اسم: | Astronomy - February 2020 (gnv64) |
الوصف: Astronomy - February 2020 English | 80 pages | True PDF | 61.6 mb FEATURES 9 QUANTUM GRAVITY - Everything you need to know about the universe this month: supermassive black holes, powerful magnetic fields, forming stars that resemble a pretzel, and more. 18 Our first interstellar visitor - 'Oumuamua zipped through the inner solar system in 2017, revealing just how little we know about planetary systems beyond our own. ALISON KLESMAN 28 Cataclysm in the early solar system - Apollo astronauts gathered rocks that hinted that large objects pummeled the inner planets some 4 billion years ago. Now, scientists aren't SO sure. NOLA TAYLOR REDD 36 Sky This Month - Mercury at its evening peak. MARTIN RATCLIFFE AND ALISTER LING 38 Star Dome and Paths of the Planets RICHARD TALCOTT; ILLUSTRATIONS BY ROEN KELLY 44 Lowell Observatory turns 125 - More than a century after opening its doors, "Americas Observatory" remains a hotbed for scientific discovery and public outreach. JEFFREY HALL AND KEVIN SCHINDLER 50 See Venus at its best - The planet named for the goddess of beauty is a stunning sight through any telescope, especially this spring. MICHAEL BAKICH 52 Astronomy's electronic revolution - As ground-based telescopes approached their size limit in the early 20th century, new technologies focused on improving light detectors. SAMANTHA THOMPSON 56 Observe winter's twin treats - You'll get twice the bang for your buck when you point your scope at these celestial pairings. STEPHEN JAMES O'MEARA 60 Celestron's Nature Binoculars - High-quality glass, light weight, and lots of features make the DX ED 10x50 worthy of your consideration. PHIL HARRINGTON 68 Ask Astro - Elements in the Sun. COLUMNS Strange Universe BOB BERMAN 16 For Your Consideration JEFF HESTER 62 Observing Basics GLENN CHAPLE 64 Secret Sky STEPHEN JAMES O'MEARA 66 IN EVERY ISSUE From the Editor 6 Astro Letters 8 Advertiser Index 65 New Products 67 Reader Gallery 70 Breakthrough 74 | |
يوتيوب فيديو: | |
الفئة: | Books |
اللغة: | English |
إجمالي حجم: | 61.84 MB |
تجزئة المعلومات: | 663C68B58281D0A179905BB00F9836FDBDE2776B |
وأضاف بها: | gnv64 |
تاريخ الإضافة: | 2019-12-31 15:22:48 |
سيل مركز: | Torrent Verified |
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