Five short questions this week as I've been concentrating on an animation which should be done very shortly.
Although I'll continue answering questions wherever I find them, there probably won't be any further updates to the Q&A page for a few weeks. Next week I'm holiday. The week after the week after that I'm on holiday again, which is nice. But in the gap there will be an extra-special Q&A replacement ! On May 22nd, by the kind invitation of Ciro Villa, I shall be appearing as a guest on a Universe Today's Weekly Space Hangout. Join us as I look gormless in front of the camera and babble incoherently about hydrogen !
1) If the expansion of space is speeding up, can it eventually exceed the speed of light ?
Sort of yes, if you like, only not really.
2) In relation to earthquakes, can the Earth's axis change over time ?
God, I hope not.
3) Do astronauts on the ISS age differently to people on the ground ?
A leeetle bit, yes.
4) If the Universe is infinite, does that mean impossible things are happening somewhere ?
It isn't and they're not.
5) Can we calculate gravity on other planets ?
Yes.
I also slightly updated the question, Is the Universe infinite ?
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