Inner Planets

For my blog post I'm going to talk about the inner planets. I'm going to talk about what the inner planets have in common and the different kinds of atmospheres in the inner planets. I'm even going to tell you why Venus is hotter than Mercury and why there is life on Earth and not on the other planets. 

The four inner planets 

The four inner planets are Mercury, Venus, Earth, and Mars. They are similar because they are made out of rocky materials like rock and they are the closest to the sun. The inner planets are also called the terrestrial planets because they are all made out of rock and metals and the planets have a solid outer layer.

  

This is what the inner planets  might look like

 Mercury

Mercury is the closest to the sun but not the hottest planet. Mercury is also the smallest planet. Mercury has no atmosphere because its gravitational pull is not strong enough to hold the gases close to it surface. Mercury has no atmosphere because its mass is so small. If Mercury has no atmosphere then there is no wind on mercury. 

Mercury

   
Venus
Venus is the second farthest from the sun and the hottest planet. Venus is hotter than Mercury because Venus atmosphere is so dense it is 100x denser than earths so all the gases and heat gets tapped in Venus. Heat gets trapped on Venus and Venus gets so hot that even when it's nighttime its still almost 460 degrees c. 97% of Venus's atmosphere is made up of carbon dioxide. Venus's clouds are made out of vaporized acid so it can burn through steel.

Venus

Earth

Earth is the only known planet with liquid water and life living on it. A small amount of gas and water vapor helps make up Earth's atmosphere. Earth is the third farthest from the sun and is about 1.00 Astronomical Units away from the sun and Earth only has one moon. Earth is the only known planet with life on it because in order to have life you have to have water and air. The temperature of the planet has to be just right so life can not burn to death.   

   

Mars
Mars is called the red planet because of the iron rocks which creates a rusty dust on the planet. Mars atmosphere is thin and is about 90 percent carbon dioxide.  The planet has two moons Phobos and Deimos which might be two captured asteroids. The average temperature on Mars is about 55degrees Celsius. Scientist think there might be life on mars and they think that because of the frozen ice caps on Mars.