And in astronomy news today . . .
Many famous comets may be visitors from other solar systems
One poster here said that Kuiper Belt objects have a very low albedo, which is the case for some but not others:
Astronomers Study Kuiper Belt Object During Stellar Occultation
And no, the Oort Cloud has not been directly observed (yet), which is why creationists love to harp on about how it doesn't really exist. Telescopes will shortly prove them wrong and they'll have to look for another red herring.