A new NASA space observatory is scheduled to launch into orbit this week on a lofty mission to map more than 450 million galaxies.The SPHEREx mission (short for Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) will map the entire sky four times over two years, offering scientists a chance to study how galaxies form and evolve, and providing a window into how the universe came to be.NASA’s SPHEREx observatory undergoes testing at BAE Systems in Boulder,...