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Origins of a Star
Low-mass Stars
Medium-mass Stars
Massive Stars
Miscellaneous
100
All stars are formed within a ...
What is molecular cloud
100
Low mass stars can fuse a certain element for trillions of years.
What is hydrogen.
100
remain in the main sequence for approximately 11 billion years.
What is a medium-mass star
100
Massive stars have the ______ lifespan on the main sequence.
What is shortest
100
Have extremely high pressure causing them to be very dense and very hot.
What is a neutron star
200
They can fuse deuterium.
What is a brown dwarf
200
The initial thermal energy is very high which is why they are so bright and have a blue colour. Since they have no way of maintaining this energy they will slowly redden in colour until they are no longer visible
What is a white dwarf.
200
Most common form of red giants
What is a red branch giant stars
200
They burn out their main fuel source more quickly than other stars.
What is a massive star
200
regions of space time in which nothing can escape from not even light.
What is a black hole
300
All stars are formed in a giant molecular cloud. Gravity forces this cloud to collapse into clumps of matter from which stars form. Eventually enough gas and dust is collected in a giant ball with high enough temperature and pressure that hydrogen atoms are able to fuse together.
What is a protostar
300
These stars cannot fuse helium when its hydrogen fuel source has been depleted its core will become stagnant.
What is a low-mass star.
300
All ___ _______ eventually fuse their resources too thin and the core collapses producing a planetary nebula and a white dwarf.
What is a red giant
300
Massive stars fuse helium into carbon and oxygen just like red giants but then continue into much heavier elements all the way to which element.
What is iron
300
They are the most luminous objects in the universe.
What is a quasar
400
The process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the least massive, which is considerably more than the age of the universe).
What is Stellar Evolution
400
None of these are thought to exist because of the insufficient time the universe has been around to form one.
What is a black dwarf.
400
At the end of the medium-mass stars time span there is how many scenarios that could happen?
What is 2
400
Once the core reaches a certain mass, the iron can no longer sustain its own mass and the star will collapse causing a _______.
What is a supernova
400
Some neutron stars have so much energy expelling from their cores that they begin to spin and can rotate several hundred times per second. When the radiation faces us we see it as a blink or a pulse.
What is a pulsar
500
For a new star to form there must be equal amounts of gravitational force pushing matter to the core of the star and energy released from nuclear fusion acting against this gravity.
What is Stellar Equilibrium
500
If the core does not have any layers of hydrogen it will contract until ______ ______ ______ causes it to collapse and form a white dwarf.
What is electron degeneracy pressure
500
These red giants have enough mass and temperature that once they have expanded and have a helium core they begin to undergo helium fusion making elements such as carbon, oxygen then possibly neon.
What is an asymptotic giant branch stars
500
At the moment massive stars expel the little hydrogen left into a shell surrounding the core it has enough pressure and high enough temperatures to begin fusing what element?
What is helium
500
It is believed that at the center of our galaxy there is a super massive black hole like this with a mass of __ ______solar masses
What is 4 million