Discovery of Neptune
Neptune was predicted by mathematical calculations and first observed on Sept 23, 1846 by Johann Gale, Urban Le Verier and John Couch Adams. On August 25, 1989, the Voyager 2 flew past Neptune. This was the first time Neptune was also observed, as it had been "invisible" prior to the invention of the telescope.
So The first people to observe Neptune were the first to discover it. Also Neptune is an outer planet.
So The first people to observe Neptune were the first to discover it. Also Neptune is an outer planet.
Main Things
Neptune(the blue planet) is the last
planet from the sun. The rotation takes 16 hours. the revolution takes 165
years. the diameter is 30,778. the features are that it has 13 moons, sometimes
crosses Pluto orbit, and
has a great dark spot. It also has 9 rings made of "ringlets".
planet from the sun. The rotation takes 16 hours. the revolution takes 165
years. the diameter is 30,778. the features are that it has 13 moons, sometimes
crosses Pluto orbit, and
has a great dark spot. It also has 9 rings made of "ringlets".
Temperature And Gravity
The average surface temperature is -373 Fahrenheit (-225 Celsius). also, while Saturn is a huge planet [9.5 times as large as Earth's diameter and 95 times the mass of Earth], it is not very dense and on its surface you would only weigh a little (6%) more than you do on Earth. Neptune too is much larger than Earth but again the material it is made from is not that dense compared to Earth so the gravity pull on Neptune.
A large spacecraft carrying two probes and a lander would be sent out to investigate the ice planet orbiting in the far reaches of the Solar System some 2.8 billion miles from the Sun.
Until now, the only spacecraft to visit Neptune was Voyager 2, which flew by the giant planet in 1989. Voyager 2, which has traveled to more planets than any other probe in history, probably still will be operating as the new probe arrives at Neptune. However, Voyager 2 will be much farther away, some 10.5 billion miles from the Sun near the edge of the Solar System.
Until now, the only spacecraft to visit Neptune was Voyager 2, which flew by the giant planet in 1989. Voyager 2, which has traveled to more planets than any other probe in history, probably still will be operating as the new probe arrives at Neptune. However, Voyager 2 will be much farther away, some 10.5 billion miles from the Sun near the edge of the Solar System.
Atmospheric Content
Since Neptune's orbit is so far from the sun, it receives a very small amount of heat and indeed the uppermost region of the atmosphere is -218 °C (55 K). There is no solid surface due to the fact that Neptune is a gas giant. Atmospheric temperatures gradually rise as you go deeper inside Neptune due to an internal source of heat. It is thought that this may be leftover heat generated by in falling matter during the planet's birth, slowly radiating away into space right now. Neptune's atmosphere has the highest wind speeds in the solar system, up to 2000 km/h, thought to be powered by this flow of internal heat. The internal structure resembles that of Uranus.