Astronomy
and Sky and Telescope are
two popular astronomy magazines intended for general audiences.
The Astronomical Society of the Pacific (PASP) sells posters, slides,
and videos, and is a great source of popular information.
Science News is a
good weekly news magazine reviewing all of science.
Scientific
American is very famous, even though I can't understand any
of its articles outside of astronomy. It seems very specialized
and poorly edited to me.
Discover
Magazine covers lots of popular science but includes
conspiracies, ETs, and UFOs too.
Nature is a leading
professional journal for announcing discoveries in astronomy and
many other fields.
Aviation Week and Space
Technology is an aviation industry technical magazine.
Quest
is a magazine devoted to the history of space flight.
The Astrophysical
Journal is the world's premier publication for professional
astronomers. I have published over a hundred articles in it.