venus is the second planet from the sun and it a terestial planet. because it is one of the biggest things in the sky, many civilizations consider it of devine nature or sacred. since earth is the closest planet to earth, sometimes called earth's sister planet, it is a prime target for early inter planetary travel. Venus has an extremely dense atmosphere that consists of 96.5% carbon dioxide, 3.5% nitrogen, and some other gases, because the atmosphere is so thick it causes a much higher surface presure. Due to thermal inertia and the transfer of heat by winds in the lower atmosphere means that the temperature of Venus's surface does not change much. On a mission called Venera 4 in 1967, it found Venus's magnetic field to a lot less stron than earth's. similar to earth's moon, this planet has phases.