Astronomy November 1999

Carl Sagan's Coming of Age. Mariner 2 proved Sagan's contention that greenhouse effect was scorching the surface of Venus.

When disaster strikes. Far from the peaceful place it seems, the universe is fraught with perils that could end life on Earth.

Are we alone? Scientific onferences don't have to be dull -- just get a bunch of astronomers together to talk about searching for intelligent life in the universe.

Adrift on the Sun. For the first time in 26 years, North Americans can watch Mercury transit the sun's disk.