Ever wondered if what you know about space is really true? We've got a video that's going to blow your mind! Join us as we debunk some of the most common space "facts" that are actually total myths. From the truth about black holes to the real reason why the sky is blue, you won't believe what you've been told. It's like a cosmic reality check that'll leave you questioning everything you thought you knew about the universe. So, sit back, and get ready to have your mind expanded in ways you never imagined. Don't miss out on this eye-opening journey through the cosmos!
00:04It's a vast and mysterious expanse that has fascinated us for centuries.
00:09But as much as we've learned about it,
00:11there are still plenty of things that we've been lied to about when it comes to space.
00:16Let's take a look at some of the biggest lies we've been told about this topic.
00:21First off, we have the idea that space is just this pristine, untouched wilderness.
00:27But that's not exactly true.
00:28We've been littering space with our debris for decades.
00:32Everything from old satellites to rocket parts.
00:36In fact, there are over 20,000 pieces of debris orbiting Earth right now.
00:41And they're causing all sorts of problems for future space missions.
00:45So if you're planning on visiting space anytime soon, watch where you go.
00:49You never know what kind of garbage might be floating around.
00:54Did you know that the sun is not actually yellow?
00:57It's green.
00:58Well, kind of.
00:59You see, scientists measure the temperature of a star by the color spectrum it emits.
01:05Cooler stars appear red, while the hottest of stars look blue.
01:09Our sun emits most of its energy at a wavelength that's close to green.
01:14But because it emits other wavelengths, too, all these colors mix together, and your eyes see this vibrant mixture as white.
01:23From Earth, however, the sun looks yellow, because our atmosphere is really good at scattering blue light.
01:29If our star was actually yellow, Earth would become a frozen rock, and we'd all be polar bears.
01:35Plus, the sun isn't on fire for real.
01:37Plus, the sun isn't on fire for real.
01:40It's a big ball of gas, mostly made of hydrogen and helium.
01:44And it works more like a gigantic nuclear reactor, constantly fusing hydrogen atoms to create helium inside its core.
01:51This process releases enormous amounts of energy.
01:55That's why the sun is so hot.
01:56Oh, and speaking of setting things on fire, explosions in space aren't real.
02:03Sorry, Star Wars fans.
02:05A spaceship can't go down in a violent blast, because there is no air out there in space.
02:11No air means no oxygen, and no oxygen means no fire.
02:17Now, you might also think that there are too many stars in the night sky for you to count.
02:22But, in fact, you can do that.
02:24According to the Yale Bright Star Catalog, there are 9,110 stars that you can see from Earth with the unaided eye.
02:33So, technically, you can count them, but I wouldn't be surprised if you lost count.
02:40And if you're worried about flying through an asteroid belt, don't be.
02:44Although it does have trillions of space rocks that range in size from space dust to a quarter of the size of the Moon,
02:51they're very spread out.
02:53The asteroid belt between Mars and Jupiter is 140 million miles across,
02:59which is one and a half times the distance between Earth and the Sun.
03:03This spreads space rocks thousands of miles apart,
03:06making it almost impossible for a spacecraft to collide with one.
03:10You'll instantly freeze in space without a suit.
03:15Nope, you won't turn into a popsicle right away.
03:18It's going to take a bit longer than that because heat and cold don't really move very quickly in the vacuum of space.
03:24But, unfortunately for you, there's a bigger problem at hand.
03:28You won't be able to breathe.
03:30After just 15 seconds, your brain won't be getting enough oxygen from your blood, and you'll pass out.
03:36And then, after just two minutes, it's curtains for the rest of your organs.
03:41So, in short, if you find yourself playing astronaut without a space suit, it's game over pretty quickly.
03:47Did you know that space doesn't have any temperature at all?
03:53That's because the temperature is defined by the speed at which particles move and the amount of energy they have.
04:00In the true vacuum of space, there are no particles to move around, making it temperatureless.
04:06Of course, some parts of space are really hot, like areas around stars.
04:11But the further away you get from stars, the more spread out particles are, making those areas of space pretty chilly.
04:20Number 9 is our planet's shape.
04:23No, it's not flat, but it's not a perfect sphere either.
04:26Yeah, it bulges at the equator because of our planet's wild spin.
04:31It's like Earth is doing its own little dance.
04:34And because of this bulging, launching spaceships from the equator is much easier than from the poles.
04:42Now, when it comes to sound in space, it's a bit of a tricky situation.
04:47You might think that no one can hear you scream, but that's not entirely accurate.
04:51The thing is, sound needs something to travel through, like air or water.
04:57In space, things are super spread out, so all those epic space battles and galactic explosions would be completely silent.
05:05Yet, there are some places in space with enough particles for sound to travel through.
05:11For example, you can hear the black hole at the center of the Perseus galaxy cluster.
05:16Another myth is about zero gravity.
05:21That's not a thing.
05:23There's still some gravity hanging around the International Space Station, about 90% of what we feel on good old Earth.
05:29But astronauts get to float around because they're basically free-falling around the planet.
05:34And let's be real.
05:37Hollywood's version of space travel is not factual.
05:40Sure, orbits are a thing, but different altitudes mean different speeds.
05:44So moving from one orbit to another isn't exactly a walk in the park.
05:49You can't just push yourself in the right direction and hope for the best.
05:53You gotta take those orbital velocities into account.
05:56This reminded me of the 2013 movie, Gravity, and how Sandra Bullock tried to survive in space.
06:02Hollywood sure added some fuel to these myths.
06:05Yet again, who can blame them?
06:09Back in 1976, NASA's Viking 1 spacecraft snapped a photo of a curious rock formation on Mars that looked suspiciously like a face.
06:19Some folks out there claimed that it must have been proof of extraterrestrial life on the Red Planet.
06:24But NASA had a different take.
06:28According to the space agency, the face was nothing more than a bunch of rocks piled up in such a way that the shadows they cast created an illusion of facial features.
06:39It turns out it was just a regular hill that got a little too much credit for being photogenic.
06:45The solar system stays in place.
06:49Lie!
06:49It's zooming through space at a speed of 140 miles per second, which means that it's whizzing through the cosmos faster than a cheetah chasing its prey.
07:00It takes us 230 million years for the solar system to complete a full orbit around the Milky Way.
07:07It's a good thing it isn't getting a speeding ticket, because that would be one astronomical fine.
07:13Eh?
07:15Without the Sun, planets would be pretty chilly.
07:18We're talking about temperatures as low as negative 455 degrees Fahrenheit.
07:24Brrrr!
07:24But with the Sun around, the planets get to enjoy much more livable temperatures.
07:30Of course, not all planets are created equal.
07:33Mercury, for example, is the closest to the Sun.
07:36Venus, on the other hand, is farther away, but somehow manages to be even hotter than Mercury.
07:42The distance from the Sun isn't the only factor that affects a planet's temperature.
07:47Other things, like the planet's size and reflectivity, also come into play.
07:51So Mercury being the hottest planet in our solar system is a false proposition.
07:56No, just because it's the closest one to the Sun doesn't mean it's the hottest.
08:01Even though we've been deceived in some ways, that doesn't make space any less amazing.
08:06It's still a vast, beautiful, and utterly fascinating part of our universe.
08:11And there's still so much we have yet to discover.
08:14Who knows?
08:15Maybe one day we'll really discover little green people out there.
08:17Or maybe we'll find out something even more incredible.
08:21Until then, we'll just have to keep dreaming and exploring.
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