I don’t see anything incorrect in what you say. (Sounds to me like a direct consequence of the equivalence principle, although I’m no GR expert.) But I’m assuming away the possibility of rogue black holes in this hypothetical, since I’m wondering whether a sufficiently sensitive sensor could detect its own acceleration even inside an otherwise empty universe (or at least without reference to the rest of the cosmos).
I don’t see anything incorrect in what you say. (Sounds to me like a direct consequence of the equivalence principle, although I’m no GR expert.) But I’m assuming away the possibility of rogue black holes in this hypothetical, since I’m wondering whether a sufficiently sensitive sensor could detect its own acceleration even inside an otherwise empty universe (or at least without reference to the rest of the cosmos).