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 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 …
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 …
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, 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 …
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 …
Mars has been in the human consciousness since pre-historic times, and can easily be seen as noticeably red with the naked eye as a result of iron oxides in its surface material. At its closest …
Although some stargazers may consider the Moon to be a nuisance that spoils their night-time viewing, the truth of the matter is that the Earth’s only natural satellite has enough features to offer a lifetime …
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 …
Andromeda is also called Messier 31, or M31 for short, after French astronomer Charles Messier, who cataloged about 100 stellar objects in 1771. M31 is considerably larger than our own galaxy, being approximately 260,000 light-years …
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