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Proper names of planetary systems often follow common themes – for example, the planets of the star Copernicus are named after European astronomers. Proper names for planets outside of the Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming contests known as NameExoWorlds.
It has gained a measure of fame as it is the longest place name found in any English-speaking country, and possibly the longest place name in the world, according to World Atlas. [3] The name of the hill (with 85 characters) has been listed in the Guinness World Records as the longest place name. Other versions of the name, including longer ...
There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets. As of 6 September 2024, there are 5,756 confirmed exoplanets in 4,297 planetary systems, with 963 systems having more than one planet. [1] Most of these were discovered by the Kepler space telescope.
Temperature. 72 K (−201.2 °C; −330.1 °F) [1] PSR B1620-26 b is an exoplanet located approximately 12,400 light-years from Earth in the constellation of Scorpius. It bears the unofficial nicknames " Methuselah " and "the Genesis planet" (named after the Biblical character Methuselah, who, according to the Bible, lived to be the oldest ...
Astronomical naming conventions. In ancient times, only the Sun and Moon, a few stars, and the most easily visible planets had names. Over the last few hundred years, the number of identified astronomical objects has risen from hundreds to over a billion, and more are discovered every year. Astronomers need to be able to assign systematic ...
Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth and slightly more massive, but denser and smaller, than fellow ice giant Uranus.
In A Greek–English Lexicon, it is defined as a "name of a dish compounded of all kinds of dainties, fish, flesh, fowl, and sauces". [2] It is the longest Greek word, containing 171 letters and 78 syllables. The transliteration has 183 Latin characters and is the longest word ever to appear in literature, according to the Guinness World ...
Planets in the Solar System. According to the IAU definition, there are eight planets in the Solar System, which are (in increasing distance from the Sun): [2] Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Jupiter is the largest, at 318 Earth masses, whereas Mercury is the smallest, at 0.055 Earth masses.