The Sun
The two main elements of which the sun's mass is made.
What is hydrogen and helium?
When a reaction starts producing too much energy an everything in the vicinity begins to melt
What is a meltdown?
All the stars that can be seen from earth with the naked eye belong to this galaxy.
What is the Milky Way?
The largest stars in the universe.
What is a supergiant?
The two main kinds of variable stars.
What are pulsating variables and novas?
The four distinct regions into which the sun is split.
What are the core, the radiative zone, the convection zone, and the photosphere?
More than 30 people died as a result of this nuclear power plant which did not have enough safety protocols causing its system to explode and exposing thousands to high levels of radiation.
What is Chernobyl?
The three types of galaxies grouped according to their appearance.
What are Spiral Galaxies, Lenticular Galaxies, and Elliptical Galaxies?
The graph depicting both a start's temperature and its magnitude.
What is the Hertzsprung-Russell Diagram?
Bright gases left over from an explosion of a supernova.
What is a nebula?
When two hydrogen nuclei collide and fuse together.
What is nuclear fusion?
A self sustaining set of nuclear reactions in which neutrons produced by nuclear fission cause more nuclear fission.
What is a chain reaction?
A galaxy that cannot be classified as spiral, lenticular or elliptical.
What is an irregular galaxy?
The brightness of a star as seen in the night sky.
What is apparent magnitude?
Two stars close enough to each other to orbit one another.
What are binary stars?
What are solar flares?
The amount of isotope necessary to sustain a chain reaction.
What is critical mass?
When galaxy clusters group together into giant groups.
What are superclusters?
What is absolute magnitude?
A well-studied class of pulsating stars, usually between five and 20 tomes as massive as the sun.
What is the Cepheid variable class?
The only part of the sun that we actually see.
What is the photosphere?
The process by which a large nucleus is split into smaller nuclei.
What is Nuclear fission?
Wavelengths of light emitted by elements when excited.
What are spectral lines?
The one of seven class designations given to a star based on its temperature.
What is a spectral letter?
A true explosion of a star. It expands rapidly and brightens enormously before fading away permanently.
What is a supernova?