At two-tenths the speed of light, dust and atoms might not do significant damage even in a voyage of 40 years, but the faster you go, the worse it is space begins to become abrasive. When you begin to approach the speed of light, hydrogen atoms become cosmic-ray particles, and they will fry the crew.... So 60,000 kilometers per second may be the practical speed limit for space travel.
Isaac AsimovRelated topics
abrasive approach begin crew damage dust faster fry hydrogen light limit might per practical second significant space speed travel voyage worse yearsRelated quotes
No one can be saved without divine light. Divine light causes us to begin and to make progress, and it leads us to the summit of perfection. Therefore if you want to begin and to receive this divine light, pray. If you have begun to make progress and want this light to be intensified within you, pray. And if you have reached the summit of perfection, and want to be superillumined so as to remain in that state, pray.
Angela of Foligno
As you know, you go to war with the army you have, not the army you might want or wish to have at a later time. Since the Iraq conflict began, the Army has been pressing ahead to produce the armor necessary at a rate that they believe - it's a greatly expanded rate from what existed previously, but a rate that they believe is the rate that is all that can be accomplished at this moment.
Donald Rumsfeld
Now, since the time of Newton there had been a debate about whether light was a wave---that is, a traveling disturbance in some background medium---or a particle, which travels regardless of the presence of a background medium. The observation of Maxwell that electromagnetic waves must exist and that their speed was identical to that of light ended the debate: light was an electromagnetic wave.
Lawrence M. Krauss
No slave system has ever been able to continue to function on the slaves provided by its own biological reproduction because the rate of human reproduction is too slow and the expense from infant mortality and years of unproductive upkeep of the young make this prohibitively expensive. This relationship is one of the basic causes of the American Civil War, and was even more significant in destroying ancient Rome.
Carroll Quigley
I conceived, developed and applied in many areas a new geometry of nature, which finds order in chaotic shapes and processes. It grew without a name until 1975, when I coined a new word to denote it, fractal geometry, from the Latin word for irregular and broken up, fractus. Today you might say that, until fractal geometry became organized, my life had followed a fractal orbit.
Benoît Mandelbrot
