[NoSorryCannot]

7 billion years has got to be a bit of a stretch goal, even if you're very bullish on biotech...

[fumar]

Do we know of anything that has that type of lifespan outside of celestial bodies like planets?

[vimacs2]

M type dwarfs can easily have a lifespan in the main sequence spanning many trillions of years with even their red giant phases estimated to outlasting even the main sequence of stars of our size.

A steller mass black hole's estimated lifespan would of course make even these seem like an eyeblink by comparison.

[Beltalowda]

Both the earth and sun are about ~4.5 billion years old. 7 billion is completely off the charts.