(4 March 1923 – 9 December 2012) was the of British television astronomers, boasting a long career in , a quick-fire manner of speech, and a number of eccentric habits, including the wearing of a .
On 1 April 1976, Moore stated to radio listeners that an astronomical event would take place at 9:47 a.m. that day, a of Jupiter and Pluto, which was expected to have an effect observable everywhere. As Pluto passed behind Jupiter, it would briefly cause a powerful combination of the two planets' forces which would noticeably decrease gravity on Earth. If listeners were to jump into the air at that exact moment, they would find they felt a floating sensation

Soon after 9:47 on that morning, the began to receive hundreds of telephone calls from people reporting they had observed the decrease in gravity. One woman who called in even stated that she and eleven friends had been sitting and had been "wafted from their chairs and orbited gently around the room"