Test 2 Extra Questions Flashcards
What is a Type 1 Supernova?
Caused by a white dwarf.
What is a Type 2 Supernova?
Massive star caused it.
What is the Inflation Phase?
The universe growing exponentially in the first few moments after the big bang.
What is Nucleosynthesis?
Creating new atomic nuclei from pre-existing protons and neutrons.
What is Recombination?
Charged electrons first become bound to form electrically neutral hydrogen atoms 380,000 years after the big bang.
What are the Dark Ages of Astronomy?
Between big bang and formation of first stars.
What will happen to the Universe in the Future?
Only stars left will be red dwarfs.
What did LIGO Observe?
Merging of 2 black holes, 10x mass of the Sun.
What will happen to the Milky Way in the Future?
We will collide with the Andromeda galaxy.
Who were Blackholes Named After?
Roy Kerr.
What is the Range of Star Sizes?
0.1 to 100 times the Sun’s mass.
What Happens to Stars when Fuel runs out?
White dwarfs become black dwarfs.
What did Inflation Provide?
Smoothness and flatness.
How did Inflation Provide Smoothness?
Imperfections seem minuscule - billiard ball example.
How did Inflation Provide Flatness?
Blew up universe, so space-time’s curvature was diluted.
What Happened as a Result of Recombination?
Opaque plasma of the universe became transparent.
Where are Heavy Elements Formed?
Stars and Supernovae.
Who was the Meteorologist and physicist who gave the first Mathematical Description of the Big Bang?
Georges Lemaitre.
When did Inflation Happen?
10^-35 seconds after the big bang.
How fast do the Spiral Arms of a Galaxy Spin?
Slower.
How is Luminosity Related to Period for Cepheid Variables?
Increased luminosity = increased period.
How do we Use Cepheid Variables to Calculate Distance?
Very luminous and predictable - determine period, work out luminosity, use distance modulus equation to work out distance.
What is the Chandrasekhar Limit?
Maximum mass of white dwarfs.
What is the Large Scale Structure of the Universe?
Butterfly shaped - large voids with few galaxies in the middle.
Why did the Dark Ages of the Universe End?
The universe cooled enough for ions to recombine into atoms, allowing light to shine.
