POPULARITY
Bon départ: beginners’ French second edition - for iPod/iPhone
Transcript -- Several people introduce their family members
Transcript: Several hundred years ago the astronomer J. Bode noticed a peculiar thing about the spacings and distances of the planets from the Sun. If, for example, you take a sequence of numbers that double, add four to each one and divide by ten you end up almost exactly predicting the distances of the planets from the Sun in units of astronomical units, the Earth-Sun distance. You can see this from the sequence of distances quoted in astronomical units: Mercury at 0.4 AU, Venus at 0.7, Earth at 1.0, Mars at 1.5, then the asteroid belt at 2.8, Jupiter at 5.2, Saturn 9.5, Uranus 19.2, and Pluto at 39.4. This is roughly a sequence of doubling distance. The only planet that doesn’t fit is Neptune, and of course the asteroid belt is not a planet. This peculiar spacing or regularity in the distances of the planets from the Sun is not explained by Newton's law of gravity, but must somehow be to do with the way that the planets formed out of the solar nebula.
Transcript -- Several small businesses explain how they have used public relations to help their businesses grow and make an impact.
Transcript -- Several independent retailers explain why they are a preferred alternative to the high street.
Transcript -- Several small businesses explain how they have used public relations to help their businesses grow and make an impact.
Transcript -- Several independent retailers explain why they are a preferred alternative to the high street.
Transcript -- Several people share their experiences of prescribed and recreational drugs.
Transcript -- Several people share their experiences of prescribed and recreational drugs.
Transcript -- Several 'Darwin Now' projects have focussed on bringing young people together to discuss Darwin and his legacy. Events and conferences have been taking place both in Britain and in Egypt.