{"id":803922,"date":"2026-10-06T06:40:31","date_gmt":"2026-10-06T11:40:31","guid":{"rendered":"https:\/\/spaceweekly.com\/?p=803922"},"modified":"2026-10-06T06:40:31","modified_gmt":"2026-10-06T11:40:31","slug":"solar-systems-most-bizarre-moons-take-the-tour","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=803922","title":{"rendered":"Solar system\u2019s most bizarre moons! Take the tour"},"content":{"rendered":"


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When humans began exploring our solar system \u2014 the moons, planets, asteroids and comets orbiting our sun \u2014 we found not all moons were as cold and inactive as our moon. Here\u2019s a tour of some of our solar system\u2019s most bizarre moons. Images via NASA.<\/figcaption><\/figure>\n

The solar system\u2019s most bizarre moons<\/h3>\n

Some of the most bizarre worlds in our solar system are moons. That is, they don\u2019t orbit our sun directly, but instead orbit planets, dwarf planets or even asteroids. From icy geysers to endless volcanic eruptions to hidden oceans, these natural satellites have proven much more dynamic than our own dormant moon.<\/p>\n

Here\u2019s a quick tour of some of the strangest moons in our solar system.<\/p>\n

You deserve a daily dose of good news.<\/strong> For the latest in science and the night sky, subscribe to EarthSky\u2019s free daily newsletter.<\/p>\n

#1 Io: A world of nonstop volcanoes<\/h3>\n

Orbiting Jupiter, Io is the most volcanically active world in the solar system. Its surface is constantly being reshaped by eruptions that send plumes hundreds of miles into space.<\/p>\n

Unlike Earth\u2019s volcanoes, Io\u2019s are driven by tidal heating. That means that Jupiter\u2019s immense gravity stretches and squeezes the little moon. And, as it does so, friction builds up inside, melting rock into magma. <\/p>\n

The result is a surface dotted with lava lakes and sulfur deposits. There are no visible impact craters \u2014 because eruptions constantly resurface this little world.<\/p>\n

\"Brownish,
View larger. | NASA\u2019s Juno spacecraft captured this detailed view of Jupiter\u2019s moon Io on October 15, 2023. In 2024, Io\u2019s volcanoes were the focus of a study that concludes they are billions of years old, originating from a time when the moon first formed. Image via NASA\/ JPL-Caltech\/ SwRI\/ MSSS\/ Ted Stryk.<\/figcaption><\/figure>\n

#2 Europa: An ocean beneath the ice<\/h3>\n

Another of Jupiter\u2019s moons, Europa, looks smooth and icy on the outside. But beneath that frozen shell lies a global ocean of liquid water. Scientists believe this ocean may contain more water than all of Earth\u2019s oceans combined. Reddish cracks crisscross the surface, likely caused by ice shifting over the ocean below.<\/p>\n

Because earthly scientists believe liquid water is a key ingredient for life, Europa is one of the most promising places to search for life in the solar system. Future space missions, including NASA\u2019s Europa Clipper, aim to study this hidden ocean in detail.<\/p>\n

\"Whitish
This image of Jupiter\u2019s moon Europa is a composite from the Galileo spacecraft. It consists of images acquired in 1995 and 1998. Image via NASA\/ JPL-Caltech\/ SETI Institute.<\/figcaption><\/figure>\n

#3 Enceladus: Geysers in space<\/h3>\n

Enceladus blew scientists\u2019 minds when NASA\u2019s Cassini mission discovered jets of water vapor blasting from the south pole of this Saturn moon.<\/p>\n

These geysers erupt from an underground ocean, which \u2014 in the little moon\u2019s relatively weak gravity \u2014 spray material into space. This material feeds Saturn\u2019s E ring! Even more intriguing, the water vapor plumes issuing from Enceladus\u2019 hidden ocean contain complex organic molecules \u2014 the building blocks of life.<\/p>\n

\"Brownish
NASA\u2019s Cassini spacecraft captured this view of Enceladus and its water vapor plumes in 2010. Image via NASA\/ JPL\/ Space Science Institute\/ Freie Universit\u00e4t Berlin.<\/figcaption><\/figure>\n

#4 Titan: Lakes of methane<\/h3>\n

The largest moon of Saturn is Titan. It\u2019s the only moon in our solar system with a thick atmosphere. Scientists say it has weather, rivers and lakes. But those lakes aren\u2019t filled with water. Instead, they contain liquid methane and ethane.<\/p>\n

This hazy, orange world hosts a methane cycle similar to Earth\u2019s water cycle, complete with clouds and rain. Beneath its surface, Titan may also harbor a subsurface ocean of water.<\/p>\n

NASA\u2019s Dragonfly mission is currently scheduled to launch in 2028 and arrive at Titan in 2034. Once it lands, the drone-like spacecraft will hop across Titan\u2019s alien landscape.<\/p>\n

\"Large
View larger. | Titan has lakes and seas of liquid methane and ethane on the surface. Ligeia Mare is the 2nd-largest sea on Titan. You can also see rivers in this radar image from the Cassini spacecraft in 2013. Image via NASA.<\/figcaption><\/figure>\n

#5 Mimas: Death Star\u2019s twin<\/h3>\n

When people see Saturn\u2019s 7th-largest satellite Mimas, they think of the Death Star. The two have a very similar shape, sporting a larger crater in the northern hemisphere that takes up a good deal of territory. In fact, many people think the Death Star was modeled on the moon Mimas.<\/p>\n

In reality, the original Star Wars<\/em> movie came out on May 25, 1977. But we didn\u2019t get a closeup look at Mimas until Voyager 1 passed it in 1980. So, the resemblance is just coincidental.<\/p>\n

The crater, named after William Herschel \u2014 who discovered the moon as a tiny dot in his telescope \u2014 is 86 miles (138 km) across. The terrain shows the entire satellite felt the shockwaves from the impact that created this mighty crater on Mimas.<\/p>\n

\"Most
The most significant feature on Saturn\u2019s moon Mimas is its Herschel crater, which stretches 1\/3 of the way across the little moon\u2019s face. It makes the moon resemble the Death Star from Star Wars<\/em>. Image via NASA\u2019s Cassini spacecraft on its closest-ever flyby of Mimas.<\/figcaption><\/figure>\n

#6 Miranda: A patchwork world<\/h3>\n

Miranda, a small moon of Uranus, looks like it did shatter \u2026 and then reassemble. Its surface is a crazy quilt of textures and ages. It might also be home to the tallest cliff in our solar system. Verona Rupes is a 12-mile (20-km) high scarp. <\/p>\n

One theory suggests Miranda broke apart in a massive impact. The pieces then reassembled themselves through gravity into the Frankenstein-like appearance this moon has today.<\/p>\n

\"Most
The Voyager 2 spacecraft took this image of Uranus\u2019 moon Miranda on January 24, 1986. Research shows Miranda might have an ocean beneath its surface. Image via NASA\/ JPL-Caltech\/ Johns Hopkins.<\/figcaption><\/figure>\n

#7 Triton: A captured rebel<\/h3>\n

Neptune\u2019s large moon Triton orbits in the direction opposite<\/em> its planet\u2019s rotation. So it likely didn\u2019t form there, but instead is a captured Kuiper Belt object.<\/p>\n

Triton is also geologically active, with nitrogen geysers erupting from its frozen surface. It\u2019s one of the most intriguing \u2014 and least explored \u2014 moons.<\/p>\n

\"Wide
The Webb space telescope captured this wide-field image of Neptune and its rings. The bright blue spot to Neptune\u2019s upper left is the moon Triton. Image via NASA\/ ESA\/ CSA\/ STScI.<\/figcaption><\/figure>\n

Why these bizarre moons matter?<\/h3>\n

These bizarre moons can help scientists understand how planetary systems evolve. They show the complexity and diversity of distant worlds. Some even provide potential<\/em> for life far from the sun\u2019s warmth.<\/p>\n

Future missions (such as JUICE, Dragonfly and Europa Clipper) will continue to explore these strange satellites, searching for answers to some of the biggest questions in science: How do worlds form? What makes one world habitable and another not? Are we alone?<\/p>\n

Bottom line: The solar system\u2019s most bizarre moons reveal active, complex worlds that continue to surprise scientists. Are any of them harboring life?<\/p>\n

Read more: Is there enough water on the moon for future cities?<\/p>\n

Read more: The tally is in! 6,000 exoplanets now confirmed<\/p>\n

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Kelly Kizer Whitt<\/h4>\n

View Articles\n <\/p><\/div>\n

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About the Author:<\/h6>\n

Kelly Kizer Whitt writes and edits some of the most fascinating stories at EarthSky.org. She’s been writing about science, with a focus on astronomy, for decades. She began her career at Astronomy Magazine and made regular contributions to other outlets, including AstronomyToday and the Sierra Club. She has nine published books, including a children’s picture book, Solar System Forecast, and a young adult dystopian novel, A Different Sky.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n


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