Böcker av Charles Liu

From planetary movements and the exploration of our solar system to black holes and dark matter, this comprehensive reference simplifies all aspects of astronomy with an approachable question-and-answer format. With chapters broken into various astronomical studiesincluding the universe, galaxies, planets, and space explorationthis fully updated resource is an ideal companion for students, teachers, and amateur astronomers, answering more than 1,00 questions, such as Is the universe infinite? What would happen to you if you fell onto a black hole? What are the basic concepts of Einstein's special theory of relativity? and Who was the first person in space?

The Cosmos Explained pinpoints where you are in space and time, charting the life of our universe from the Big Bang to the future of our galaxy and beyond.

Get outdoors with this guide to 60 of the best hikes within an hour or so from Phoenix, leading you to scenic overlooks, wildlife hot spots, ancient ruins, and petroglyphs.

How to test microfiltration and ultrafiltration membranes in water treatment for tiny defects that can allow pathogens through.