BLACK
HOLES
HOW THEY EXPAND
Einstein’s
theories p. 20
JULY 2018
EXPLORING
moons and planets
with submarines p. 44
DISCOVER
deep-sky gems
in Cygnus p. 54
MUST SEE! The year’s best meteor shower p. 32
Vol. 46
- Issue 7
The world’s best-selling astronomy magazine
BOB BERMAN on the Super Moon p. 12
TESTED: Sigma’s new 20mm lens p. 60
NEW RESEARCH
BONUS
ONLINE
CONTENT
CODE p. 4
BONUS
ONLINE
CONTENT
CODE p. 4