10 facts about Mercury

Mercury is the closet planet to our star, the sun. Due to this mercury is always the first planet to orbit the sun in our Solar System. 

Mercury data

Diameter: 4,879 km

Mass: 3.29 × 10^23 kg

Orbit Distance: 57,909,227 km or 57,909,227,000 m

Orbit Period: 88 days

Surface Temperature: -173 to 427 °C or -279.4 to 800.6 

How long is a year on Mercury in Earth days

Would you like to know how to live longer? Simply get on a rocket and fly to Mercury pretending you didn't die from the elements of course.

A Mercury year is only 88 days. But the crazy thing is, it takes 58d 15h 30 m for one day on Mercury to occur. Since Mercury is so close to the Sun it is being tidally locked this means Mercury rotates on its axis exactly three times for every two revolutions it makes around the Sun. 

So if you ever want a tan instantly just go to Mercury. 

What is the smallest terrestrial planet

The smallest planet in our Solar System is Mercury. The smallest planet used to be Pluto. But astronomers said Pluto wasn't deserving enough to be a planet.

Pluto has a diameter half of Mercury's.

Just to help you understand how small Mercury is, you should know that the largest moons of Saturn (Titan) and Jupiter (Ganymede) are larger than Mercury. 

Does Mercury have an atmosphere yes or no

Yes, Mercury does have an atmosphere. For a long period of time astronomers believed Mercury didn't have an atmosphere. Turnout Mercury does have an atmosphere. It's just a very thin one. The planet's atmosphere is constantly being blown away into space due to pressure from sunlight and solar wind.  

Why isn't mercury the hottest planet 

Mercury is the closet Planet to the Sun, so you would assume that it was the hottest. But it isn't. This is because at night Mercury loses almost all of its heat on the planets surface because it has almost no atmosphere. During the day Mercury is 430 °C but at night drops to -363 °F (-184 °C).

When was mercury discovered and by whom 

Mercury doesn't have an official discoverer because it was one of the planet that was visible to the naked eye.   

Astronomers Galileo Galilei and Thomas Harriot were the first to observe Mercury with telescopes in the seventeenth century. 


 telescope mercury thomas hariot

Who is Mercury named after

The Planet Mercury is named after Hermes the swift footed Roman messenger god. Hermes was the god of translators. He was the most clever of the Olympians and was a messenger for all the gods. He controlled wealth, fortune, fertility and thievery. 

Mercury was named after Hermes because the planet revolves quickly around the Sun.

In modern Greece, they call Mercury Emus, which is a slight variation of the original name Hermes.    



hermes mercury

Mercury survived impact

Scientists believe that a huge asteroid hit Mercury about 4 billion years ago. Scientist have this hypothesis because there is a crater on Mercury 960 miles (1,545 km) across, that's bigger than Texas. Scientists believe that the asteroid must've been 60 miles wide.

How many moons does mercury have

Mercury has zero moons. Mercury has no moons, I know its shocking. But why? Why does Mercury have no moons. Mercury has a crater so its possible that the debris was going to form a moon but it wasn't large enough so it couldn't undergo hydrostatic equilibrium (become spherical).

Mercury exploration

Mercury was first visited on Nov. 3, 1973, by Mariner 10. The Mariner 10 was launched from NASA's Kennedy Space Center, its job was to take picture of Mercury and Venus. Anyways the Mariner 10 imaged 45 percent of Mercury's surface, the Mariner 10 also detected Mercury's magnetic field. 

The mission was completed with 98 million dollars.  


mercury exploration 












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