INSKEEP: But that's no moon, as Teddy Kareta with the Lowell Observatory in Flagstaff, Ariz., explains. TEDDY KARETA: So when people talk about mini-moons or quasi-satellites or any of these other ...

“Now we get to study them up close in a kind of detail that will really revolutionize our understanding of them and objects like them,” Kareta said in an email. “Plus, any time we see a new ...