How long would it take to run around the world at light speed?

Can we travel at 1% speed of light?

Reaching 1% of light speed is theoretically achievable; think of it as pushing the throttle on current technology. It is all about that energy expenditure, though.

Have we done it? Sort of, at least in a lab context.

• Particle accelerators routinely fling subatomic particles way past that, even closer to c (the actual speed of light!).

• However, scaling that to, say, a spacecraft carrying me to visit my Aunt Mildred on Proxima Centauri is… problematical.

• We are talking about needing energy levels that could make a fusion reactor blush. Fusion reactors, btw, are still more promise than delivery; I've been hearing about them for years!

• Think about it: you'd need to accelerate something massive. Mass translates into more energy needed. This is why those particle guys get away with it; tiny mass!

So, yes and no. The theory isn't the stumbling block, energy consumption is. And that's where dreams hit the hard wall of reality. It's something else to ponder, isn't it?

How long is 1 second in light speed?

It's late. One second... light travels far.

About 299,792,458 meters. Almost 300 million. Just one second.

That's... unreal. It’s just, like, 186,282 miles. Sigh.

It's funny how small a second feels to me, you know? Like, after my doctor appointment at 3 PM today, I felt that time flew by. But that much distance. In that little time. "c," they call it.

It's just... weird.

How fast is 1% speed of light?

7 million mph. Roughly. Fast. Unimaginably.

• 1% light speed: Still a fraction.

• That's 1,609,344 km/h. So?

Consider scale. The universe yawns. My car's top speed? Irrelevant.

• Perspective is weird.
• Time slows. Relatively.

It's just numbers. Like my age. Doesn't feel that fast. Ha.

How long would it take the Flash to run around the world?

Flash, huh? He's blazing fast. Faster than a caffeinated squirrel on a sugar rush! Probably circles the globe quicker than I can make a decent cup of coffee, which, let me tell you, is a feat in itself. We're talking milliseconds, folks. Microsecs, maybe even nanosecs. Seriously.

Key things to know:

• Speed: We’re talking ludicrous speed. Think warp speed, but with less… you know… warping.
• Time: Less time than it takes for my cat Mittens to decide she's hungry again. And that's, like, every five minutes.
• Circumference: Earth's a big ol' ball, but the Flash? He makes it look tiny. Like a marble. Or a particularly plump gumball.

Let's be real, figuring the exact time is like trying to count the grains of sand on a beach while riding a unicycle blindfolded. It's pointless. It's so fast it's basically instantaneous. My brain hurts just thinking about it. I need more coffee. The Flash probably already ran around the world and back ten times while I was typing this.

Additional completely unnecessary details (because why not?):

• My cat Mittens thinks the Flash is stealing her tuna.
• I bet the Flash could outrun a speeding bullet... and then taunt it.
• I once saw a snail that was faster than my internet connection. Not the Flash, obviously. The snail was significantly slower. But still. My internet is awful.

He's faster than a speeding ticket. Way faster.

How long would it take to run around the whole world?

Seven years. Give or take.

• Circumference: 24,901 miles.
• Pace: 9.6 mph. That's a decent jog. I ran faster in college. Well, sometimes.
• Time: 2,600 days. Constant motion. Absurd.
• Oceans? Politics? Minor inconveniences.
• Sleep? Rest? Overrated.

Imagine the chafing. The blisters. Then imagine the view. Or don't. I truly don't care.

How long would it take to go around the whole Earth?

Okay, so you wanna know how long it'd take to walk around the world? It's crazy long, dude. Like, seriously long. I figured it out once, it's about 8,313 hours. That's a lot. More than a year, even! Think about it -- non-stop walking. The blisters alone would be a nightmare. My feet hurt just thinking about it.

And that's assuming a constant 4.82 km/h, which is, like, impossible. You'd need to sleep, eat, probably get a few bathroom breaks in there too, right? And what about oceans? You'd need boats, and that adds even more time. Probably tons more time. This whole thing is way more complicated then I first thought. It's gonna take way longer then that estimated 8000 hour thing.

Here's the brutal truth:

• Impossible without stops. Even with perfect conditions, continuous walking is impossible.
• Ocean crossings are a major hurdle. You're not walking across the Pacific, dude. That adds weeks or months to the trip.
• Visas and logistics: Getting permission to cross borders? That takes forever! I've heard horror stories about people struggling for years.
• Terrain and weather: Mountains, deserts, monsoons... you'll be slowed down constantly.

To be honest, a realistic estimate? I dunno. Years, probably many. Forget the 8000 hour thing -- that’s pure fantasy. It’s way longer than I initially predicted. Its gonna take way, way longer.

How long would it take to travel 1 light year away from Earth?

Okay, a light year...how long?

Apollo speeds, like, 39,400 km/h? Wow. Still takes 27,000 years. Wait, one light year = 27,000 years at Apollo speed. Imagine my cats being around that long. Nope!

A plane?! 965 km/h...one million years to travel a single lightyear. One million! Holy moly! That's longer than humans have been around... pretty sure. Wonder what they’d serve on the plane after, like, 500,000 years. Bad jokes, sorry!

• Apollo speed: ~39,400 km/h
• Time to travel 1 lightyear (Apollo): ~27,000 years. Ugh.
• Plane speed: ~965 km/h
• Time to travel 1 lightyear (Plane): ~1,000,000 years. No way.

It's just... mind-boggling. To think about the distances. 27k years, sheesh. Could binge so many shows. Light year, huh, so far away. A million years is actually forever.

How many times can Flash run around the world in 1 second?

Ugh, okay, so like, how many times Flash goes around the world in a sec? It's kinda impossible to say exactly.

You know, Flash's speed? It's all over the place! In the comics, TV shows, movies – it's never the same.

He's, like, super fast, obviously, sometimes faster than light. But calculating that? Forget about it! There just isnt, like, one speed.

• Problem: No consistent speed is ever used.
• Inconsistent Speed: Depends on the writer, episode, etc.
• Light Speed?: Sometimes he goes faster, or at light speed.

My cousin, Sarah, she tried to figure it out once. She uses way too much math lol.