Why have we never seen a moon outside our system, until recently? Are they just too small to detect?
Why have we never seen a moon outside our system, until recently? Are they just too small to detect?
Basically: Yes, other planet systems were way too far away to detect moons until recently. Also Yes, most exomoons are likely too small to detect, the one found is planet sized while all other known moons are way smaller.
Yes, its hard to detect planets that far away, detecting moons is an order of magnitude harder.