English Great Debate (astronomy) Cited by user Drbogdan on 28 Mar 2017 In astronomy, the Great Debate, also called the Shapley–Curtis Debate, was an influential debate, held on 26 April 1920 at the Smithsonian Museum of Natural History…
English 2016 in science Cited by user Drbogdan on 17 Oct 2016 A number of significant scientific events have either occurred or are scheduled to occur in 2016.
English Observable universe Cited by user Drbogdan on 17 Oct 2016 The observable universe consists of at least two trillion galaxies, and other matter that can, in principle, be observed from Earth at the present time because light and…
English Galaxy Cited by user Earthandmoon on 14 Oct 2016 A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.