Because the orbital period and rotational period are the exact same.
Answer:
A
Explanation:
Sometimes it doesnt even occur once
Answer: about half the mass and a million times higher density.
The closest answer is B
Explanation:
A white dwarf is what remains of a star after it uses up its nuclear fuel. Before a white dwarf is formed, it discards the external layer and retains its hot center. This center can be as hot as a hundred thousand Kelvin which then takes tens of millions of years to cool down. White dwarfs are very dense, an Earth-sized white dwarf has a density of a billion kg/
. In comparison to the sun, it is about half the mass and a million times denser.
Birth rate, death rate ,emigration , immigration