AST101 Exam notes.docx

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Department
Astronomy & Astrophysics
Course
AST101H1
Professor
prof
Semester
Fall

Description
AST101 State the cosmic address. Universe, Local Supercluster, Local Group, Milky Way Galaxy, Solar System, Earth What are..? Astronomical Units (AU): Earth’s distance from the Sun, approximately 150 million km Light-year (ly): distance that light can travel in 1 year. Light takes 1 second to reach Earth from the Moon and 8 minutes to reach Earth from the Sun. Star: a large glowing ball of gas that generates heat and light through nuclear fusion as its core. The Sun is a star. Planet: moderately large object that orbits a star, large enough for its own gravity to make it into a round shape and has cleared most other objects from its path. Asteroid: relativel
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