a solid object moving in space that is smaller than an asteroid

a natural object that orbits around another objec tin space

the orbit or rotation of a planet or planetary satellite in a reverse direction from that normal in the solar system

to turn or spin around a center point or line

to move in a circle or oval around a central object

to travel around something in a curved path

anything that has mass and takes up space

the distance from the Earth to the Sun

an uncrewed vehicle that travels to and obtains information about objects in space

a proper distance from the Sun that allows for liquid water

a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacraft

the study of the origin, development, distribution, and the future of the life of the universe

the imaginary straight line that something turns around

a mostly rocky and metal object that orbits the sun

a large, round object in space that travels around a star

a vehicle propelled by the exhaust made from a burning fuel

all of space and everything in it including stars, planets, galaxies, etc...

a planet similar in size or composition to the Earth, especially being on of the four inner planets of our solar system

a system of planets or other bodies orbiting another star

a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy

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