Mars: Survival Requirements
Humans will need self-sustaining water, food, and oxygen to survive on Mars. Extracting water locked up in ice will be crucial, but with the recent discovery of flowing water on Mars, it may not be too difficult. Mars One also plans to send a water extractor to heat the soil until the water evaporates.
Mercury: Closest Planet to the Sun
Mercury: The closest planet to the sun. Zipping around the sun in only 88 days, Mercury is the closest planet to the sun, and it’s also the smallest, only a little bit larger than Earth’s moon.
Uranus: Position and Discovery
Uranus is the seventh planet from the Sun, and has the third-largest diameter in our solar system. It was the first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel, although he originally thought it was either a comet or a star.
Celestial Comparisons
If you divide the volume of the sun by the volume of the Earth, you get that roughly 1.3 million Earths can fit inside the sun. The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
Proxima b: Nearest Habitable Planet
Dubbed Proxima b, the exoplanet is not only the closest exoplanet to Earth – its host star is located over 4.24 light-years away – it was also considered the most promising place to look for signs of extraterrestrial life.
Exoplanets and Solar System
All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets.