There already is a demand for prompt engineering, with excellent pay too. However, I suspect that this will be a very short lived opportunity, as AI will quickly evolve beyond the need. I think in the very near term, we will se AI prompt engineers.

Plenty of rocks crash into gas giants. The problem is they don't survive more than a mile or so before being completely broken apart by the extreme winds, temperatures and pressure.

So by the point you get, say, two miles down - there are really no large objects of any type. Instead you get bands, based on the pressure, where elements like to accumulate. But they would be more like a fluid than a solid.

If there is anyone dead on the moon, it would be a woman named Alice.

(You have to be pretty old to get that reference)

I was once lecturing along side a NASA scientist (I'm ex-NASA) and she was explaining the gas giants. Afterwards, I took her aside and said "considering the pressure of gas giants, and all the stuff falling in, doesn't it make sense that there is a solid core, even if tiny?".

She agreed that it does make sense.

However, technologically, we can't probe that deep yet (it's just too big with too many complex layers).

Well, first, gas has mass - and in Jupiters case, it adds up to a lot of mass.

Second, Jupiter has pressure - huge pressure the further down you go - so yes, at some point there will probably be areas of metallic gasses, etc.

Whether there is a solid core or not is still unknown.

No. Our own solar system is very young in universal terms. There has been billions of years for older civilizations to exist.

Furthermore, only the farthest galaxies are that old, and we can’t see beyond the CMB (300,000 years after the BB). Note that the first stars did not form for hundreds of millions of years after the BB.

Plus your comment only applies to the furthest away galaxies. The closest star to us (other than our sun) is a scant 4 light years away.

These days we take great pains to not do that exact thing. (Earlier missions, not so much so.)

Mainly, because if we detect life on other planets - we have to make sure we didn't introduce the life ourself. (And vice-versa.)

Now, once we have explored some promising planet or moon, and determined that there is no meaningful life there - then terraforming because more feasible.

Vacuum decay (or sudden phase change) is not related directly to accelerated expansion of the universe (at least to our current knowledge) which is being driven by dark energy.

In one situation, expansion simply keeps on going, giving us the Big Freeze.

In other situations, dark energy at some point becomes attractive and the universe starts to contract and ends up in a Big Bounce.

Vacuum decay is different. It is a sudden shift of the lowest level of energy of the Higgs field. We wouldn't see it coming at all.