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By Jerry Zezima

Space — the one between my ears — is the final frontier. Or at least I thought so before I took a voyage in the car ship Zezima. My mission: to see an eminent astronomer and find out why lunar craters, Martian chasms and other galactic bumps in the road are nothing compared to the potholes on my street.

“It’s like driving on the surface of the moon,” I told Fred Walter, a professor of astronomy at Stony Brook University on Long Island, New York. “I’m afraid I’ll hit a pothole and go into a black hole.”

“There’s a hole on Mars called Pavonis Mons that’s 35 meters across and 20 meters deep,” said Professor Walter, calculating that the measurements equal 115 feet by 65 feet. “That’ll stall your car.”

“That’s nothing. There are some on the expressway that must be even bigger,” I said. “I hit one the other day and thought my car would explode. Now I know how the astronauts felt when they drove those lunar rovers.”

Professor Walter knew I was referring to the vehicles used in the Apollo 15, 16 and 17 moon landings of 1971 and ’72.

“They’re like convertibles — no roofs,” he said. “And no doors.”

“The astronauts were lucky they didn’t get thrown out when they hit a crater,” I said. “I hope they were wearing seatbelts.”

“Rovers don’t have them,” Professor Walter said.

“At least there were no cops on the moon to give them a ticket,” I noted.

Even though some lunar craters are comparable to terrestrial potholes, the astronauts never had to worry about blowing out a tire.

“The edges of moon craters tend to erode, so they’re not as jagged as the potholes here on Earth,” Professor Walter said. “And rovers have metal mesh wheels, so they are a lot stronger than the tires on your car.”

“I guess the astronauts didn’t have to call AAA,” I said, referring to what should be named the Aeronautical Assistance Association.

I told Professor Walter that I took astronomy in college because I thought it would be fun.

“How did you do?” he asked.

“I almost flunked,” I replied. “I didn’t realize — because I was a stupid college student — that it involved math.”

“I do as little math as possible,” said Professor Walter, who’s 67 and graduated from MIT in 1976.

“I knew all the planets,” I said. “And I once saw a meteor shower. I figured that was enough.”

“Astronomy is an observational science,” Professor Walter said, “but it’s a lot more than just knowing the planets.”

“Speaking of which,” I said, “I was devastated when Pluto was demoted.”

“It deserved to be,” he said about the decision in 2006 by the International Astronomical Union to downgrade Pluto to the status of “dwarf planet.”

“I bet the Disney Company had something to do with it,” I said. “They probably thought the planet was competing with their cartoon dog.”

“Nonsense,” Professor Walter said. “Pluto is tiny and far out. What would you rather be, the runt of the planets or the king of the dwarf planets?”

“I’m not even a star here on Earth,” I said.

Another planetary controversy, I posited, is the correct pronunciation of “Uranus.”

“It’s not how you think it’s pronounced,” Professor Walter said, a disappointing revelation for a jokester like yours truly. “But you can say it the funny way, too.”

“Good,” I said. “It’s appropriate for a planet that’s made of gas.”

Uranus and the other gas giants — Jupiter, Saturn and Neptune — don’t have potholes because their surfaces aren’t solid.

“But Pluto has them, right?” I asked Professor Walter.

“In a manner of speaking,” he said, explaining that the little rocky ball is covered in ice. “The surface has craters. If you want to call them potholes, go right ahead.”

In addition to Earth and Mars, two other terrestrial planets — Mercury and Venus — have craters.

So, of course, does the moon.

“Some are very big and some are very small,” said Professor Walter, who has been teaching astronomy at Stony Brook for 33 years and is a fan of the original “Star Trek” TV series.

“I use a flip phone and it’s usually turned off,” he said. “I miss my old phone, which was the size and shape of a ‘Star Trek’ phaser. I could flip it open with one hand.”

He also drives a 2007 Honda Civic.

“It has a stick shift,” said Professor Walter, who is married with two grown daughters and three grandchildren. “I taught one of my daughters to drive a stick shift when she was in high school. She said it impressed the boys.”

“Have you hit any potholes?” I asked.

“Yes,” he admitted. “There’s one on Sheep Pasture Road that’s huge. I hit it recently, but the car wasn’t damaged. It’s really well-built.”

It helps, Professor Walter said,  to drive slowly.

“I go only 5 miles per hour over the speed limit,” he said. “Maybe 10. I try to go around them.”

He added that asteroid and meteor strikes and the freeze-thaw cycle contribute to the creation of craters and, of course, potholes.

“The universe surprises us,” Professor Walter told me. “It’s always expanding. Everything gets emptier with time.”

“My head has already achieved that,” I said.

“No comment,” the good professor replied.

“Admit it,” I said. “The space between my ears would make for a pretty good pothole.”

— Jerry Zezima

Jerry Zezima writes a humor column for Tribune News Service, which distributes it to newspapers nationwide and abroad. He is also the author of six books, Leave It to Boomer, The Empty Nest Chronicles, Grandfather Knows Best, Nini and Poppie’s Excellent Adventures, Every Day Is Saturday and One for the Ageless, all of which are “crimes against literature.” He has won seven awards from the National Society of Newspaper Columnists for his humorous writing.