Daylight Again is best known for the hit, Southern Cross.
Wikipedia is oddly silent about the UFO’s.
Daylight Again
What up with that? There has to be a story that goes with UFO’s and phalluses.
Those aren’t phalluses (phalli?), they’re alien anal probes.
Southern Cross Crosby Stills & Nash live
Fantastic song in the “Rich White People Problems” category:
“Boo hoo, I have relationship issues but my ocean-going sailboat kind of takes my mind off of them”. Literal Yacht Rock! 
…as sarcastic as that sounded, I really do like the song. I learned how to sing and play it on guitar at one point.
The album cover art represents a fantasy of rebirth.
The 3 UFOs are supposed to be Crosby, Stills and Nash moving into a new reality.
Or it was a drugged fueled, rather well rendered piece of a nothing burger. I wouldn’t read too much into it
Other than maybe The Beach Boys one else has ever done the vocal harmony thing as well as they did! If only they could have stayed together? The best musical trio of all time ….JMHO
My first concert was part of the tour for that album.
I’m enjoying the music on this album. It’s unfortunate the three stars didn’t like each other.
Wikipedia reports David Crosby wasn’t originally supposed to be on this album.
The three UFO’s have some significance. Maybe just a joke.
It might’ve been a “joke”.
But I suspect it was just art to be art.
You can look up the front cover artist: Gilbert Williams.