Astronomy Physics

Einstein's special theory of relativity made time travel to the future a possibility, and later his general theory of relativity showed us that loops in spacetime could exist, meaning that we might be able to bend time backwards, too. But what are the practicalities of making time travel possible? What do we still need to know? How do we deal with any paradoxical twists in time - and could quantum physics hold the answer?

Did you know that the sun is a star? Without the sun’s light and heat, there would be no live on Earth. Kids will learn why the sun is so important to us in this musical audiobook perfect for young scientists.

Neil deGrasse Tyson, a former star, amateur wrestler at Harvard who went on to become an award-winning astrophysicist, might be the most well-known science communicator in the United States since the late Carl Sagan. Tyson, who has served as the director of the Hayden Planetarium in New York City since 1996, had published a dozen books prior to Astrophysics for People in a Hurry; all of them have been aimed at a popular audience. In spite of that, Astrophysics for People in a Hurry is probably his most accessible and scaled-down work to date.

Of all the things we know about the universe, what do we really know about the nature of space? For example, is there a beyond space? Can space exist in the absence of matter? Though it may seem like a dumb question - 'where' does space come from? This essay takes a look at what some scientists have to say on this issue; the work also contains many references on the topic of spacetime and relativity, which should be useful to physics students.

A collection of chapters from the previous five volumes in the Rational Science series. We discuss the difference between objects and concepts, hypothesis and theory, and science and technology. We learn about light, time, and mass, the Big Bang Theory, black holes, and Mach’s principle. We find out about dinosaurs and why they were so big. We look at a couple hypotheses on planetary and solar system formation. From atom to sun, we learn to think about reality in new ways.