When I was a kid, I had a serious interest in astronomy. I owned one of those pocket guides to the solar system and read and reread the entries on the Sun and the planets. While it was fun to think about the latter, especially the possibilities of extraterrestrial life (I was also reading Galaxy, If, and other sci-fi magazines), the Sun was mainly the object of a slightly nervous awe. In the age of the Cold War and the hydrogen bomb, the power of the Sun was almost too overwhelming to contemplate. A lot of it was the sheer size and heat – and what sentient creature doesn’t fear a colossal fire?
The Sun, the Earth, and Near-Earth Space, one of Library Journal’s 2009 Notable Government Documents, provides, among other things, hypothetical voyage to, and even into, the Sun. Subtitled “A Guide to the Sun-Earth System”, this handsome, profusely illustrated book from NASA is accessible and well-written enough for a layperson like me to understand; it’s the facts that are overwhelming. I hate to admit it, but despite my youthful interests, I didn’t remember, or didn’t know, that sunspots are huge magnetic fields generated by the Sun’s incredibly turbulent nuclear furnace, their darkness representing their cooler (7,000 C. versus the 10,000 C. of the solar surface) temperatures. I knew that the peak of the 11-year sunspot cycle was prone to cause magnetic disturbances that affected radio electro-magnetic fields on earth, but didn’t realize that the spots themselves were magnetic fields. I also didn’t know that the widespread 1989 electrical blackouts that affected Quebec and parts of the United States were due to the solar flare, coronal mass ejection (CME) and geomagnetic storm of March 13 of that year.
The Sun, the Earth, and Near-Earth Space is packed with historical and scientific information about the Sun and its relationship with our planet – which means with all of us – that I found totally engrossing. The verdict: an excellent read for a non-scientist interested in astronomical phenomena, a fine textbook for a college-level course, and a reminder of how much we depend on this much-worshipped but little-understood source of all energy and life.