Io - Full Disk Centered on Media Regio
Astronomy Lists

10 Interesting Facts about Io

Of Jupiter’s Galilean moons, Io is the closest to the planet at an average distance of 422,000 km (262,219 miles), and is the moon with the highest density. It is also the solar system object

Europa
Astronomy Lists

10 Interesting Facts about Europa

Europa is the smallest of Jupiter’s Galilean moons, and while it is only slightly smaller than our own Moon, it is nevertheless the 15th biggest object in the solar system, and more massive than all

Callisto, Earth & Moon comparison
Astronomy Lists

10 Interesting Facts about Callisto

Callisto is Jupiter’s second-biggest moon, and the third-biggest moon in the solar system, after another one of Jupiter’s moons, Ganymede, and then Titan, the largest moon of the planet Saturn. As with Jupiter’s main moons

10 Interesting Facts about Ganymede
Astronomy Lists

10 Interesting Facts about Ganymede

Ganymede is the biggest satellite in the solar system, and also the biggest object in the solar system that does not have a substantial atmosphere. Discovered by Galileo in January of the year 1610 along

Giant-impact Hypothesis
Astronomy Lists

Top Theories on How the Moon Formed

The Moon has been a constant source of wonder and fascination throughout mankind’s’ history, but despite being located a mere 238,900 miles or 1.28 light-seconds away, we know less about it and how it came

Venus
Astronomy Lists

10 Fun Venus Facts for Kids

Venus, often referred to as Earth’s “sister planet” because of its similar size and composition, is a captivating world of extremes. Its blistering surface and thick, toxic atmosphere create some of the most inhospitable conditions

Astronomy History

10 Top Astronomers from the Ancient World

From the western historical perspective, it is sometimes easy to focus on the astronomical works of early Greek astronomers too tightly, while overlooking the worthy contributions made by earlier philosophers from other cultures that have

The Orion Nebula (M42 and M43) on December 28th, 2013
Astronomy Lists

10 Interesting Orion Nebula Facts

Most people mistake the Orion Nebula for a star in the constellation of Orion, but it is actually the most easily detectable naked-eye nebula in the entire night sky. This magnificent star-forming region is also