Astronomy 1021- Midterm Exam Guide - Comprehensive Notes for the exam ( 14 pages long!)
5 Oct 2017
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Stars will blow much of their content back out into space: supernovae, galaxies function as cosmic recycling plants. The early universe contained of hydrogen and helium: we and the earth are made of: carbon, nitrogen, iron, and oxygen. Ancestors imagined earth to be stationary at the centre of a small universe: however we know now that it moves and rotates around the sun. Solar system consists of: planets and their moons, a star, and smaller objects like asteroids or icy comets. Our local supercluster is called laniaken which means immense heaven . Universe (or cosmos): the sum total of all matter and energy: is about 14 billion years old. Ly = light year: ly is a unit of distance, 1 ly = ct, c = speed of light and t = time, 9. 46 trillion km. Note: the farther away we look in distance, the further back we look in time.
