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.
Uranus was discovered by William Herschel, who made the announcement on March 13, 1781.It had previously been thought to be a star because it moved only imperceptibly across â¦ the sky. Herschel originally thought it might be a comet.itania and Oberon discovered in 1787 Ariel and Umbriel discovered in 1851 Miranda discovered in 1948 I hope this helps you and by the â¦ way this isn't all of Uranus moons.