Who hasn't dreamed of going to the moon? That dream for eleven-year-old Leo Gray is about to come true—but he’s in for the surprise of his life! In the year 2113, most people live in robotically maintained homes, ride around in self-flying cars, and wear ozone-resistant clothes. Most people that is; just not Leo Gray’s parents. They’re stuck in the past, and science know-it-all Leo is completely fed up with his beyond-embarrassing living arrangement with them. But when he enters a rocket-building competition for a chance to attend the Lunar Academy, Leo’s luck finally seems to turn in his favor! However, it's not long after stepping foot into his dorm room that Leo discovers the moon’s celebrated city is harboring a world of dark secrets. It's soon a race against the clock for Leo and his friends Andromeda Groves (a code-hacking whiz from Canada), Pavo Digbi (a history buff from Brazil), and Grus Pinwheel (a musically gifted and comically endearing Aussie) to intercept and foil plans to destroy the city—leaving the group’s leader faced with a decision that no eleven-year-old should ever have to make: save Earth or save himself and the city he fought so hard to reach. ​Leo Gray and the Lunar Eclipse is an epic adventure set in a wonderfully imaginative, futuristic world overflowing with robots, anti-gravity sports, superhero-esque suspense, and page after page of laughter and heart that will leave boys and girls equally gripped under its spell!

The most complete guide to viewing eclipses-including details on every solar and lunar eclipse through 2017 Want to observe the most fleeting eclipse phenomena, take dramatic photos, and keep a detailed record of the experience? Now you can be prepared. This comprehensive one-stop resource covers everything you need to know about solar and lunar eclipses-why they happen, how to view them, how to photograph them, even when and where they will occur through the year 2017. Here's where to turn for: * Detailed explanations of eclipse mechanics and dynamics, viewing techniques, and what to look for, both in the sky and all around you * Extended discussions of eclipse photography and videography-film selection and developing, filter requirements, special care of equipment, and more * Intriguing individual and group activities you can carry out during an eclipse to heighten your enjoyment and deepen your understanding of the event * Detailed maps and discussions on how and where to best view each eclipse, plus travel considerations, likely weather conditions, and equipment recommendations Whether you're a backyard astronomer, a dedicated eclipse chaser, or a teacher guiding students through their first eclipse experience, Eclipse! provides the in-depth, detailed, practical information you need to make the most of these thrilling celestial marvels of nature.

The Correspondence of John Flamsteed discusses this leading figure in the final phases of the seventeenth-century scientific revolution, presents his extensive correspondence with 129 British and foreign scholars all over the world, and touches on many of the scientific discussions of the day. This book, the last volume of the set, contains his letters from number 901 to 1515.

Mercury gives informed perspectives on salient issues in research, education, history, and public policy relating to astronomy.