How Old Is the Universe?
Astronomers are at an enormous disadvantage, compared with other scientists. A biologist can bring a collection of fruit flies into his laboratory, encourage a particular behavior among those flies, and apply all the tools of his trade to studying that behavior. A chemist can mix chemicals together, heat them up or cool them down, and study how they react in the controlled environment of her laboratory. A geologist can hike up a mountain, collect rocks from a particular outcrop, and return these samples to his laboratory for analysis. A physicist can power up a laser and test the mechanical properties of a newly-created polymer and can do this on her vibration-isolated, experimental table.
Astronomers? They cannot drag the stars into their laboratories. They cannot make stars hotter or cooler to see how they behave when their temperatures change. They cannot slice open galaxies in order to peer into their cores. Astronomers can only take what the universe offers— light and a few small rocks—and make the most of it.
جهت استعلام قيمت و سفارش چاپ اين محصول لطفا با انتشارات گنج حضور تماس حاصل فرماييد