Astronomy Flashcards
Formula for weight?
W (N) = M (kg) x g (N/kg)
Two factors orbit is a combination of?
Force of gravity and speed of object
What happens to instantaneous velocity of a planet as the gravitational field strength from a star increases?
It increases
How did Galileo prove the geocentric model of solar system wrong?
Noticed some moons in a line near Jupiter. Looked again and noticed these ‘stars’ never moved away from J so not everything in orbit around earth
What does Steady State theory of universe say?
Universe has always existed and as it expands, new matter constantly made
What does Big Bang theory of universe say?
Initially, all mater in universe in very small space and then exploded, expansion still now
How does red-shift suggest universe is expanding?
The absorption spectrum measure from light from a distant galaxy is red shifted than one measured from earth as pattern shifted towards red end of spectrum
Two evidences to prove Big Bang theory?
Red shift and CMB
How does CMB prove big bang theory?
Shows universe had a beginning and that this energy created at beginning
