The immediate cause of sudden cardiac arrest is usually an abnormality in your heart rhythm (arrhythmia), the result of a problem with your heart's electrical system.
Version for printing. The first planet to be discovered was Uranus by William and Caroline Herschel on 13 March 1781. It was discovered by the fact that it showed a disk when viewed through even a fairly low powered telescope. The only other planets which have been discovered are Neptune and Pluto.
by Fraser Cain on November 27, 2009. Even in ancient times astronomers knew of 5 planets: Mercury, Venus, Mars, Jupiter and Saturn. But it wasnât until the last few hundred years that the next planet was finally discovered â Uranus.So when was Uranus discovered? Uranus was found on March 13th, 1781 by Sir William Herschel of England.Uranus, seen by Voyager 2. Image credit: NASA/JPL. You might be surprised to know that Uranus is actually bright enough to be seen with the unaided eye.e thought he might have found a nebular star or a new comet. When he presented his findings to the Royal Society, the Astronomer Royal Nevil Maskelyne discovered that it actually had a planet like orbit and didnât seem to posses a tail. It was the first new planet discovered in history.