Neutron stars, whether isolated or in a binary system, display a varied and complex phenomenology, often accompanied by extreme variability of many time scales, which takes the form of pulsations due to the object rotation, quasi-periodicities associated to accretion of matter, and explosions due to matter accreted on the surface or to starquakes of highly magnetized objects. This book gives an overview of the current observational and theoretical standpoint in the research on the physics under the extreme conditions that neutron stars naturally provide. The six chapters explore three physical regions of a neutron star: the space around it, where accretion and pulsar companions allow testing of general relativity its surface, where millisecond pulsation and X-ray burts provide clues about general relativistic effects and the equation of state of neutron matter its interior, of course, inaccessible to direct observations, can nevertheless, be probed with all observational parameters related to neutron star variability.

This is a popular science book surrounding astronauts’ life on the space station. The book not only highlights the weightlessness experience of astronauts and the extraordinary phenomena they witness, but also illustrates the physics behind these events, which opens a new window for readers to explore the outer space. This book is especially fun for those who are curious about the life details of astronauts on the space station. The book is based on real events, and features images and cartoons that vividly depict unusual scenes between the outer space and the earth. Physical principles become easier to understand with these visual aids. During the reading, readers can immerse themselves in the enjoyable adventure of space travel and the strange feeling of weightlessness while having their doubts of every oddity solved. The book elaborates on the interesting contrast between the space and the earth, and provides readers with a stunning new perspective with easily comprehensible language and examples.