Quiz

BuzzFeed Staff

BuzzFeed

They're pretty...out of this world, amirite?

Eles são realmente...de outro mundo, não é?

Você sabe mais sobre os planetas do que um aluno do quinto ano?

Do You Know More About The Planets Than A Fifth-Grader?

Do You Know More About The Planets Than A Fifth Grader?

There _were_ nine until [Pluto](http://solarsystem.nasa.gov/planets/pluto) was downgraded to a dwarf planet. We miss you, buddy.

how many planets are there in our solar system?

Even though it's a total planetary diva, [no one put a ring on Venus](http://solarsystem.nasa.gov/planets/). But guess what? Someone really liked the gas planets in our solar system, because they ALL have rings!

Venus

which of these planets DOESN'T have rings?

ISN'T IT BEAUTIFUL? Like Jupiter and Saturn, [Uranus](http://solarsystem.nasa.gov/galleries/gas-giant-interiors) is mainly composed of hydrogen and helium.

Uranus

Even though it's farther from the sun than Mercury, [Venus is the hottest planet](http://solarsystem.nasa.gov/planets/venus) in our solar system because its atmosphere is better at trapping and retaining heat. In fact, it's so hot on Venus that you can melt lead on the surface.

which is the hottest planet in our solar system?

Although, yes, the outer planets are gaseous and larger and farther away from the sun than the inner planets, the _physical entity_ that separates them is an [asteroid belt](http://solarsystem.nasa.gov/planets/asteroids/indepth) between Jupiter and Mars.

Asteroid belt

what physical entity separates the inner planets from the outer planets?

There are [four planets each](http://solarsystem.nasa.gov/planets/solarsystem) in the outer AND inner solar systems. They would make great rival polo teams.

how many planets are there in the outer solar system?

Neptune is the farthest planet from the sun, and it takes about [165](http://solarsystem.nasa.gov/planets/neptune/indepth) years for this blue giant to make a full rotation around it. Basically, we're seeing Neptune the same way people in the 1850s saw it. Crazy, huh?

Neptune

which planet takes the longest to orbit the sun?

With its abundance of carbon dioxide, Venus _might_ be super gassy, but like its fellow inner planets Mercury, Earth, and Mars, it has a [solid crust](http://solarsystem.nasa.gov/planets/venus/indepth).

Yup, this windy planet is the baby! Not by much, though. [Neptune's diameter](http://solarsystem.nasa.gov/planets/neptune/faq) is 49,244 km and Uranus, which is only _slightly_ bigger, has a diameter of 50,724 km.

which gaseous planet has the smallest diameter?

That's because [Jupiter is HUGE](https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-jupiter-58.html) and has a strong gravitational pull. Just think of Jupiter as a very enthusiastic hugger!

how many pounds would a 100-pound object weigh if you were to set it on one of Jupiter's clouds?

Isn't that wild? Think about how big Jupiter and Saturn are. Those gas giants and every single other planet can [fit between our planet and our moon](https://www.buzzfeed.com/kellyoakes/space-is-big?utm_term=.xj5vAdmWA#.cmwLKJGkK), and the moon STILL has such an effect on our tides while shining so bright and beautifully in our sky.

True

True or false: All of the other planets in the solar system can fit between the Earth and the moon.

And some of Saturn's rings are [thousands of miles wide](https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/ring-a-round-the-saturn.html). It would take over a week to drive over some of them. We are so, so tiny.

Over 700

Mars has two little moon sons called [Phobos and Deimos](https://mars.nasa.gov/allaboutmars/extreme/moons/), named after the Greek gods of fear and panic respectively. They look kind of weird for moons and are shaped like potatoes. #same.

Hence Mercury being aptly named after the [Roman messenger god](https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-planet-mercury-58.html).

88 days

how many Earth days does it take Mercury to orbit the sun?

Venus takes [5,832](https://spaceplace.nasa.gov/days/en/) hours to make a full rotation on its axis — BACKWARD, might I add (relative to the other planets). That's about 243 Earth days. Ma'am.

There are [several theories](http://curious.astro.cornell.edu/about-us/56-our-solar-system/planets-and-dwarf-planets/general-questions/247-what-direction-do-planets-rotate-beginner) as to why. One theory is that these planets were hit by large objects that changed their rotation early on.

Venus and Uranus

which planet(s) spin in the opposite direction of all the others?

The [two planets](https://image.gsfc.nasa.gov/poetry/venus/q328.html) closest to the sun don't have any moons. Why? Well...because they're close to the sun. With the sun's gravitational pull, the margin for a stable moon orbit is very narrow. Chances are high that they would be tractor-beamed into the sun and destroyed. ¯\\\_(ツ)\_/¯

Mercury and Venus

Sorry, Mars :(. At least you have your two moons to keep you company. [Venus](http://solarsystem.nasa.gov/planets/venus) has no moons!

Oh no! You've forgotten almost everything you learned from your elementary school space unit! The planets feel neglected. Maybe it's worth giving it another go?

Not too shabby, but you can probably do even better. Take a gander at the night sky and try again.

Hey, your memory for space facts is OUT OF THIS WORLD. You deserve your very own rocket ship to the stars. Congrats!

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Do You Know More About The Planets Than A Fifth-Grader?

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