The Sky at Night S18E10 · The Changing Force of Gravity

Overview

Has gravity always been the same? There have been suggestions that the force of gravity today is weaker than it used to be. Patrick Moore and Colin Ronan discuss this fascinating theory and try to decide whether we are all getting lighter.

Torrents

Subtitles

Episodes

1. 1 1. Positional Astronomy1974-01-27Patrick Moore talks about what is on view in the night sky now, and discusses with Gilbert Satter thwaite the important subject of positional astronomy - the exact measurements and
2. 2 2. Saturn - The Ringed Planet1974-02-17Saturn is now very well placed in the evening sky, and a small telescope will show its ring system as well as some of the moons. Patrick Moore and Dr Garry Hunt examine the recent
3. 3 3. The Milky Way1974-03-20The Milky Way, made up of countless faint stars, can easily be seen in the evening sky this month. Tonight Patrick Moore describes this luminous band which stretches from one hori
4. 4 4. Life in the Universe1974-05-15How strong is the possibility of life existing in other worlds in our galaxy and elsewhere in the universe, and if it does, where is the nearest life likely to be and how could we
5. 5 5. The Daylight Star1974-06-12The Sun is the only star near enough for us to study in detail. Patrick Moore discusses with Dr Ron Maddison the mysterious cycles of activity which cause spots and vast looped pro
6. 6 6. The Heart of the Scorpion1974-07-10Patrick Moore describes the Red Giant star, Antares, in the constellation of Scorpio. It is now visible above the southern horizon; and although it looks like a dot, it is bigger t
7. 7 7. Shooting Stars1974-08-07At this time of the year shooting stars can be seen in profusion, for we are in the middle of the year's richest meteor-shower - The Perseids. Tonight Patrick Moore discusses thes
8. 8 8. Choosing a Telescope1974-09-04What can you see in the night sky with binoculars, or with a small telescope - and how much money must you spend if you need adequate equipment for 'the amateur astronomer'? Patri
9. 9 9. Lord Rosse's Great Telescope1974-10-02A century ago, the most powerful telescope in the world was the great 72-inch reflector at Birr Castle in Eire, with which its builder, the 3rd Earl of Rosse, discovered the spiral
10. 10 10. The Changing Force of Gravity1974-10-30Has gravity always been the same? There have been suggestions that the force of gravity today is weaker than it used to be. Patrick Moore and Colin Ronan discuss this fascinating t
11. 11 11. Eros - Wanderer in Space1974-11-26This winter the minor planet Eros is due to approach the Earth as closely as it will ever do. Patrick Moore talks with Gordon Taylor of the Royal Greenwich Observatory.
12. 12 12. The Year of the Planets1974-12-18During 1974 there have been some important and spectacular space missions. In the spring Mariner 10 sent back the first close-range pictures of cloud-covered Venus and crater-scarr