SPACE CLOUDS: TAKE A 3D LOOK INSIDE NEBULAE p. 44
V
ol
.(^48)
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su
e
5
MAY 2020
The world’s best-selling astronomy magazine
Why the Big Bang
is still stumping
astronomers p. 20
How V.M. Slipher
discovered
the expanding
universe p. 30
EXPLORE
EDGE-ON
AND FACE-ON
GALAXIES p. 56
BOB BERMAN
on backyard
astronomy p. 16
PLUS
- CHARTING the
19th-century heavens p. 52 - WE TEST Canon’s
new astrocamera p. 62
BONUS
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CONTENT
CODE p. 4
BONUS
ONLINE
CONTENT
CODE p. 4