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Astronomy - February 2020 (gnv64)

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name:Astronomy - February 2020 (gnv64)
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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
YouTube 视频:
类别:Books
语言:English  English
总大小:61.84 MB
哈希信息:663C68B58281D0A179905BB00F9836FDBDE2776B
增加:gnv64 VIPBook Worm
加入的日期:2019-12-31 15:22:48
洪流地位:Torrent Verified


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