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Exploring Space

TermDefinition
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