[mlo]

"The computation required just to find your way home would be ... astronomical."

Relativity. There is no base reference. All of that motion is relative.

[kjam22]

The article says: "The greatest of them is Sergei Krikalev, a cosmonaut now also a chrononaut by virtue of having spent so long in space that it’s been calculated he’s travelled into his own future by about 1/200ths of a second.

OK, it’s not much. But it’s still enough to be tricky to get your head round. It’s all down to time dilation, something predicted by Einstein’s Theory of Relativity but which we can measure, whereby the faster someone goes (and Sergei spent over two years in orbit on Mir and the International Space Station travelling at over 17,000mph) the slower their clock goes relative to those back down on Earth. It’s more complicated than this because gravity is also involved, but Sergei has aged fractionally less than he would have if he’d not gone into space."

This is almost as much BS as something Jen Psaki might say.

[zeugma]

Relativity. There is no base reference. All of that motion is relative.

Which would actually make it a bigger computational problem.