text: In the passage it states that there has not been a rover or a unmanned spacecraft sent to Venus in more than three decades. The reason that there hasnt been a manned mission before is that no spacecraft or rover has survived more than a few hours. Venus has a thick atmosphere that blankets the planet that contains 97 percent carbon dioxide. The planet also has a even more challenge to overcome,the clouds of highly corrosive acid hovering Venus has destroyed spacecrafts that have gone through them. The surface tempature of Venus is 800 degree Farenheit, and the extreme pressure on the planet is 90 greater than Earths. Venus has the hottest surface temperture in our solar system, even though Mercury is closer to the sun the additional forces on the planets surface and atmosphere such as; volcanoes, lighting storms, and very powerful earthquakes has the planet at the extreme tempertures it has.