This thoroughly updated third edition covers new discoveries made in the past decade, including the discovery of gravitational waves from merging black holes and neutron stars, the first close-up images of the region hear a black hole event horizon, and observations of debris from stars torn apart when they ventured too close to a supermassive back hole.
Avoiding math, the authors blend theoretical arguments with observational results to demonstrate how both have contributed to the subject. Clear, explanatory illustrations and photographs reveal the strange and amazing workings of our Universe. The engaging style makes this book suitable for introductory undergraduate courses, amateur astronomers and all readers interested in astronomy and physics.
This thermometer allows you to see the temperature by watching the balls sink and float in a beautiful sealed glass cylinder, as their densities are such that they rise or fall as the temperature changes. You can hang this one up as a beautiful display piece.
Measures between 16°C and 32°C
$29.95An Astronaut's Guide to Life on Earth is an inspirational memoir of space exploration and hard-won wisdom, from an astronaut who has spent a lifetime making the impossible a reality.