October 16, 2011 17:01
The space agency NASA is discussing the possibility of sending a robotic device to Uranus — the seventh planet from the Sun in our system.
Until now, Uranus close range only saw the probe Voyager 2, which flew by the planet in 1986.
Proposed mission provides for a machine that rotates around Uranus just as it does around Saturn Cassini and Galileo around Jupiter in the past, reports CyberSecurity.ru.
Flight automatic probe to Uranus is proposed for the 2020s, when Uranus will be in the best position to access orbit from Earth. Cost of a new apparatus for the study of Uranus should be drawn up from 1.5 to 2.7 billion dollars.
At the time, the probe Voyager 2 flew 80,000 km from Uranus, transmitting data about the appearance of the planet, its rings and its five largest moons. In addition, he discovered 10 previously unknown moons.
Also by Voyager 2 found that day on Uranus is 17 hours, 14 minutes, and the magnetic field of the planet — "a great and strange." It was also found that the poles of Uranus receive more sunlight than its equator, but nevertheless, that the temperature at the poles, which is almost the same at the equator.
Unlike the gas giants — Jupiter, Saturn, and consisting mainly of hydrogen and helium in the interior of Uranus and Neptune in common with him no metallic hydrogen, but a lot of high-temperature modifications of ice — for this reason, experts have identified the two planets in a separate category of "ice of giants. "
The basis of the atmosphere of Uranus are hydrogen and helium. In addition, it found traces of methane and other hydrocarbons, as well as clouds of ice, solid ammonia and hydrogen.
It is the coldest planetary atmosphere of the solar system with a minimum temperature of minus 224 degrees Celsius. It is believed that Uranus has a complex layered structure of clouds, where water is the bottom layer, and methane — the top.
Unlike Neptune, Uranus subsoil consists mainly out of ice and rock.
Just like the other gas giants solar system, Uranus has a system of rings and magnetosphere, and in addition, 27 satellites.
Uranus orientation in space is different from other planets in the solar system — with its axis of rotation is as if "on the side" with respect to the plane of the treatment of the planet around the Sun. As a result, the planet is facing the sun alternately north pole, the south, the equator, the mid-latitudes.
In 1986, Voyager 2 passed Uranus to Earth shots from close range. They show "inexpressive" in the visible spectrum of a planet with no cloud bands and atmospheric storms typical of other giant planets.
Currently, however, ground-based observations could discern signs of seasonal change and increased weather activity in the world, due to the approach of Uranus at its equinox. Wind speeds on Uranus can reach 240 m / s.
But in the magnetic field of Mercury recently discovered strange anomalies.