Imagine being reduced to a rounding error.

Imagine your whole life. Your parents' lives. Their parents' lives, reduced to a flash, an instant, an afterthought.

Imagine space.

At the risk of sounding a little too deep for a Friday, imagine this NASA spacecraft set to launch Monday.

Its mission: to journey to the asteroid belt that lies between Mars and Jupiter — asteroids likely formed more than 4.5 billion years ago.

That figure didn't wow me, as much as NASA's little footnote afterwards: 4.5 billion, "give or take a couple of 100 million years."

"Give or take a couple of 100 million years" — as if it was a small rounding error.

200 million years ago dinosaurs roamed this place.

It took another 198 million years before anything close to human form started popping up on this place.

It's as if everything between beasts and Barney was relegated to a flash and everything since… a flicker.

The pyramids, the Roman Empire, the 100 Years War — all wars, all countries, all leaders we've ever known, and likely will ever know, just statistical rounding errors.

If that doesn't humble you, I don't know what will.

In the enormity we call space, we are but spit.

In the cosmos, we are zeroes.

So steeped in the moment that we forget "we" are only the moment. It's not that we're pointless — maybe, just clueless. To the universe we can't help but see, but whose timeless wonder we can't begin to fathom.

Watch Neil Cavuto weekdays at 4 p.m. ET on "Your World with Cavuto" and send your comments to cavuto@foxnews.com

Neil Cavuto serves as senior vice president, anchor and managing editor for both FOX News Channel (FNC) and FOX Business Network (FBN). He is anchor of FNC's Your World with Cavuto - the number one rated cable news program for the 4 p.m. timeslot - as well as the FNC Saturday show Cavuto on Business. He also hosts Cavuto on FBN weeknights at 8 p.m. In addition to anchoring daily programs and breaking news specials on FNC and FBN, Cavuto oversees business news content for both networks and FNC's weekend business shows, including Bulls & Bears, Forbes on Fox, and Cashin' In. Click here for more on Neil Cavuto.