This is the energy produced when 9 kg of mass are converted into energy.
What is 8x10^17 J?
100
The name given to a young star that is still gathering mass from its molecular cloud.
What is a protostar?
100
This is the process that low mass main sequence stars use to convert hydrogen into helium.
What is the proton-proton chain?
100
At the end of the supergiant stage of a massive star's life, this violent explosion produces a brilliant glow that can last for weeks.
What is a supernova?
100
A region in space created by a stellar collapse characterized by gravitational forces so strong that not even light can escape.
What is a black hole?
200
This is the energy produced by the sun during this 90 minute class period.
What is 2x10^30 J?
200
One of the four fundamental forces, responsible for the collapse of the gas cloud that forms a star.
What is gravity?
200
The most abundant element in the human body and the nuclear fuel that powers main sequence stars.
What is hydrogen?
200
These tiny particles are released at near the speed of light when electrons fuse with protons during the collapse of the core of a supergiant star.
What are neutrinos?
200
The hot remains of the core of a low mass star that has reached the end of its life.
What is a white dwarf?
300
This is the distance (in parsecs) to a star with parallax angle of 0.05 arcseconds.
What is 20 pc?
300
A protostar becomes a main sequence star when this characteristic is met.
What is steady nuclear fusion?
300
This is the correct order of the life stages of a low mass star.
What is: protostar, main sequence, red giant, planetary nebula/white dwarf?
300
This is the correct order of the life stages of a massive star.
What is: protostar, main sequence, supergiant, supernova, and neutron star or black hole?
300
This physical phenomenon will keep a white dwarf from collapsing under its own gravity.
What is electron degeneracy pressure?
400
This is the luminosity of a star with apparent brightness of 1x10^ - 8 W/m^2 and distance 9x10^17 m.
What is 1x10^29 W?
400
The requirements for the minimum mass that a molecular gas must have in order to form stars depends on the temperature of the gas and this other physical property.
What is density?
400
The late life stage of a low mass star characterized by a large, bloated radius and high luminosity.
What is a red giant?
400
The production of this heaviest element in the core of a massive star signals its inevitable collapse.
What is iron?
400
This physical phenomenon will keep a neutron star from collapsing under its own gravity.
What is neutron degeneracy pressure?
500
Star A appears this many times brighter than Star B, given that Star A is 4 times farther from Earth and 2 times more luminous than Star B.
What is 1/8?
500
This is the minimum mass of a star-forming gas cloud, in units of solar mass, with density 350 particles/cm^3 @ 35K.
What is 200Msun?
500
The triple alpha process that occurs in the helium core of a red giant fuses three helium nuclei into this element that is essential to life.
What is carbon?
500
The process that high mass main sequence stars use to convert hydrogen into helium.
What is the CNO cycle?
500
A strange star so dense that a teaspoon of its star material can have the equivalent mass of a mountain.