Page 4 - Astronomy - October 2017 USA

Online Content Code: ASY1710
Enter this code at: www.astronomy.com/code OCTOBER 2017
to gain access to web-exclusive content VOL. 45, NO. 10

NASA/JPL/USGS

CONTENTS 20 ON THE COVER
Forty years ago, Voyagers 1 and 2
made their “Grand Tour” of the
solar system, changing our view
of the universe forever.
FEATURES

20 COVER STORY 38 56 COLUMNS
Unveiling a giant StarDome and How an interplanetary
A storm-wracked world and Path of the Planets mission changed the Strange Universe 10
BOB BERMAN
moons with erupting volcanoes RICHARD TALCOTT; world
and underground oceans were ILLUSTRATIONS BY ROEN KELLY Voyager 1 and 2 revealed much For Your Consideration 16
just some of the surprises the about the cosmos — and left a JEFF HESTER
Voyager spacecraft revealed. 44 giant mark on pop culture. Observing Basics 18
FRANCIS REDDY Ask Astro SHANNON STIRONE GLENN CHAPLE
The hidden Earth.
28 58 Secret Sky 66
Close encounters with 46 Talk astronomy with your STEPHEN JAMES O’MEARA
the ringed planet The unsolved mysteries un-cosmic friends Binocular Universe 68
The probes not only returned of the ice giants Here’s a concise guide to PHIL HARRINGTON
stunning images of Saturn and avoid going over the heads of
Geysers on Triton, furious storms
its rings — they also set the stage your science-avoiding peeps.
on Neptune, and a seemingly se- QUANTUM GRAVITY
for the highly successful Cassini MICHAEL E. BAKICH
rene Uranus that turned out to be
mission. LIZ KRUESI Snapshot 8
a cosmic oddity. KOREY HAYNES
62 Astro News 12
34 50 Memories from a
Voyager revealed! The Grand Tour backyard observer
Incredibly, a few instruments IN EVERY ISSUE
The twin spacecraft took long Decades-old observing jour-
aboard both spacecraft continue From the Editor 6
journeys to explore the outer nals recall a time when Voyager
to function. JOHN WENZ utterly transformed what we
solar system. RICHARD TALCOTT Astro Letters 11
know about the outer planets.
36 52 RAYMOND SHUBINSKI New Products 69
Sky This Month Reader Gallery 70
Image the giant planets
Uranus glows brightly.
With the right camera and Advertiser Index 73
MARTIN RATCLIFFE AND
telescope, you can take the same Breakthrough 74
ALISTER LING “Grand Tour” the Voyagers did.
DAMIAN PEACH
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4 ASTRONOMY • OCTOBER 2017