WWW.ASTRONOMY.COM 21Einstein’s
relativity
replaced
Newton’s
gravity. Now
observations
of black holes
might test
the limits
of Albert’s
masterpiece.
by Jesse Emspak
RIGHT OR WRONG?
VITY
The event horizon of
the supermassive black
hole at the center of
the Milky Way appears
dark against a bright
maelstrom of swirling
gas and infalling matter.
Astronomers hope
to probe general
relativity’s limits by
imaging this black hole.
ADOLF SCHALLER FOR ASTRONOMY