4 Quotes Tagged: astrophysics

We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet.

I believe a partial answer can be found in the responses made to the Mariner IV findings by political leaders, by Mr. Billy Graham, and by other American divines - often sure barometers of common attitudes. They were unmistakably relieved. Finding life beyond the Earth - particularly intelligent life, although this is highly unlikely on Mars - wrenches at our secret hope that Man is the pinnacle of creation, a contention which no other species on our planet can now challenge. Even simple forms of extraterrestrial life may have abilities and adaptations denied to us. The discovery of life on some other world will, among many things, be for us a humbling experience.

60,000 kilometres per second may be the practical (!) speed limit for space travel

Professor Napier and his colleague Victor Clube, formerly dean of the Astrophysics Department at Oxford University, go so far as to describe the 'unique complex of debris' within the Taurid stream as 'the greatest collision hazard facing the earth at the present time.' Coordination of their findings with those of Allen West, Jim Kennett, and Richard Firestone, as led both teams — the geophysicists and the astronomers — to conclude that it was very likely objects from the then much younger Taurid meteor stream that hit the earth around 12,800 years ago and caused the onset of the Younger Dryas. These objects, orders of magnitude larger than the one that exploded over Tunguska, contained extraterrestrial platinum, and what the evidence from the Greenland ice cores seems to indicate is an epoch of 21 years in which the earth was hit every year, with the bombardments increasing annually in intensity until the fourteenth year, when they peaked and then began to decline before ceasing in the twenty-first year.