P2h-the Big Bang Flashcards
What is microwave radiation?
Radiation that is received from all parts of the universe
What is red shift?
When light from other galaxies are shifted to the red end of the spectrum
What does the red shift of distant galaxies tell us?
Distant galaxies have greater red shifts which means they are moving away faster than nearer ones
How does the big bang theory let us guess the age of the universe?
The rate of reaction lets us guess the age of the universe
What is the big bang theory?
The universe started with an explosion
The universe is still expanding
What is the life cycle of a small star?
Clouds of dust and gas Protostar Main sequence star Red giant Planetary nebula White dwarf
What is the life cycle of a large star?
Clouds of dust and gas Protostar Main sequence star Red giant Red supergiant Supernova Neutron star or black hole
What is the life history of a star?
Interstellar gas cloud
Gravitational collapse producing protostar
Thermonuclear fusion
Long period of normal life(main sequence star)
End depends on mass
What are the properties of a black hole?
Large mass
Small volume
High density
Strong gravitational attraction due to mass
What is the geocentric/ptolemaic model?
Sun, moon, planets and stars all orbit the earth in perfect circles
What is the heliocentric/copernican model?
The earth and planets all orbit the sun in perfect circles
How did technological advances help Galileo?
He used a telescope, a new invention
He saw moons orbiting jupiter which shows not everything orbited the earth
He saw the phases of venus which shows venus orbited the sun
Why were the copernicus and Galileo models controversial?
Other models around for longer
Model condemned by church, went against bible
