ASTR BC 1753x Lecture Notes - Lecture 3: Pseudoscience, Scientific Method, Deferent And Epicycle

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1. 5 earth mass planet around a red sun. Maybe there is only one way for intelligent life to evolve- under the conditions of earth or earth-like places. The force of gravity on his planet is greater than ours, so he evolved under more pressure. All stars appear to rotate around the n celestial pole. The constellation orion is visible on winter nights but not summer nights because . Earth"s location in its orbit with respect to the sun has changed. The tilt of the earth relative to the sun. During the spring and fall equinox, the hemispheres are receiving equal amounts of sunlight. It was hit by a giant asteroid at early times. Although the solstice is considered the first day of summer, it takes time for the more direct sunlight to heat u land and water. Small variation for earth about 3% (but distance does matter for some other planets like mars and pluto)

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