And if it is the sun, higher density matter like satellites would would experience extreme heat.
Not extreme heat. Satellites do get heated by the sun, certainly, but not to 2500 C. They absorb energy coming from the sun, but they also radiate energy—the stable/average temperature depends on the balance of incoming and outgoing. Satellites have to manage this balance and they do. One very common method is reflective shields.
Think about it this way—why doesn’t the whole Earth overheat?
Not extreme heat. Satellites do get heated by the sun, certainly, but not to 2500 C. They absorb energy coming from the sun, but they also radiate energy—the stable/average temperature depends on the balance of incoming and outgoing. Satellites have to manage this balance and they do. One very common method is reflective shields.
Think about it this way—why doesn’t the whole Earth overheat?