By Eric Schulman
For a scientist at the least, this is often rather a humorous ebook. either an homage and a parody of Hawking and the high-brow suggestion technology books for non-scientists. I laughed out loud.
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Extra info for A Briefer History of Time: From the Big Bang to the Big Mac
The stars here are mostly hydrogen and helium so it is not expected that many planets will form, making it unlikely for life to arise around these stars. As the pregalactic cloud began to collapse in earnest, the cloud's slight rotation became faster and faster and the stars and gas formed a disk. “This thin layer of stars and gas looks like a phonograph record and is rotating around the center of the galaxy at a speed of about half a million miles per hour,” says another expert. It is expected that the intense star formation in this region of the new galaxy will result in large amounts of the elements needed to form planets and life.
C. ” “We're so glad we chose a GALSA star buyer's agent to find the right star for us. My husband and I wanted a star with a big enough habitable zone that we could have life on at least one planet, but we didn't have a lot of resources to spend. 9 solar mass range, I knew that the surface temperature of these stars would be on the low side for their purposes. The stars would be emitting only 30 to 60 percent of the energy that a one solar mass star emits. ” “The GALSA buyer’s agent didn't put any pressure on us to increase our desired stellar mass range, even after we didn't find anything we liked.
All three were busy fusing hydrogen to helium, but because their masses were not the same, they each went about it in a different way. The little star shone only as brightly as it thought wise, and used up its hydrogen fuel very slowly. Even though it had ten times less hydrogen than the medium star, it knew that its hydrogen would last 300 times longer (3 trillion years, in fact). The medium star used up its hydrogen in 10 billion years and then started fusing helium to carbon and oxygen. But the helium only lasted a billion years, after which the medium star decided to be content with being a slowly cooling white dwarf.