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Molecular Clouds
Fusion
Sun-sized Stars
Massive Stars
Weird Stuff
100
This is the maximum temperature of a molecular cloud.
What is 50K?
100
This element is fused into helium along the main sequence.
What is hydrogen?
100
This is the maximum mass a star can have with certainty that it will evolve into a giant.
What is 2 solar masses?
100
This is the minimum mass a star must have in order to evolve into a supergiant.
What is 8 solar masses?
100
This is the name given to an object that is a rotating neutron star.
What is a pulsar?
200
If a molecular cloud's mass exceeds this quantity, gravitational collapse of this cloud occurs.
What is Jeans mass?
200
Giant stars fuse this element after all of their hydrogen is burned up.
What is helium?
200
Stars remain on the main sequence for approximately this percentage of their lifetime.
What is 90%?
200
This is the numerical value of the Oppenheimer-Volkov limit.
What is 3 solar masses?
200
This is the bright flashing that occurs as a result of a white dwarf gaining mass from its companion star.
What is a nova?
300
The collapse of a molecular cloud can be caused by a nearby exploding star, or by this.
What is collision between clouds?
300
Giant stars can only fuse out to this element.
What is oxygen?
300
This cataclysmic astrophysical event occurs when a white dwarf exceeds its Chandrasekhar mass limit.
What is a Type Ia Supernova?
300
Should a neutron star exceed the Oppenheimer-Volkov mass limit, the remaining material will become this.
What is a black hole?
300
White dwarfs are supported entirely by this pressure.
What is electron degeneracy pressure?
400
This is what a "baby" star is called.
What is a protostar?
400
During star formation, outward radiation pressure from fusion on the main sequence causes this event.
What is halting of collapse?
400
DAILY DOUBLE: What is your wager?
What is a red giant, in 5 billion years.
400
A type II supernova is caused by these forcing themselves into nuclei, resulting in a violent, eruptive astrophysical event.
What are electrons?
400
The mass of a white dwarf is about the same as the Sun, but its radius is comparable to this astrophysical body.
What is the Earth?
500
These objects are regions of star formation in which many molecular clouds exist.
What is a nebula?
500
Supergiants can fuse elements as massive as this one.
What is iron?
500
When the core of a red giant reaches this temperature, helium starts fusing into heavier elements.
What is 10^8 K?
500
Stars of this initial mass are doomed to become black holes.
What is 20 solar masses?
500
The mass of a neutron star, on average, is approximately 1.5 times that of the Sun, but its diameter is approximately this.
What is 12 miles?