When the movie Interstellar was released in 2014, I thought its depiction of a black hole was one of the most hauntingly beautiful scenes. And with input from prominent astrophysicist Kip Thorne, there was plenty of science to this piece of science fiction (see The Science of Interstellar). Amazingly, we only had to wait five more years for an actual image of a black hole – or really its event horizon – to be published. But these astounding images have been a long time coming. With Gravity’s Century, science writer Ron Cowen traces the story back to Albert Einstein and provides an accessible and compact overview of the century-long quest in physics to better understand gravity.
Humans have been gazing at the stars since times immemorial. Once we understood what stars were, and that our planet together with others circled one such star, it was only a small step to think that there must be other planets outside of our Solar System. But only in the last 25 years have we been able to start finding these so-called exoplanets. Astronomer Donald Goldsmith here promises, and delivers, an introduction that even an astronomy novice such as myself could understand and thoroughly enjoy.