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.
The planet Uranus was discovered by William Herschel on March 13, 1781. He discoverd Uranus while surveying stars in the night sky using a telescope that he had built himself.Herschel noticed that one of these stars seemed different, and after observing it many more times, noticed that it orbited the Sun.He calculated that Uranus had an orbit that was about 18 times farther from the Sun than Earth. Herschel also discovered two of the moons of Uranus (Titania and Oberon).erschel noticed that one of these stars seemed different, and after observing it many more times, noticed that it orbited the Sun. He calculated that Uranus had an orbit that was about 18 times farther from the Sun than Earth. Herschel also discovered two of the moons of Uranus (Titania and Oberon).