The sun can't really cool down at all mainly because there is too much heat and pressure to make it cool down. The sun also has barely an atmosphere because the heat burned most of it off. So basically, you can't cool off the sun for it will only heat up all over again.
Earth will cool in hundreds of millions, maybe even billions of years. The earth stays hot because of the radioactive elements at the earth's core, which are insulated by the existing rock or earth. The insulation of the radioactive elements retains heat generated by them, thus melting the rock. The heat is generated by the attenuation of radiation in the material (earth). The earth will cool when the radioactive elements in the earth exceed their half- lives several times and will no longer generate heat. There is no way any person on earth can cool the core any faster than it would by itself, if that is what you're asking.
Also, you don't want the earth's core to cool because then the outer core would cease to remain liquid and so there would no longer be any spinning metal in the core that creates the electromagnetic field we so know and love that protects us from solar, not to mention cosmic, radiation.
Hopefully, that is what you meant by your question.
These are the only things that will cool the earth greatly.
If there was more carbon dioxide being taken out of the atmosphere than is going in, then our enhanced greenhouse effect would slow and the earth would be cooler. The only way this can happen is if we stop burning fossil fuels and plant more forests.
Well, the place close to the equator are cooler because they are closer to the equator. Also, the equator is cooler.
Takes a cold shower. OR radiant heat leaks out of its atmosphere into the universe.
deforestation
after collisions subsided, the earth's surface was able to cool, but the interior remained hot
Chocolate crystals!
They areigneous intrusive rock.
Magma doesn't cool on the surface as soon as it comes out of the earth it's lava
Extrusive igneous rock is formed from rapidly cooled lava at Earth's surface. Examples are obsidian and basalt.
Lava on the earth's surface will cool quickly.
after collisions subsided, the earth's surface was able to cool, but the interior remained hot
Chocolate crystals!
Are those that forms beneath the earth surface
They areigneous intrusive rock.
Magma doesn't cool on the surface as soon as it comes out of the earth it's lava
It is hot in the Precambrian time
Extrusive igneous rock is formed from rapidly cooled lava at Earth's surface. Examples are obsidian and basalt.
Igneous rocks that cool under the Earth's surface. They are called intrusive rocks.
Extruded magma (lava) can cool on the surface, or under water. Magma also cools underground, forming intrusive igneous rocks such as granite.
Longwave (mostly infrared)
As the collisions tapered off the earth began to cool, forming a thin crust on its surface.