English National Curriculum - Science
Mission Objectives
Describe the contents of the Solar system
Describe how the Solar system was formed
Explain why the Sun is stable
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Words and meanings to learn
protostar
a dense region of gas and dust in a nebula that is contracting under gravity, which will eventually become a star when nuclear fusion begins in its core
fusion
the nuclear reaction in which hydrogen nuclei combine to form helium nuclei, releasing energy that powers stars
main sequence star
a star in the stable phase of its life cycle in which the outward pressure from fusion balances the inward force of gravity
galaxy
a large system of stars, gas, dust, and dark matter bound together by gravity; the Milky Way is the galaxy that contains our Solar System
solar system
a collection of a star and the objects that orbit it, including planets, dwarf planets, moons, asteroids and comets
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