2017

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level.

Gamma radiation from space has very high energy levels. What is the theoretical limit on the energies of gamma-ray photons? Is there a current technology to detect and measure the highest energy level?

Are there 3-D renderings of the Small and Large Magellanic Clouds available to view?

Exotic Objects, Science

Your October 2016 article on black holes describes a singularity with infinite density. It has been my understanding that anything with infinite density also has infinite mass and infinite gravitational attraction. Wouldn’t anything with infinite attraction collapse the universe?

Five Questions With David J. Eicher: Episode 11 – Heidi Hammel

Five Questions With David J. Eicher: Episode 10 – Sara Seager

If another planet existed that was precisely our size and in our exact orbit, but placed behind the Sun, would we have the means to detect its existence?

Say Betelgeuse

Uranus glows brightly

Exploring Capricornus

I often read about a sunspot on the western limb of the Sun, or a crater on the eastern limb of the Moon, etc. As there is no “up” in space, how are north, south, east, and west determined?

Track an asteroid pair

Entropy’s rainbow