Comic 1125 - Objects In Mirror

When gazing past Milky Way stars
Or glancing behind you in cars
That object in view
May be Neptuney blue
Though it seems to be redder than Mars.

Original comic here.

Comic 1123 - The Universal Label

Long ago, in the dark void ethereal
A material quite magisterial
Squeak-popped into view—
It all comes from H₂,
From CDs to sea hawks to cereal.

Original comic here.

Comic 1111 - Premiere

There once was a man from Bolivia
Who cared not for flim-flam or trivia
He'd only one thought:
Earth's eventual mort
That sensible man from Bolivia.

Original comic here.

Comic 1071 - Exoplanets

Eight planets? That notion is comical!
For (however uneconomical)
They've discovered a ton
That don't orbit our sun
And their number is, well, astronomical.

Original comic here.

Comic 1020 - Orion Nebula

My suspicion has grown very strong
That astronomers all have it wrong.
It's a "sword" to the prudes
But the real cool dudes
Know Orion has flopped out his dong.

Original comic here.

I must say, I have heard this suggested before. It seems very likely that the Ancient Greeks made the same joke.