This 2004 work reviews results from the current generation of X-ray telescopes.In the past few years, the launch of Chandra and XMM-Newton has revolutionised research in X-ray astronomy. The high quality X-ray observations now being made have had a major impact on topics ranging from protostars to cosmology. The contributions in this work, by leading authorities in the field, originate from a Royal Society Discussion Meeting which was held to review the most recent results from the current generation of X-ray telescopes, and set them in context. The books is a valuable reference for research astronomers and graduate students.In the past few years, the launch of Chandra and XMM-Newton has revolutionised research in X-ray astronomy. The high quality X-ray observations now being made have had a major impact on topics ranging from protostars to cosmology. The contributions in this work, by leading authorities in the field, originate from a Royal Society Discussion Meeting which was held to review the most recent results from the current generation of X-ray telescopes, and set them in context. The books is a valuable reference for research astronomers and graduate students.These contributions by recognized authorities originate from a Royal Society discussion meeting held to review the most recent results obtained from the current generation of X-ray telescope research. The launch of Chandra and XMM-Newton has revolutionized research in X-ray astronomy over the past few years, and high quality X-ray observations now being made have had a major impact on topics ranging from protostars to cosmology. This book is a valuable reference for research astronomers and graduate students.Preface; 1. Forty years on from Aerobee 150: a personal perspective K. Pounds; 2. X-ray spectroscopy of astrophysical plasmas S. M. Kahn, E. Behar, A. Kinkhabwala and D. W. Savin; 3. X-rays from stars M. Gudel; 4. X-ray observations of accreting white-dwarf systems M. Cropper, G. Ramsay, C. Helllƒ.