I’ve heard people describe the asteroid Cruithne as earth’s second moon (the chat show QI did a bit on it, and it’s in a Steven Baxter novel). But I think that’s kind of a misleading description - it orbits the sun not the earth, just in a way that regularly syncs up with the earth’s orbit.
I’ve heard people describe the asteroid Cruithne as earth’s second moon (the chat show QI did a bit on it, and it’s in a Steven Baxter novel). But I think that’s kind of a misleading description - it orbits the sun not the earth, just in a way that regularly syncs up with the earth’s orbit.