Names And Order Of Planets

Ever wondered why we call our cosmic neighborhood the solar system, or why we've got this thing for seven planets? Let's dive in, shall we?

Once Upon a Time, There Were Nine

Back in the day, we thought our solar system had nine planets. Then, in 2006, the International Astronomical Union (IAU) had a meeting that felt like a planetary version of Survivor. They decided that to be considered a planet, a celestial body had to meet three criteria: it had to orbit the sun, be round due to its own gravity, and have "cleared the neighborhood" around its orbit. Pluto, our once beloved ninth planet, didn't make the cut. Sorry, little guy.

So, we were left with eight planets. But wait, there's more! In 2015, the IAU had another powwow and decided that a planet's orbit didn't have to be perfectly circular. This meant that our old friend Pluto could potentially regain its planetary status. But that's a story for another time.

Meet the Gang

Now that we've got the drama out of the way, let's meet the planets that made the cut. They're listed in order from the sun, because, you know, it's all about them.

Mercury: The Speedster

Mercury is the closest planet to the sun, and it's a real hothead. It's so close that it orbits the sun every 88 Earth days. Talk about a fast-paced life! It's also the smallest planet in our solar system, with a diameter of about 4,880 kilometers. That's roughly the distance from Los Angeles to San Francisco.

Venus: The Hottie

Venus is the second planet from the sun and the hottest planet in our solar system. With surface temperatures reaching up to 864°F (462°C), it's hotter than your oven on broil. It's also the brightest planet in the night sky, thanks to its thick clouds that reflect sunlight. Fun fact: Venus spins on its axis in the opposite direction of most planets, including Earth.

All Planets Fact and Solar System Planets in Order

Earth: The Blue Marble

Here we are, the third planet from the sun and the only place we know of that's home to life. We're pretty special, if we do say so ourselves. Earth is the largest of the terrestrial planets (that's planet-speak for "rocky planets"), with a diameter of about 12,742 kilometers. That's roughly the distance from New York to London.

Mars: The Red Planet

Mars is the fourth planet from the sun and the second-smallest planet in our solar system. It's known for its reddish appearance, which comes from iron oxide (rust) on its surface. It's also the most explored planet besides Earth, with numerous rovers and orbiters sent to study it. Fun fact: Mars has the tallest volcano and longest canyon in the solar system.

Jupiter: The Gas Giant

Jupiter is the fifth planet from the sun and the largest planet in our solar system. It's a gas giant, which means it's mostly made up of gases and liquids, not solid rock like Earth. Jupiter is so big that over 1,300 Earths could fit inside it. It's also home to the Great Red Spot, a storm that's been raging on Jupiter for at least 350 years. That's like a hurricane that's been going on since the 1600s!

Saturn: The Ringmaster

Saturn is the sixth planet from the sun and the second-largest planet in our solar system. It's another gas giant, but it's best known for its stunning ring system. Saturn's rings are made up of countless ice particles with a smaller amount of rocky debris and dust. Fun fact: if you could weigh Saturn's rings, they'd only add up to about 75% of the mass of Earth's moon.

Planets In The Solar System Kidspressmagazinecom

Uranus: The Ice Giant

Uranus is the seventh planet from the sun and the third-largest planet in our solar system. It's an ice giant, which means it's made up mostly of ices, such as water, ammonia, and methane. Uranus is also the only planet that rotates on its side, with an axial tilt of 98 degrees. That means it looks like it's rolling around the sun like a log.

Neptune: The Windy One

Neptune is the eighth and farthest-known planet from the sun. It's an ice giant like Uranus, but it's the fourth-largest planet in our solar system. Neptune is known for its strong winds, with speeds reaching up to 1,200 miles per hour (1,930 kilometers per hour). That's faster than the speed of sound on Earth! Fun fact: Neptune takes about 165 Earth years to orbit the sun. That's a long vacation!

So, Why Seven?

You might be wondering, why do we still talk about seven planets when we know there are eight? Well, it's all about perspective. In the Western world, we've been counting the planets based on the order they were discovered, starting with Mercury and ending with Neptune. But in other cultures, like the Chinese, they count the planets based on their size, starting with the largest, Jupiter.

So, whether you count seven or eight, one thing's for sure: our solar system is a fascinating place. And the next time you look up at the night sky, remember that you're just a tiny speck in a vast, cosmic neighborhood.