Grab 'n' Go Astronomy (The Patrick Moore Practical Astronomy Series)
Language: English
Pages: 245
ISBN: 1493908251
Format: PDF / Kindle (mobi) / ePub
Written for amateur astronomers, this book reviews portable equipment, accessories and mounts, describing which are best for different kinds of viewing. Shows how to use your grab 'n' go telescope to observe a wealth of solar, lunar and planetary objects.
Strange New Worlds: The Search for Alien Planets and Life Beyond Our Solar System
................................................................................ 191 14 Variable Stars, Comets and Meteors ..................................................... 199 15 Summer Celebrations ............................................................................. 211 16 Glories of the Fall .................................................................................... 225 Glossary.
Globular cluster M13 and be rewarded with a bright, highly condensed image. With a concentrated gaze, the attentive observer can make out quite a few individual stars on its periphery. The telescope does not disappoint on open clusters like M52 either, its modest aperture revealing several dozen stars in a kidney-shaped arrangement, the eye being drawn to a striking eighth magnitude orange sun on its flank. The lack of field curvature of this ‘slow’ object glass makes examining these bright.
Axis will be focused at the same point. The substrate out of which the primary mirror is fabricated tends to be Pyrex or plate glass, and since it only needs to be figured and aluminized on one surface, it makes their manufacture significantly easier than the refractors described in the previous chapters. Not surprisingly, there exist a nice variety of commercial Newtonians in apertures ranging from 3 in. (76 mm) up to 6 in. (152 mm) that can rightly be considered grab ‘n’ go ‘scopes. The.
Move along the horizontal branch to higher temperatures, some becoming unstable pulsating stars in the yellow instability strip (RR Lyrae variables), whereas some become even hotter and can form a blue tail or blue hook Investigating Stellar Old Age and Death 123 to the horizontal branch. The exact morphology of the horizontal branch depends on parameters such as the star’s chemical composition (what astronomers refer to as its metallicity), age, and helium content, but the exact details are.
The great 36-in. Lick refractor. With hindsight and with the evidence from a flotilla of spacefaring robotic emissaries from the Planet Earth, any respectably sized moon of Venus would have detected by now. Ghost imaging in uncoated telescope lenses and or other optical culprits are the likely explanation for the false positive reports. 194 13 The Inferior Planets Venus’s Mysterious Atmosphere Earth-sized Venus has a massive, corrosive atmosphere made almost entirely of carbon dioxide, which.