Magazine

Robotic Spaceflight, Science, Solar System

How we study our planet

Observing

April 2025: What’s in the Southern Hemisphere sky this month?

Observing

April 2025: What’s in the sky this month? Jupiter and Mars remain prominent, while Venus, Mercury, and Saturn rule the morning skies

Stars

Will Sirius B explode as a type Ia supernova?

Science

M17 stars in a cosmic vista

Telescopes and Equipment

What is the difference between a 2″ eyepiece and a 1¼” eyepiece?

Deep-Sky Objects

Observe the brightest deep-sky objects

The Moon, Upcoming Events

How to get the most out of the next lunar eclipse

Science, Solar System

How much less would you weigh on the Moon than on Earth?

Telescopes and Equipment

We test Starfield Optics’ 115mm Géar Triplet APO

The Moon, Upcoming Events

Look for these effects during the next lunar eclipse

Robotic Spaceflight, Space Exploration

The new golden age of Moon exploration