Astro Questions Flashcards
(25 cards)
What are the three types of main sequence stars
Massive star
Brown Dwarf
Low mass Star
What does a massive star become when it starts to die
Red Supergiant
What does a low mass star become when it starts to die
Red Giant
What happens when a red supergiant dies
Supernova
What happens when a red giant dies
White Dwarf
Planetary Nebula
What comes after a supernova
Supernova remnant
Black hole
Neutron star
What happens to a planetary nebula
White dwarf
What can a neutron star become
Pulsar
What can a black hole become
x-ray emission
What does a white dwarf become
Supernova
Nova
What can a nova become
White dwarf
How long ago did the big bang happen
13.77 bill years ago
what happen t=1/10^43 sec after the big bang
Time and space begun
temp was 1mill trill trill degrees celcius
what happen t=1/10^34 sec after the big bang
Matter such as positron and electrons formed
Particles collided causing the first light in the universe
what happen t=1/10^4 sec after the big bang
Protons and neutrons formed due to collisions of particles
what happen t=1/100 sec after the big bang
Expanding and cooling rapidly
what happen t=1 sec after the big bang
The universe was probably more than trill trill km across
temp 10 bill degrees Celsius
what happen t=5 min after the big bang
Nuclei of Hydrogen, helium, lithium formed
what happen t=300000 years after the big bang
about 1/1000 of its current size
temp 3000 degrees Celsius
First atoms formed
Universe was dark
what happen t=200 000 000 years after the big bang
First stars formed
Nuclear reaction happened within stars
planets started to form from heavier nuclei
what happen t=1 000 000 000 years after the big bang
The first galaxies formed
Proof of the big bang
Red Shift
Cosmic Microwave Background radiation
How does a star start to form
Star formation begins when hydrogen gas is pulled
into a dense ball by gravity.
What happens in a main sequence star
The compression of hydrogen in a protostar
continues for hundreds of thousands of years.
When the temperature reaches 13 million
degrees Celsius, nuclear fusion begins.
