Mercury: The smallest planet in the Solar System
Mercury can only be seen at dawn or sunset. Mercury has no natural satellites, and also has no atmosphere. The planet Mercury is the smallest planet in the solar system with a diameter of 4878 km. Its rotation is very slow, the planet is only making three full rotations in twice revolves around the sun. That’s why one side of Mercury is very hot while the other side is very cold. Temperature reaches 4300 ° C on the part facing the sun, and -2200 ° C at the back to the sun. Because Mercury has no atmosphere, it makes a large temperature difference.
Venus: The Sunrise happens at the West and The Sunset happens at the East
Venus is a very bright planet. Venus is called the morning star and evening star, because the planet is visible in the east as the morning and in the west as twilight. Venus is also called a white planet because its light is white. Venus is almost as large as the earth.
Venus rotation direction is opposite from the direction of other planets rotation, so the sunrise is at the west and the sunset is at the east. In addition, the rotation period of Venus is longer than the period of the revolution around the sun.
Venus's atmosphere is thick and always veiled by clouds. Because of that, so planet Venus becomes the hottest planet in the solar system with temperature of 462°C. Venus does not have a satellite.
Earth: Planet of Life
Planet Earth is the largest of the four terrestrial planets. And Earth also has the highest density, the largest surface gravity, strongest magnetic field, and rapid rotation. Earth is also the only terrestrial planet that has an active tectonics plate. Earth’s atmosphere and the magnetic field protect the Earth's surface from the solar wind, ultraviolet light, and radiation from outer space. Planet Earth is the only planet that supports life.
Mars: Human Face on the Plain of Mars
