of stars and planets that are held together by gravity |
| solar system | a group of planets and other bodies that revolve around a star |
| revolution period | the movement of one object around a center or another object |
| asteroid | a large, irregularly shaped object in space that orbits our Sun |
| comet | a small, icy object that orbits the sun and has a long "tail" of gas |
| dwarf planet | Similar to the solar system’s eight planets but are smaller. Like planets, they are large, roundish objects that orbit the Sun but that are not moons |
| meteor | a space rock that hits the atmosphere of the Earth. |
| planet | a celestial body that revolves around a star |
| star | a celestial body of hot gases radiating energy |
| model | a representation of something (sometimes on a smaller scale) |
| proportion | the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree |
| scale | the ratio between the size of something and a representation of it |
| diameter | the length of a straight line passing through the center of a circle and connecting two points on the circumference |
| nuclear fusion | a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy |
| nuclear reaction | a process that alters the energy or structure or composition of atomic nuclei |
| sun | the star that is the source of light and heat for the planets in the solar system |
| gravitational force | the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface |
| magnetic force | attraction for iron |
| electromagnetic | pertaining to or exhibiting magnetism produced by electric charge in motion |
| magnetic fields | the lines of force surrounding a permanent magnet or a moving charged particle |
| attraction | the force by which one object attracts another |
| gravity | the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface |
| mass | the quality that gives things weight anywhere there's gravity |
| force | a physical energy that can be seen or felt |
| weight | the heaviness of a person or object |
Created by:
sbarone
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