Canon Selphy QX20 review: see the smaller picture
Canon is no stranger to the science of photo printing and makes some of the best portable printers, some of the best ...
One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate.’
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...