00:00Alrighty then, are you ready to test your knowledge of the Universe? We've got 40
00:04questions for you. Let's see how long you can last!
00:07Now let's get going with the easy level. Can you guess the celestial body from this
00:13photo? With those famous rings, of course it's Saturn!
00:25What force keeps us grounded on Earth? Magnetism, gravity, or friction?
00:37It's gravity, the same force that put an apple on Newton's smart head.
00:42The moon is an asteroid, a satellite, or a planet.
00:53The moon is a natural satellite of Earth. Which star is closest to our planet? The
00:59North Star, Alpha Centauri, or the Sun? Well, it would be weird if it wasn't the Sun.
01:12Pluto is a dwarf planet. Is this true or false? The answer is true. Poor Pluto got
01:26kicked out of the main planet sequence, but joined its own family of dwarf planets in
01:31our Solar System. What is the largest planet in our Solar System?
01:36Jupiter, Pluto, or Earth? It's Jupiter, the gas giant.
01:48What planet is known as the Red Planet? Venus, Mars, or Jupiter?
02:00It's Mars. NASA's Curiosity rover showed us all its awesome red-orange desserts. Wait
02:07a minute, I mean deserts. My bad. The Sun is a planet, a comet, or a star?
02:22The Sun is a star, which was kinda spoiled in question 4.
02:27What event marks the beginning of the universe according to science? The Great Fission, the
02:32Big Bang, or the Huge Boom? The answer is the Big Bang, hence the name
02:42Big Bang Theory. Black holes exist, true or false?
02:57The answer is true. We weren't sure before, but now we have even two photos of them.
03:03How many did you get? Write in the comments. Now let's move to the medium level.
03:10Guess the name of this scientist. This is a portrait of Albert Einstein.
03:25What can we call a group of stars forming a recognizable pattern? A galaxy, constellation,
03:31or nebula? It's a constellation. Although to be fair,
03:40galaxies and nebulas are also full of stars in different patterns.
03:44What is this phenomenon called? A lightning bolt, a shooting star, or an aurora borealis?
03:57This is a shooting star. Hey, make a wish! What is the smallest planet in our solar system?
04:03Venus, Mercury, or Mars? The answer is Mercury. Remember that Pluto is a dwarf planet.
04:19How many planets are in our solar system? Give yourself some time to count.
04:31We have 8 major planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and
04:38Neptune. Who is the first person to walk on the Moon?
04:42Jeff Bezos, Neil Armstrong, or Elon Musk? Neil Armstrong – he's the only astronaut
04:55on the list. What is the name of our galaxy? The Milky
05:00Way, the Andromeda Galaxy, or the Steel Way? The Milky Way, like the chocolate bar. And
05:11the Andromeda Galaxy is our nearest neighbor. Man has already walked on Mars. Is this true
05:17or false? The answer is false. Only robots have been
05:30on Mars. But NASA believes that the first human Mars mission will take place in the
05:342030s. Saturn is a gas planet, Earth-like planet,
05:40or dwarf planet. Saturn is a gas giant, just like Jupiter.
05:52They're the biggest planets in our solar system. The Earth rotates on its own axis.
05:57True or false? It's true. The Earth rotates while it revolves around the Sun, which is
06:11why we have days and nights. Well, that level was a bit tougher. Are you
06:16keeping up so far? Well, prepare for the hard level!
06:22What is this object called? This is actually a telescope. Specifically,
06:36the James Webb Telescope. It's based in space instead of on Earth.
06:41Which of these planets has the most moons? Saturn, the Earth, or Mars?
06:53While we have only one moon and Mars has two, Saturn has 146 moons. All because of its huge
07:00size and crazy gravity. Which planet is the farthest from the Sun?
07:06Uranus, Neptune, or Jupiter? It's Neptune. We mentioned it when counting
07:17the number of planets. It was also in order. How long does it take for light from the Sun
07:24to reach Earth? 8 minutes, 24 hours, or a second? Remember that light also travels at
07:31a certain speed. It's 8 minutes, 20 seconds. The speed of light is 186,000 miles per second.
07:40What is the hottest color for a star? Yellow, orange, or blue-white?
07:52The answer is, surprisingly, blue or blue-white. A bit counterintuitive, right?
07:59What is the true color of the Sun? White, yellow, or red?
08:10The answer is white. This makes sense because we know that white light, which comes from
08:15the Sun, breaks down in all the colors. So we only see the Sun as yellow because the
08:20atmosphere filters some of them. Earth has the most volcanoes in our solar
08:25system. True or false? It's false. Venus is the one with most of the volcanoes. It's
08:39actually the most toxic and crazy planet in our solar system.
08:44What is the name of the galaxy closest to the Milky Way? If you watch the video carefully,
08:49you'll get this one. It's the Andromeda Galaxy. But while it's our closest neighbor,
09:00it's still 2.5 million light-years away. What is the coldest planet in our solar
09:06system? Uranus, Neptune, or Pluto? It's Uranus. Pluto's not a planet. And you
09:19think that it should be Neptune since it's farther away from the Sun, and average temperatures
09:24on Neptune are colder, minus 330 degrees Fahrenheit. But the lowest number, about minus 371 degrees
09:32Fahrenheit, was recorded on Uranus. So this place can also be considered the coldest planet.
09:40Which planet has the most moons? Well, we mentioned this one before. It's Saturn with
09:54an insane number of moons. Ooh, pat yourself on the shoulder for that one. Finally, let's
10:00tackle the impossible level. Good luck! What's the maximum speed of light in a vacuum?
10:07A million miles per second, 186,000 miles per second, or 42 miles per second? If you
10:14don't know, try to guess this one. It's 186,000 miles per second. And the distance
10:20that light covers in one year of traveling is called one light-year.
10:26On which planet can you jump the highest? The Earth, Venus, or Mercury? On Mercury!
10:39It's the smallest and lightest planet in our solar system, so the gravity there is
10:43very weak. What is the main component of the Sun? Oxygen,
10:48hydrogen, or nitrogen? The answer is hydrogen. It's what makes up
11:00most stars, and it's the most common element in the entire universe.
11:05What is the approximate age of the universe? 3 billion years, 13.8 billion years, or 100
11:11billion years? Well, it's 13.8 billion years. Meanwhile, our Sun is about 4.6 billion years
11:22old. Hey, I wasn't around then. Guess the name of this guy. This is a portrait
11:39of Isaac Newton. What is the hottest planet in our solar system?
11:44Venus, Mercury, or Earth? Well, you might think it's Mercury because
11:55it's closest to the Sun, but it's actually Venus. Like we said, it's the most toxic and
12:00volcanic planet we have around here. What type of star is the Sun classified as?
12:06A red giant, a white dwarf, or a yellow dwarf? Even though the Sun's light is white, the
12:18Sun is a yellow dwarf, one of the colder star types.
12:23There's a black hole in the center of most big galaxies. True or false?
12:35It's actually true. While they don't suck in the entire galaxy, supermassive black holes
12:40usually hang out in the centers. What phenomenon causes the northern lights,
12:46Earth's magnetic field, cosmic rays, or black holes?
12:56It's the Earth's magnetic field. When Sun particles reach the Earth and interact with
13:00the atmosphere, they release bright energy, which causes beautiful colors in the sky.
13:07Time for some math! If the speed of light is 186,000 miles per second and it reaches
13:12the Earth in 8 minutes, what is the distance between Earth and the Sun?
13:18Bonus points for calculating this in your mind! It's about 93 million miles.
13:28Did you crack the impossible level? Alright, let's see if you're smart enough to answer
13:33the final bonus question! If you were standing on the Moon, and the
13:37Earth was directly overhead in the lunar sky, how often would you see the Earth rise or
13:42set? Think about it. The answer is… never! The Moon is tidally
13:53locked to Earth, which means that we can always see its one side, while the other side
13:58is always hiding away from us. Maybe it's shy. So, the Earth would stay nearly fixed
14:04in the lunar sky at all times. So, how many questions did you get? Write
14:10it down in the comments below!
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