Topic 7 – Astronomy Flashcards
Equation for weight
W=mg
Why do larger planets have rings?
Their gravity pulls debris
What are the two solar system models?
Geocentric and Heliocentric
What do the two models of the solar system state?
Geocentric - Everything orbits the earth
Heliocentric - Everything orbits the sun
What do the two models of the solar system state?
Geocentric - Everything orbits the earth
Heliocentric - Everything orbits the sun
What is the relation between distance from the sun and orbital speed?
Closer the planet is to sun, faster the orbital speed
What is red shift?
Shifting of spectral lines towards the red end of the spectrum
What is the relations between distance from earth and red shift?
Further away from earth, increase in red shift
How does red shift support The Big Bang?
Red shift shows there was a beginning to the universe
What is the Steady State Theory
As the universe expands, matter is constantly being made
What is all stars first form?
Protostar
How does a star form?
Nebulae, particle attraction form an equilibrium and star is formed
Why does a star eventually collapse?
It runs out of gas to fuse
What happens after a massive star collapse?
Increased pressure and temp. allows for fusion and a supernova to form
What happens after a normal star collapse?
Increased pressure and temp. allows for a weak fusion and a red giant forms but later cools into a white dwarf
