Inner+planets

The planets closest to the sun are called the inner planets.These planets are mercury, Venus,earth & mars.They are also known as the terrestrial planets because they are similar to the earth.Mercury is the planet closest to the sun and it circles the sun every 88 days.Mercury was names after the messengers of the gods who moves quickly because it rotates on its axis every 59 days.Venus is the second planet from the sun and has an orbital period of 225 days.Venus is known as the earths twin because they have many things in common like size,mass, and density.The biggest difference between them is the atmosphere.Venus’s atmospheric pressure is about 90 times the pressure on earth.venus's atmosphere has a big concentration of carbon dioxide. There for it is 96% carbon dioxide.Venus seems to be one of the brightest objects in the night sky besides from the moon & stars.since venus is near the sun venus is usually visible only in the early morning or evening thats why its sometimes known as morning star or evening star.