1.04, 1.18, 8.01-8.06 Motion in the universe
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4 Terms
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Universe meaning
A collection of billions of galaxies
2
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Galaxy meaning
A collection of millions or billions of stars
3
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Star meaning
A star is a celestial body that consists of a luminous sphere of plasma held together by its own gravitational field
4
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Solar system meaning
The collection of eight planets and their moons in orbit round the sun
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