If they were both the size of the Sun then the Earth would not form (It would be a star).
Imagining fr a second that Earth did form the bodies would rotate around a common centre of gravity. And we would all be squashed flat by the Super-Earth's gravity (not that we would be there in this totally hypothetical senario).
If they were both the size of the Earth then the Sun would not be nearly large enough to achieve fusion in it's core. So would not be a star.
Objects of greater mass have more gravitational pull.
Stars with a mass about 9 solar masses, or greater, will explode as a type II supernova.
Gravitational forces between objects depend only on their masses and the distance between them. Velocity has no effect.
All stars are in a balance between gravity crushing them in, and the pressure caused by nuclear fusion at the star's core. And the bigger the star, the greater the amount of energy generated. At some point, the pressure of the stellar fusion is SO powerful that the outer layers of the star are blasted off into space. That point, we believe, is at about 150 solar masses.
A white dwarf's mass is comparable to that of the Sun while its volume is comparable to that of the Earth. The Sun is 100 times larger than the Earth, so a white dwarf has a mass 100 times greater than the Earth.
Gravity is greater between objects with large masses than between objects with small masses.
instead of working on science try your english. btw tornado
When their masses are greater, and when their centers of mass are closer together.
The mass of a proton is 1836 times greater than the mass of an electron.
When either or both of their masses are greater, and when their centers are closer together.
Elements that have greater atomic masses then uranium are created using nuclear fission.
Objects of greater mass have more gravitational pull.
calcium
Gravity is the attractive force between two masses. The greater the mass, the stronger the attraction.
because the air pressure is more dense
supernova
Density = Mass/Volume, whatever the shape. So, if the masses are the same, the density is greater when the volume id smaller. Thus the sphere, with the smaller volume has the greater density.