about Neptune planet. वरुण ग्रह के बारे में... #study #science #upsc
Channel: study news
Date: 2020-07-27

Neptune is the eighth planet from the Sun in our solar system. It is the fourth largest planet in the solar system by diameter and the third largest planet by mass.
Its diameter is 49424 kilometers.
It takes about 164 .79 years for Neptune to do a complete orbit of the sun, it is one of the four planets in our solar system called gaseous planets. Is very large. The remaining three gaseous planets are Jupiter, Saturn and Uranus.
In addition to the ice water in Neptune's atmosphere, there is also snow in the ammonia and methane gases. That's why astronomers sometimes call this planet by the name "Ice Gas Monster".
This unknown planet was first sighted from the telescope on 23 September 1846 and was named "Neptune". "Neptune" was the god of the sea in ancient Roman religion, the place which is the "Varuna" deity in ancient India, so this The planet is called Varuna in Hindi. In Roman religion, Neptune had a trident in his hand, so Varun has an astronomical symbol.
The planet Neptune looks like a circle on which there are no marks or spots, clouds, storms and change of weather are clearly visible on  Neptune. It is believed that the storm wind on Neptune is faster than any planet in the solar system and speeds up to 2,100 km per hour have been observed.
When the Voyager II vehicle passed by Neptune in 1989, Neptune saw a "big thick spot", which has been compared to Jupiter's "big red spots". Because Neptune is so far away from the sun, its upper atmosphere is very cold and the temperature there can fall to -128 ° C (55 Calvin). Due to its large size, the temperature of the planet reaches 5000 ° C due to the high pressure of its gravity in the center of the planet. There are also some scattered rings around Neptune which were seen by Voyager II. The light blue color of Neptune is due to the methane gas present in its upper atmosphere.
Voyager II
The Vyzer II was an American unmanned interplanetary probe that was launched by the US space agency NASA on 20 August 1977 before Vyzer 1. It was very similar to its former version Vyzer 1, but its travel path was somewhat different from that. Is slow. The reason for keeping it slow was to make its path favorable for reaching Uranus and Neptune. When Saturn came in its path, due to its gravity, it was headed towards Uranus and due to this it was also like Jupiter 1 The moon could not observe Titan. But it was still the first to reach Uranus and Neptune. Due to this, there was a huge savings in its energy and it used the gravity of the planets.


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