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Binoculars - Sheldon & Hammond (TREND)
$99.95
BARSKA offers a large variety of binoculars using the latest advances in technology in sports optics. Our binoculars can be used outdoors to view wildlife, stars, or even aquatic species as we have models specially designed for terrestrial, celestial, and aquatic viewings. Using the best technology, our lenses create clear, crisp, and distinct images to enhance the user's experience. The Trend binoculars come with strap and case.
- 8x magnification
- 21mm objective lens
- field of view: 128m@1000m
- close focus: 5m
- prism glass: BK-7
- exit pupil: 2.6mm
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An Astronaut's Guide to Life on Earth
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An 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.
Cosmic Challenge
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Listing more than 500 sky targets, both near and far, in 187 challenges, this observing guide will test novice astronomers and advanced veterans alike. Its unique mix of Solar System and deep-sky targets will have observers hunting for the Apollo lunar landing sites, searching for satellites orbiting the outermost planets, and exploring hundreds of star clusters, nebulae, distant galaxies, and quasars. Each target object is accompanied by a rating indicating how difficult the object is to find, an in-depth visual description, an illustration showing how the object realistically looks, and a detailed finder chart to help you find each challenge quickly and effectively. The guide introduces objects often overlooked in other observing guides and features targets visible in a variety of conditions, from the inner city to the dark countryside. Challenges are provided for the naked eye, through binoculars and the largest backyard telescopes.
Cosmic Messengers - The Limits of Astronomy in an Unruly Universe
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Martin Harwit, author of the influential book Cosmic Discovery, asks key questions about the scope of observational astronomy. Humans have long sought to understand the world we inhabit. Recent realization of how our unruly Universe distorts information before it ever reaches us reveals distinct limits on hoe well we will inevitably be thwarted by ever-more complex distortions and will never untangle the data completely. Observational astronomy, and the cost of pursuing it, will then have reached an inherent end. Only some totally different lines of approach, as yet unknown and potentially far more costly, might then need to emerge if we wish to learn more. This accessible book is written for all astronomers, astrophysicists, and those curious about how well we will ever understand the Universe and the potential costs of pushing those limits.Information
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