Reader (1000+) Galactic Lenses Confirm Universe's Age, Size. The size and age of the universe, as well as how fast it is expanding, has been confirmed with a new, precise method that uses galaxies as lenses to look at other galaxies. The new measurement confirmed the age of the universe as 13.75 billion years old, to within 170 million years, and also confirmed the strength of dark energy, which is responsible for the accelerating expansion of the universe. When looking out at the cosmos, it can be difficult for scientists to distinguish between a very bright light far away and a dimmer source much closer to Earth.
Submit an article The Astrophysical Journal Letters is a peer-reviewed express scientific journal that allows astrophysicists to rapidly publish short notices of significant original research. The Astrophysical Journal Supplement publishes significant papers containing extensive data or calculations, or of very specialized interest. Latest articles 2012 Impact Factor Journal links View by subject.
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You need to install a newsreader on your computer. 25 Greatest Science Books of All Time. Read an essay on the greatest science books by Nobel laureate Kary B.
Mullis. 1. and 2. The Voyage of the Beagle (1845) and The Origin of Species (1859) by Charles Darwin [tie] One of the most delightful, witty, and beautifully written of all natural histories, The Voyage of the Beagle recounts the young Darwin's 1831 to 1836 trip to South America, the Galápagos Islands, Australia, and back again to England, a journey that transformed his understanding of biology and fed the development of his ideas about evolution.
Fossils spring to life on the page as Darwin describes his adventures, which include encounters with "savages" in Tierra del Fuego, an accidental meal of a rare bird in Patagonia (which was then named in Darwin's honor), and wobbly attempts to ride Galápagos tortoises. Yet Darwin's masterwork is, undeniably, The Origin of Species, in which he introduced his theory of evolution by natural selection.