Astronomy - USA (2020-04)

CONTENTS 18

4 ASTRONOMY • APRIL 2020

18
Jim Lovell remembers:
Triumph over tragedy
The famous astronaut recounts
Apollo 13 — the mission that
almost didn’t make it home.
RICHARD TALCOTT

28
Apollo 13 in 3D
A near-tragedy in space
challenged the crew of
Apollo 13. They missed
walking on the Moon, but
in the end, triumphed.
DAVID J. EICHER AND BRIAN MAY

36
Sky This Month
Venus slips past two star
clusters. MARTIN RATCLIFFE
AND ALISTER LING

38

Star Dome and

Paths of the Planets

RICHARD TALCOTT;

ILLUSTRATIONS BY ROEN KELLY

44

Ann Druyan on Cosmos

and Carl Sagan’s legacy

Astronomy’s editor interviews

the executive producer of

Cosmos and late, great Carl

Sagan’s widow. DAVID J. EICHER

50

Visit the nearest 14

habitable exoplanets

From a planet circling Proxima

Centauri to several around

TRAPPIST-1, life-friendly

worlds might be closer than

you think. JOHN WENZ

52

Explore the heart

of Virgo

Spring is galaxy season,

and no constellation proves

it better than this one.

MICHAEL E. BAKICH

58

The sky’s best

elliptical galaxies

Discover a world of massive

star cities lurking in the

skies of fall and spring.

MICHAEL E. BAKICH

70

Ask Astro

Expanding space.

IN EVERY ISSUE

From the Editor 6

Astro Letters 8

Advertiser Index 65

New Products 68

Reader Gallery 72

Breakthrough 74

FEATURES

APRIL 2020

VOL. 48, NO. 4

Astronomy (ISSN 0091-6358, USPS 531-350)

is published monthly by Kalmbach Media

Co., 21027 Crossroads Circle, P. O. Box 1612,

Waukesha, WI 53187–1612. Periodicals postage

paid at Waukesha, WI, and additional offices.

POSTMASTER: Send address changes to

Astronomy, PO Box 8520, Big Sandy, TX 75755.

Canada Publication Mail Agreement #40010760.

Go to http://www.Astronomy.com

for info on the biggest news and

observing events, stunning photos,

informative videos, and more.

ONLINE

FAVORITES

9

QUANTUM GRAVITY

Everything you need to

know about the universe

this month: the first map

of a neutron star, galaxies

missing dark matter, and

Parker Solar Probe news.

COLUMNS

Strange Universe 16

BOB BERMAN

Secret Sky 62

STEPHEN JAMES O’MEARA

Observing Basics 64

GLENN CHAPLE

Binocular Universe 66

PHIL HARRINGTON

ON THE COVER

Midway to the Moon, an oxygen

tank explosion crippled Apollo 13,

which, thankfully, was able to make

the return trip to Earth safely.

Dave’s

Universe

The inside

scoop from

the editor.

News

The latest

updates from

the science

and the hobby.

Picture of

the Day

Gorgeous

photos from

our readers.

Trips and

Tours

Travel the world

with the staff of

Astronomy.

AS

TRO

NO

MY

:^ RO

EN

KE

LLY

;^ M

OO

N:^

NA

SA

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