My gOOdness "O"

I say an Orison
For Orion
And wonder whether
There are
Orange Orbs on its
Horizon.
The Old Oaks
Look like
Obelisks.
The Obstinate
Odalisque OD'd on
Obnoxious and Obscene
Octogenarians.
Odysseus Ogled Oenone.
Odin Offended Ophelia.