Magazine

Science

If time stops at a singularity, how can massive black holes grow?

Observing

Phil Harrington’s binocular universe: Get a head start on the Hydra

Telescopes and Equipment

Should I purchase a 1¼” or 2″ star diagonal for my new telescope?

Alien Life, Science

What is the theory of panspermia?

Telescopes and Equipment

Fixing an old scope

Science

Fly over and above the Square Kilometer Array

Stars

Seek out two variables

Solar System

Message from the innermost planet

Robotic Spaceflight

Talking to spacecraft

Telescopes and Equipment

View dark nebulae with your Meade scope

Alien Life, Science

Bob Berman’s strange universe: Ask the aliens

Human Spaceflight

Does the debris left behind by comets pose a hazard to the International Space Station?