What Would It Actually Take for Aliens to Reach Earth?
You thought engineering the Eiffel tower was a big deal
What Would It Actually Take for Aliens to Reach Earth?
You thought engineering the Eiffel tower was a big deal
By Jim Reynolds | www.reynolds.com
June 1, 2026
Note: A reader pointed me toward the original article. After reading it, I committed a small act of Reynolds. You can find the original HERE.
Everybody wants aliens.
Nobody wants arithmetic.
Every few years, the government releases another batch of blurry UFO videos and the internet loses its collective mind.
“They’ve arrived!”
“They’re here!”
“They’ve been living under the Denver Airport for decades!”
Maybe.
But before we start learning Martian pronouns, let’s discuss a small logistical problem:
How the hell did they get here?
The nearest star system is Proxima Centauri, a mere 25 trillion miles away.
Twenty-five trillion.
For reference, if Earth were the size of a pea, Proxima Centauri would still be on the other side of the planet. Or maybe a different real planet.
Bob: 🅱️ “At that point you’re not taking a trip. You’re relocating a civilization. Better take grandma and the dog along, too.”
And that’s just the nearest star.
That star is just as far from the next star.
The nearest intelligent civilization—assuming one exists—could easily be hundreds or thousands of light years farther away.
That’s where physics begins laughing. And physics doth have a sense of humor.
Nothing can travel at the speed of light. Not even a homerun off the bat of Shohei Ohtani.
Science fiction treats this as a minor inconvenience.
Physics treats it as a restraining order. With teeth.
Even if some advanced civilization managed to reach 10% of light speed—a staggering engineering achievement—a ten-light-year trip still takes roughly a century. That’s in people years.
One hundred years.
Hope the kids enjoy the back seat. They may reach boredom with the games they are playing on their iPads.
Fuel doesn’t help much.
Chemical rockets?
Forget it.
To accelerate a meaningful starship to interstellar speeds would require enough fuel to make ExxonMobil ask for a second opinion. Or a new Permian Basin.
Antimatter?
In theory, wonderful.
In practice, humanity has produced less antimatter than would fill a microscopic freckle on a flea.
Nuclear fusion?
Better.
But still on the other side of ridiculous.
Imagine arriving at the launch pad with a spaceship the size of Los Angeles and a fuel tank roughly equivalent to Oklahoma.
Pilot to Bezos: “Can we strap on an extra Alaska?”
Bob: 🅱️ “The launch checklist alone would require its own moon.”
Then there is the small matter of survival.
At 10% of light speed, space stops being empty.
Individual hydrogen atoms become tiny bullets.
Dust particles become artillery shells.
A paint chip becomes a career-ending event.
Bob: 🅱️ “At 10% light speed, a pigeon becomes an air strike.”
The hull must be:
Feather-light.
Nearly indestructible.
Radiation-proof.
Able to survive centuries.
In engineering, these are known as mutually exclusive requirements.
It’s like shopping for a car online and selecting:
✓ Cheap
✓ Fast
✓ Indestructible
✓ Seats 500
✓ Crosses oceans
✓ Has a real spare tire, not a donut
Result:
“No matches found.”
This is where UFO discussions usually become entertaining.
The same people who struggle to keep their iPhone charged for a day casually assume somebody solved:
Interstellar propulsion.
Century-long life support.
Radiation shielding.
Navigation across trillions of miles.
Fuel requirements bordering on insanity.
How to keep the kids entertained in the back seat for approximately 200 years.
And then arrived here undetected.
Bob: 🅱️ “Getting to Earth is the easy part. The hard part is finding parking.”
Now, could aliens exist?
Absolutely.
Could intelligent civilizations exist elsewhere?
Certainly.
Could somebody eventually discover physics that makes interstellar travel practical?
Maybe.
Warp drives.
Wormholes.
Space-time manipulation.
Who knows?
But every proposed solution merely replaces one impossible problem with three new impossible problems.
Which leaves us with a funny conclusion.
If a spaceship lands in your backyard tomorrow, the most important question won’t be:
‘Where are they from?’
Or:
‘Why are they here?’
Or even:
‘Do they come in peace?’
The first question should be:
‘How did you idiots beat the math?’
Because that’s the real mystery.
Bob’s Final Observation:
🅱️ “Everybody wants to meet the aliens.
I’d rather meet their engineer.”
That’s Reynolds.
The part that sticks with me that I learned many years ago: When you look to the stars in the night sky you are peering millions of years into the past. That’s how long it takes for their twinkle to get to us. How do we catch up with that? I was crushed in the first grade when they told me that the fat guy in the red suit was a scam. The first of many disappointments. 🅱️ “The stars taught me something Santa never could. Reality is under no obligation to arrive on time.”
Wow! Some guys are real killjoys. After debunking Santa Claus and the Easter Bunny, I suppose you're going to attack flying, fire-breathing dragons also. I've read that the universe is expanding at an accelerated rate...which means that if we had our magic spaceship today, the target planet is running away from us faster than we can catch it. But not to fear, our stalwart SciFi fans know that the warped cruise ship can make the jump in 30 days or less, that there will soon be space-ship battles using laser weapons. Two-headed weird alien beings will visit Earth and interstellar governments will rule...someday. Don't take away our dreams, you pragmatist.