SUNSET: 
Dwarf Planet 2007 OR10: Big, Dark, and Slow
A Kuiper Belt object discovered nearly a decade ago turns out to be much darker — and thus larger — than thought. It's also an especially slow spinner.
Astronomers Gauge Spin in Black Hole Duo
Astronomers have measured the spin of one of the universe's most massive black holes — and provided evidence that the behemoth has a companion.
Setting Limits to Black Hole Gluttony
Black holes may have a limit to how much they can eat in the public eye.
