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Answer Quotes - page 68 - Quotesdtb.com
Answer Quotes - page 68
A question which has long troubled astronomers and physicists is what becomes of the energy that is continually being poured out into space by the sun and the stars. To this question a complete answer is given by the new theory. It is used up, diluted, or degraded, by the expansion of the universe. ...the light travelling through the expanding universe and, so to say, trying to reach a particular star, or stellar system, which is continually receding with great velocity, is losing energy in trying to catch up with it. It is this degradation of the light, technically known as the redshift of the spectral lines, by which we become aware of the receding velocities of the extra-galactic nebulae. It can be shown that the decrease of the total amount of radiant energy in the universe by this degradation exceeds the increase by the radiation of the stars. It would not be correct, however, to conclude that the expansion is caused by the energy thus lost by the radiation...
Willem de Sitter
The cell phones in the pockets of the dead students were still ringing when we were told that it was wrong to ask why. As the police cleared the bodies from the Virginia Tech engineering building, the cell phones rang, in the eccentric varieties of ring tones, as parents kept trying to see if their children were OK. To imagine the feelings of the police as they carried the bodies and heard the ringing is heartrending; to imagine the feelings of the parents who were calling - dread, desperate hope for a sudden answer and the bliss of reassurance, dawning grief - is unbearable. But the parents, and the rest of us, were told that it was not the right moment to ask how the shooting had happened - specifically, why an obviously disturbed student, with a history of mental illness, was able to buy guns whose essential purpose is to kill people - and why it happens over and over again in America.
Adam Gopnik