Show:
Becoming a Star
Low/Medium Mass Stars
They Might Be Giants
Small Deaths
Catastrophic Deaths
100
This is what causes nucleosynthesis.
What is extremely high temperatures and pressures in the cores of stars ignite nuclear fusion.
100
This is the lowest mass that a star can fuse hydrogen in its core.
What is 0.08 solar masses?
100
This is the reason most of the stars in our night sky are giants.
What is they are much brighter (higher luminosity) than other stars?
100
When a white dwarf pulls enough mass onto it, the hydrogen will ignite, blowing the mass into space, creating one of these.
What is a nova?
100
These are the type of elements created in a supernova.
What are heavy elements (heavier than Iron on the periodic table)?
200
These are two ways star formation can be triggered.
What is any two of the following: shock waves from a supernova, intense light from an O or B star, or interstellar clouds colliding?
200
This is the lowest temperature required for nuclear fusion.
What is 10 million K?
200
This is why stars generally move toward the red part of the color spectrum when they become giants.
What is as the stars expand, they cool down and become redder?
200
This is the reason Type Ia supernovae can be used to determine distances to objects in our universe.
What is they all peak at the same absolute brightness?
200
This is the direct evidence we have that supernovae have occurred in the past.
What is the glowing gas they leave behind (as the molecules are ionized by the expanding shell of energy)?
300
This is the main difference between a protostar and a pre-main-sequence star.
What is a protostar is just accreted matter, but a pre-main-sequence star emits enough outward pressure to stop the accretion process.
300
These are the masses of stars which undergo a helium flash and eventually become giants.
What is 0.4 to 2 solar masses?
300
These are the stars which will eventually become supergiants.
What are high mass stars (greater than 8 solar masses)?
300
This is what a planetary nebula is.
What is the gas/dust ejected by a low/medium mass star upon its death?
300
This is how a magnetar is different than a typical pulsar.
What is its magnetic field is 1000 times greater than a typical pulsar (and they emit x-rays and gamma rays due to energy released)?
400
This is what Bok Globules have to do with star formation.
What is they are the dark regions in a molecular cloud where it has collapsed and star formation has begun?
400
This is how stars with more than two solar masses deal with helium fusion.
What is they fuse helium smoothly (no flash) and reach equilibrium easily?
400
In a Type Ia Supernova, one of the stars is a white dwarf. This is the type of star the other one is.
What is a giant (or red giant, or a super giant)?
500
This is what the T Tauri stage of star formation does.
What is the star ejects mass in opposite directions, clearing the nebula around it, sending a shock wave outwards from its center.
500
This is why our sun is considered a Population I star.
What is it is a metal-rich star?
500
Once an intermediate mass star begins its second expansion, it will become this before it blows up.
What is an AGB (or an asymptotic giant branch) star?