There’s a moment that hits me pretty often when I’m out riding my bike through Saigon at night. I’ll glance up at the sky between the buildings, catch a smear of stars, and feel my chest do something strange. A quiet kind of recognition. We’re floating.

But most of the time, I forget. We all do. The brain wasn’t built to hold numbers like “a billion light years” in any real way. They’re too abstract to feel. They just bounce off.

Sometimes though, a comparison comes along that breaks through. Something that turns the abstract into a punch in the gut. Something that makes you stop scrolling and remember what you actually are.

Here are five of my favourites.

1) Driving to the Sun would eat almost three human lifetimes

The Sun sits about 93 million miles from Earth. According to BBC Sky at Night Magazine, if you got in your car and drove at 60 mph, with no stops for sleep, food, or traffic, you’d arrive in roughly 177 years.

That’s longer than electric lighting has existed in most homes. It’s nearly three full human lives back to back. You’d be the great-great-grandparent of whoever finally pulled into the cosmic parking lot.

And the Sun is the closest star to us by an enormous margin.

I think about this whenever I’m complaining about a 30-minute drive to the airport. The nearest big object in the sky, the literal source of all life on Earth, is so far away that no human could ever drive there even if they spent every breath of their existence trying.

That’s not just a fun fact. It’s a kind of perspective rehab.

2) The sunlight on your face is already 8 minutes old

Want to mess with your sense of “now”?

Light is the fastest thing in the universe, moving at about 300,000 kilometres per second. And yet it still takes around 8 minutes and 20 seconds for sunlight to travel from the Sun to your eyes.

Which means the photons warming your skin right now left the surface of the Sun before you read this sentence.

3) If the Sun were a soccer ball, Earth would be a peppercorn 26 paces away

Quick question. When you picture the solar system, what does it look like?

Probably tightly packed planets, all neatly visible in one image, like the diagrams from school.

Those diagrams lie. They have to. If you drew everything to scale, you wouldn’t be able to see the planets at all.

Astronomer Guy Ottewell created what’s called the Thousand Yard Model. Shrink the Sun down to an 8-inch ball, roughly the size of a soccer ball. Now Earth is the size of a peppercorn, sitting 26 paces away. Jupiter is a chestnut about 95 more paces past Mars. Pluto, on this scale, is a pinhead nearly a thousand yards from the Sun.

Between all of those tiny seeds is mostly nothing. Empty space. A whole lot of it.

When I first really sat with this, my model of the solar system collapsed and rebuilt itself in about 30 seconds. We’re not packed in tight with our cosmic neighbours. We’re hurtling through an enormous void on a peppercorn, around a single soccer ball, in a galaxy of hundreds of billions of similar arrangements.

That’s the real neighbourhood. Not the picture in your kid’s textbook.

4) Voyager 1 has been flying for nearly 50 years and is barely out the door

In 1977, NASA launched Voyager 1. It’s been travelling at about 17 kilometres per second relative to the Sun ever since. That’s roughly 61,000 km/h.

It crossed into interstellar space in August 2012. According to NASA, “traveling at speeds of over 35,000 miles per hour, it will take the Voyagers nearly 40,000 years” to reach roughly halfway to Proxima Centauri, the closest star to our Sun.

Read that again. Nearly half a century into its mission, the most distant object humanity has ever launched still needs about 40,000 more years just to reach the halfway point to the next star.

I’ve talked about this before but the constant impatience of modern life starts to look pretty silly when you measure it against the actual scale of the cosmos. You can’t really be in a hurry in a universe like this. The universe doesn’t care about your two-day shipping.

5) The number of stars in the universe rivals the grains of sand on Earth’s beaches

Carl Sagan made this comparison famous, and the more you sit with it, the harder it lands.

It’s a bit fuzzier than the popular phrasing makes out. Scientific American ran the numbers and found roughly 2 x 10^19 stars in the observable universe and around 4 x 10^20 grains of sand on the world’s beaches. So the cliché doesn’t quite hold up if you include all the sand on Earth, but the two numbers are at least in the same ballpark, which is itself astonishing.

You are one creature on one planet around one star in a galaxy of an estimated two trillion galaxies in the observable universe. That’s not a depressing thought. That’s a humbling, freeing, weirdly uplifting one.

Final words

None of these facts fix anything. Your inbox will still be full tomorrow. The thing you’re stressed about will still be there.

But scale is medicine. Even a small dose of it, taken regularly, does something to the nervous system that nothing else quite manages. It loosens the grip of the small story. It reminds you that you are an unimaginably lucky speck of stardust, somehow alive, somehow conscious, somehow capable of looking up.

So look up tonight. Find one star. Remember that its light is older than you are.

Then go back to your life with slightly different eyes.