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Universe and Gravity
Question | Answer |
---|---|
Galileo Galilei | Italian astronomer and mathematician who was the first to use a telescope to study the stars, proved previous theories on Sun centered universe correct |
Nicholas Copernicus | He thought that the sun was the center & the plants went around the sun in circles |
Claudias Ptolemy | Ancient Greek Astronomer who could accurately predict the motion of the planets |
Edwin Hubble | person whom Hubble telescope is named after. he first classified galaxies by shape. |
Johanes Kepler | said that the planets orbit in ellipses rather than perfect cirlces |
Albert Einstien | Suggested the laws of physics were the same in the entire universe and believed in a finite universe |
red shift | a star moving away from earth that appears red |
blue shift | Stars moving towards the Earth appears blue |
gravity is based on | distance and mass |
the current scientific theory suggests that the universe is | expanding |
Big Bang Theory Evidence | 1. expansion of the universe 2. cosmic background radiation |
Why was the Big Bang not "Big?" | is started very small |
Why was the Big Bang not "Loud?" | there is no sound in space, no atmosphere for sound to bounce off of |
Steady State Theory | the universe has always existed and always will, in the state it is in now |
Main difference between Steady State Theory and Big Bang Theory | Big Bang says the universe began and will end, Steady State says the universe always has and always will exist |
The current scientific theory of the big bang inmplies that the universe is | finite |
There are three possible outcomes for the end of the universe | 1. It will expand forever 2. It will stop expanding 3. It will stop expanding and contract in on itself |
The Universe | Space and all the matter and energy in it |
Gravity | A force of attraction between objects that is due to their masses. |