This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ...earth. r' = radius of moon, or other body. P = moon's horizontal parallax = earth's angular semidiameter as seen from the moon. f = moon's angular semidiameter. Now = P (in circular measure), r'-r = r (in circular measure);.'. r: r':: P: P', or (radius of earth): (radios of moon):: (moon's parallax): (moon's semidiameter). Examples. 1. Taking the moon's horizontal parallax as 57', and its angular diameter as 32', find its radius in miles, assuming the earth's radius to be 4000 miles. Here moon's semidiameter = 16';.-. 4000::: 57': 16';.-. r = 400 16 = 1123 miles. 2. The sun's horizontal parallax being 8"8, and his angular diameter 32V find his diameter in miles. ' Am. 872,727 miles. 3. The synodic period of Venus being 584 days, find the angle gained in each minute of time on the earth round the sun as centre. Am. l"-54 per minute. 4. Find the angular velocity with which Venus crosses the sun's disc, assuming the distances of Venus and the earth from the sun are as 7 to 10, as given by Bode's Law. Since (fig. 50) S V: VA:: 7: 3. But Srhas a relative angular velocity round the sun of l"-54 per minute (see Example 3); therefore, the relative angular velocity of A V round A is greater than this in the ratio of 7: 3, which gives an approximate result of 3"-6 per minute, the true rate being about 4" per minute. Annual ParaUax. 95. We have already seen that no displacement of the observer due to a change of position on the earth's surface could apparently affect the direction of a fixed star. However, as the earth in its annual motion describes an orbit of about 92 million miles radius round the sun, the different positions in space from which an observer views the fixed stars from time to time throughout the year must be separated ...

NATIONAL BEST SELLER A stunning, personal memoir from the astronaut and modern-day hero who spent a record-breaking year aboard the International Space Station—a message of hope for the future that will inspire for generations to come. The veteran of four spaceflights and the American record holder for consecutive days spent in space, Scott Kelly has experienced things very few have. Now, he takes us inside a sphere utterly hostile to human life. He describes navigating the extreme challenge of long-term spaceflight, both life-threatening and mundane: the devastating effects on the body; the isolation from everyone he loves and the comforts of Earth; the catastrophic risks of colliding with space junk; and the still more haunting threat of being unable to help should tragedy strike at home--an agonizing situation Kelly faced when, on a previous mission, his twin brother's wife, American Congresswoman Gabrielle Giffords, was shot while he still had two months in space. Kelly's humanity, compassion, humor, and determination resonate throughout, as he recalls his rough-and-tumble New Jersey childhood and the youthful inspiration that sparked his astounding career, and as he makes clear his belief that Mars will be the next, ultimately challenging, step in spaceflight. In Endurance, we see the triumph of the human imagination, the strength of the human will, and the infinite wonder of the galaxy.

Experience “one of the best adventure books ever written” (Wall Street Journal) in this New York Times bestseller: the harrowing tale of British explorer Ernest Shackleton's 1914 attempt to reach the South Pole. In August 1914, polar explorer Ernest Shackleton boarded the Endurance and set sail for Antarctica, where he planned to cross the last uncharted continent on foot. In January 1915, after battling its way through a thousand miles of pack ice and only a day's sail short of its destination, the Endurance became locked in an island of ice. Thus began the legendary ordeal of Shackleton and his crew of twenty-seven men. When their ship was finally crushed between two ice floes, they attempted a near-impossible journey over 850 miles of the South Atlantic's heaviest seas to the closest outpost of civilization. In Endurance, the definitive account of Ernest Shackleton's fateful trip, Alfred Lansing brilliantly narrates the harrowing and miraculous voyage that has defined heroism for the modern age.

National Geographic Adventurer of the Year Jennifer Pharr Davis unlocks the secret to maximizing perseverance--on and off the trail Jennifer Pharr Davis, a record holder of the FKT (fastest known time) on the Appalachian Trail, reveals the secrets and habits behind endurance as she chronicles her incredible accomplishments in the world of endurance hiking, backpacking, and trail running. With a storyteller's ear for fascinating detail and description, Davis takes readers along as she trains and sets her record, analyzing and trail-testing the theories and methodologies espoused by her star-studded roster of mentors. She distills complex rituals and histories into easy-to-understand tips and action items that will help you take perseverance to the next level. The Pursuit of Endurance empowers readers to unlock phenomenal endurance and leverage newfound grit to achieve personal bests in everything from sports and family to the boardroom.

An awe-inspiring memoir from NASA astronaut Scott Kelly who spent a record-breaking year in space, now newly adapted for young readers. Prepare to blast off with astronaut Scott Kelly as he takes readers on a journey through his year aboard the International Space Station and his life prior to becoming a true American hero. Discover the extreme challenges of long-term spaceflight, the pressures of living in close quarters with people from many countries, the extremely dangerous risk of colliding with space junk and the unnerving feeling of not being able to help if tragedy strikes at home. Find out the story of Kelly's childhood, his struggles in school, and ultimately the inspiration that sparked his incredible career, and the training to become a test-pilot and then astronaut. This personal and fascinating story will encourage aspiring astronauts and young readers everywhere to believe in the impossible and reach for the stars.

Power, Speed, ENDURANCE is a highly effective training system that has catapulted thousands of endurance athletes to the next level. Developed by CrossFit Endurance founder Brian MacKenzie and featuring instruction from some of the world's top endurance and CrossFit coaches, Power, Speed, ENDURANCE unveils techniques, drills, and training strategies that will optimize your performance and overall work capacity while decreasing your susceptibility to injury.Through thousands of step-by-step color photographs and detailed narrative, Power, Speed, ENDURANCE breaks down proper running, cycling, and swimming mechanics like never before. MacKenzie's unique system of building strength, speed, and power is aimed at reaping continual results, without injury. In fact, he devotes an entire chapter to the "broken down" athlete, equipping you with the knowledge to prevent, repair, and treat injuries brought on by poor mechanics and tight overworked muscles. In addition, MacKenzie outlines a straightforward approach to nutrition, hydration, and electrolyte balance that will increase your energy, boost your performance, and accelerate your recovery.Whether you're a self-trained athlete looking to compete in your first endurance event, a seasoned competitor looking to reach your highest potential, or a CrossFit athlete looking to increase stamina, Power, Speed, ENDURANCE will help you reach your goal.In this book, you will learn how to: develop proper running technique using the Pose Method properly fit yourself on a bike improve cycling mechanics on a road, time-trial, and mountain bike swim effortlessly and improve freestyle-stroke mechanics through skill-based drills and exercises accelerate work capacity and minimize fatigue by building muscle, speed, and power incorporate a CrossFit Endurance strength-and-conditioning program into your training routine maximize nutrition, hydration, and electrolyte balance to improve performance and body composition prevent, repair, and treat nagging injuries associated with endurance sports and improve range of motion using Starrett's Movement and Mobility Method