4 ms·
Geothermal heat provides less than 0.1% of the total heat of our planet. It is pretty much all just the sun. So as long as the output of the sun does not change
by doikor 4y ago
Geothermal heat provides less than 0.1% of the total heat of our planet. It is pretty much all just the sun. So as long as the output of the sun does not change much it won't be a problem (so will have to wait billions of years and even then sun will actually get bigger and hotter first before getting colder)
- lrem 4y agoWon't Earth be engulfed in the first phase? If that's the case, Solar gasses will also drag down our orbital velocity and Earth will fall towards the core. So it won't be around for the second phase.
- NineStarPoint 4y agoThe issue is that when the core cools too much it will cease to be magnetic, and then solar radiation strips the atmosphere. But it’s not a major concern, in this case faster still means billion year time scales.
- u320 4y agoThe planet is expected to still be mostly molten by the time the sun swallows it, so there is a huge margin. I think people underestimate just how much energy there is down there.
- SoftTalker 4y agoAnd it's being replenished by nuclear decay. It's not just the original heat from the compression/collisions of material when the planet formed.
- mahkeiro 4y agoVenus doesn’t have an internal magnetic field and has a thicker atmosphere than earth.