Match the following phases of stellar evolution to its characteristic. black hole
red giant
black dwarf
brown dwarf
white dwarf

does not undergo hydrogen fusion

has an outer shell of burning hydrogen
and a core of helium

a white dwarf that has lost all its energy

has a core of carbon that is not massive
enough to fuse

formed from the collapse of a white dwarf beyond 1.5 solar masses

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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