Are you buckled up? Not that it matters—space will end us all, seatbelt or not. Let’s get existential and talk about how astronauts know how fast they’re hurtling through the void, aka the world’s most expensive coffin for billionaires. Strap in (ha!), because measuring velocity in space isn’t just a math problem—it’s proof that cosmic fate has not only a sick sense of humor, but a stopwatch, too. Here on Earth, measuring your speed is child’s play. You’ve got cows, mailboxes, and existential dread blurring past—plus a speedometer that lies to you every time you slap on new tires. But take away atmosphere and planetary bureaucracy, and suddenly you’re less Ferris Bueller, more Schrödinger’s commuter: both stationary and barreling toward doom, depending on who’s asking. Try telling how fast you’re moving when everything outside your window looks like Meditative Black Screen for Cats. It’s not fair. Planes get airspeed sensors: they sip on the breeze like it’s an overpriced oxygen latte, and GPS satellites baby them from above like overbearing parents at soccer. But in space? Space has no air, no GPS, and definitely no parents. Just radiation and a silent, endless void judging your every move. If you somehow ended up piloting a space capsule (perhaps because you bought a non-fungible ticket to Elon’s Next Big Thing), you will be shocked to learn the cosmos does not come equipped with tiny mile markers or roving bands of cows. Instead, you get the pure, visceral thrill of physics. You want to know your speed on Mars approach? Better hope you paid attention in high school, because Newton’s laws are now also your last will and testament. Let’s talk measurement options, because it’s not like you have anything else to do while inching closer to interplanetary kaboom. Option one: throw something out the window and compare notes, except you can’t open the window because vacuum. Option two: stare at the stars and—wait, they’re all standing still. Unless you’re moving unspeakably fast, which you are, but space cares not for your terror. No, our doomed cosmonauts are left with the ancient pagan rituals of math. In space, velocity is calculated by tracking your position over time, except position is entirely arbitrary unless you reference something else as doomed as you—like a planet, a comet, or the yawning abyss of your own regrets. If you try to measure speed the way you did on that road trip to Vegas—distance over time—you’ll only see how far you’ve strayed from hope, not how fast. The universe tracks velocity as a vector, which is basically a euphemism for “going nowhere, with purpose.” Basically, every astronaut is haunted by the ghost of high-school physics teachers past. They’ll use radar bounces, laser beams, and mathematical hand-waving to divine their trajectory, convinced at all times the numbers are wrong and certain Mars will either come too soon or never at all. In the end, the true velocity of any astronaut is toward the grave, with a scenic detour past Mathematical Despair City, Population: everyone in a spacesuit. So next time you think about complaining that your rideshare app can’t find you, remember: at least you’re not a million miles from civilization, defining velocity with calculus, and facing cosmic futility. But then again, we all are, in our own way. Speed is meaningless. Time is a joke. Welcome to the apocalypse.