how is the atmosphere there ?
There is no well-defined solid surface within Uranus's interior, the outermost part of Uranus's gaseous envelope that is accessible to remote sensing.
Uranus
Although there is no well-defined solid surface within Uranus's interior, the outermost part of Uranus's gaseous envelope that is accessible to remote sensing is called its atmosphere. 
when was uranus first discovered and by who Sir William Herschel discovered it on 13 March 1781. is this a planet ? Yes, Uranus is the seventh planet from the Sun. how is the climate here ? It is the coldest planet in the Solar System. what is its reference in culture ? In astrology, it is the ruling planet of Aquarius. has is it been explored ? Yes, In 1986, NASA's "Voyager 2" interplanetary probe encountered it.
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Uranus [SEP] Atmosphere
Although there is no well-defined solid surface within Uranus's interior, the outermost part of Uranus's gaseous envelope that is accessible to remote sensing is called its atmosphere. Remote-sensing capability extends down to roughly 300 km below the level, with a corresponding pressure around and temperature of . The tenuous thermosphere extends over two planetary radii from the nominal surface, which is defined to lie at a pressure of 1 bar. The Uranian atmosphere can be divided into three layers: the troposphere, between altitudes of and pressures from 100 to 0.1 bar (10 MPa to 10 kPa); the stratosphere, spanning altitudes between and pressures of between (10 kPa to 10 µPa); and the thermosphere extending from 4,000 km to as high as 50,000 km from the surface.