#space #planet #star #hottest #coldest #biggest #smallest #oldest #youngest
Our Universe is a big chunk of stars and planets with some pretty extreme environments and weather. Here is a brief list:
Hottest Planet: Having a temperature of over 4,300 degree Celsius, KELT-9b is a Jupiter-type gas giant planet that is so close to it’s star that it only takes 1.5 days to complete 1 revolution. (Earth takes 1 year = 365.25 days)
Coldest Planet: Having a temperature near absolute zero, OGLE-2005-BLG-390Lb is the coldest planet at – 223 degree Celsius. The planet is 5.5 times the mass of Earth and sometimes also referred to Hoth from Star Wars franchise.
Biggest Planet: The planet DENIS-P J082303.1-491201 b, has a mass 28.5 times that of Jupiter. It is often debated whether to categorize it as a star or planet. However, it revolves around a brown dwarf star.
Smallest Planet: Kepler-37b is considered the smallest planet, having a size smaller than Mercury and slightly larger than Moon. The planet lies very close to its star and is too hot to support liquid water.
Oldest Planet: At 12.7 billion years, PSR B1620-26 b is the oldest planet. It is 2.5 times the mass of Jupiter. Considering the universe is 13.8 billion years old, the planet is only a billion years younger.
Youngest Planet: V830 Tauri is a planet that has only been there for 2 million years. The planet is 3/4th the mass of Jupiter and still seems to be growing by frequent collision, making it unsafe.
Planet with the Worst Weather: Since lack of technology prevents us from seeing the weather of planets outside our solar system, Venus is the planet with most extreme weather with temperatures ranging to 462 degree Celsius, and hurricane speeds at 360 km/hr. The planet is made up of 95% Carbon dioxide.
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This is incredible. There are planet with such varied mass, temperatures and weather. We are but a small dot in the universe.