Astrophysics for People in a Hurry
Neil deGrasse TysonSözler ve Alıntılar
Universe is not obliged to be logical for you
-"Bir çocuğun hayatının ilk yılını ona konuşmayı ve yürümeyi öğreterek, geri kalanını ise susmayı ve oturmayı öğreterek keçiriyoruz. Bunda bir yanlışlık var."
Spheres are indeed fertile theoretical tools that help us gain insight into all manner of astrophysical problems. But one should not be a sphere-zealot. I am reminded of the half-serious joke about how to increase milk production on a farm: An expert in animal husbandry might say, “Consider the role of the cow’s diet . . .” An engineer might say, “Consider the design of the milking machines . . .” But it’s the astrophysicist who says, “Consider a spherical cow . . .”
Computer studies of meteor strikes demonstrate conclusively that surface rocks near impact zones can get thrust upward with enough speed to escape the body’s gravitational tether. At the rate we are discovering meteorites on Earth whose origin is Mars, we conclude that about a thousand tons of Martian rocks rain down on Earth each year. Perhaps the same amount reaches Earth from the Moon. In retrospect, we didn’t have to go to the Moon to retrieve Moon rocks.
Kozmik bakış açısı Dünya'nın bir zerre olduğunu gösteriyor. Ancak bu değerli bir zerre ve şu an için sahip olduğumuz tek yuva.
-The cosmic perspective shows Earth to be a mote. But it’s a precious mote and, for the moment, it’s the only home we have.
Filling out the entire electromagnetic spectrum, in order of low-energy and low-frequency to high-energy and high-frequency, we have: radio waves, microwaves, infrared, ROYGBIV, ultraviolet, X-rays, and gamma rays.
With each passing moment the universe got a little bit bigger, a little bit cooler, and a little bit dimmer.
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Geçen her dakikayla beraber evren biraz daha büyüdü, biraz daha soğudu biraz daha sönükleşti