ASTR 105 Lecture Notes - Lecture 16: Cosmetology, Pseudoscience, Chankillo

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25 May 2018

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Lab AST 105 Lecture Notes 16:

• Astronomy

• The scientific study of the universe

• planet

• A large object that moves around a star in a regular pattern and does not emit light

• moon

• A natural satellite that revolves around a planet.

• star

• A giant ball of hot gas, in space, mainly composed of hydrogen and helium and doing

fusion

• solar system

• The system consisting of the sun and the planets and other objects that revolve around

it.

• light-year

• the distance light travels in one year

• galaxy

• A collection of stars, dust, and gas bound together by gravity

• gravity

• A force of attraction between objects that is due to their masses.

• constellation

• A pattern or grouping of stars that people imagine to represent a figure or object.

• astrophysics

• Branch of physics dealing with the composition of celestial bodies

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