Astronomers aided by the &to=http://english.pravda.ru/main/2002/12/02/40259.html' target=_blank>Hubble Space Telescope have spied two more rings encircling Uranus, the first additions to the planet's ring system in nearly two decades.
The faint, dusty rings orbit outside of Uranus' previously known rings, but within the orbits of its large moons, said Mark Showalter, an astronomer at the SETI Institute in Mountain View, California, who made the discovery.
Details will appear online Friday in the journal Science. The discovery, announced Thursday, means scientists now believe the seventh planet from the sun possesses 13 rings.
The Russian Defence Ministry harbours plans to build a deep-water submersible vehicle to reach the bottom of the Mariana Trench