From the friction caused by moving through the earth's atmosphere.
Friction as the spacecraft comes into contact with the earth's atmosphere.
A spacecraft has to work against the air friction when it enters our atmosphere. Thus it gets heated a
the earths core gets hot by all the heat on the surface and gose to the core of the earth.
in the middle of earth gets about 14265 degrees inside.
the deeper you go the hotter it gets
the earth gets hot in cold because of the earths tilt in the summer time most of the sun is on the earth in the winter time less of the sun is on the earth
From the inside of the Earth, which is fairly hot. The Earth gets its heat from radioactive decay.
It gets more hot and burns . then you see the light as it gets closer to the sun.
When the crust under the earth gets pushed up and then the magma gets really hot and BLOWS UP.
Most Likely the satellite gets hot form coming in close proximity with the earth's atmosphere, skipping along it, therefore causing friction with it and heating it up.
A "meteor" is when you see a "shooting star"; at that moment, the object is entering the Earth's atmosphere, and since it enters with a very high speed, its temperature, at least on the surface, gets hot enough to vaporize any material. Probably a few thousand degrees.
The earth gets its heat energy from the sun. The sun is hot because it is just a massive ball of deadly gases :)