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October 2025

NASA Science Calendar Image of the Month. Image credit: NASA/Jet Propulsion Laboratory–Caltech/Southwest Research Institute (SwRI)/Malin Space Science Systems (MSSS). Image processing: Emma Wälimäki © CC BY

Jupiter's moon Io appearing golden-tan against the blackness of space, half the moon bathed in shadow, half in light, bisected vertically, with mountain peaks and volcanos pockmarking the surface.

October 2025 Image

Learn about October's amazing image. Explore related topics, activities, games, and download desktop wallpaper.

Jupiter’s Volcanic Moon Io

  • During its close flyby of Jupiter’s moon Io on December 30, 2023, NASA’s Juno spacecraft captured some of the most detailed imagery ever of Io’s volcanic surface. In this image, taken by the JunoCam instrument from about 930 miles (1,500 kilometers) above the moon, Io’s night side [left lobe] is illuminated by “Jupitershine,” which is sunlight reflected from the planet’s surface.

    Image and text credit: NASA/Jet Propulsion Laboratory–Caltech/Southwest Research Institute (SwRI)/Malin Space Science Systems (MSSS). Image processing: Emma Wälimäki © CC BY

    Learn more about processing the sharpest images of Io in a generation

    Jupiter's moon Io appearing golden-tan against the blackness of space, half the moon bathed in shadow, half in light, bisected vertically, with mountain peaks and volcanos pockmarking the surface.

You can do planetary science!

  • Volunteer individuals or organizations from anywhere and with any amount of scientific background help complete NASA planetary research in myriad ways, including building radio telescopes, writing software, creating mission-based artwork, translating project materials into other languages, engaging in research at observatories, and writing (and winning) telescope use proposals.

    Learn how you can get involved

    This image was captured by the JunoCam imager aboard NASA's Juno spacecraft on Julyy 21, 2019, during Juno's 20th perijove pass.
    PIA24295
    Image data: NASA/JPL-Caltech/SwRI/MSSS, Image processing: Gerald Eichstädt / Sean Dorán / MEO © CC NC SA

Discover More about Jupiter's Moon Io

Jovian clouds in striking shades of blue are evident in this view taken by NASA's Juno spacecraft on Oct. 24, 2017.

Citizen Science: JunoCam

This month's calendar image was processed by a member of the JunoCam Citizen Science project. Click below to find out how you can join.

Two-step photo showing a simple homemade spacecraft model made from craft sticks, foil, and a paperclip placed on an image of Jupiter. In the second step, a person uses a marker to draw on the Jupiter image near the model.

Make a Jupiter Orbiter

With a few simple items, you can make a Jupiter spacecraft, complete with "magnetometer."

Black and white outline drawing of Jupiter with swirling storm patterns, designed as a coloring page. Title at top reads ‘Color Jupiter: A Swirling Storm’ with NASA logo in the corner.

Coloring Jupiter

Download Jupiter coloring pages and share your vision of its swirling storms and clouds.

A view of Jupiter's Great Red Spot and colorful cloud bands of tan, brown, white, and orange as seen from the Juno spacecraft.

Jupiter Resources

A curated collection of resources, including activities, videos, animations, posters, and online interactives.

An abstract drawing of Jupiter’s Great Red Spot and orange stripes with text that says, 'Jupiter: Finest storm watching in the solar system!'

Space Place: Jupiter

Designed for younger learners, Space Place has fun facts, activities and games about Jupiter and our solar system.

A closeup of an icy world with cryovolcanic eruptions fills the bottom of the image. Jupiter and Saturn are visible in the starry sky as crescents. Moons such as Io, Ganymede, Callisto, Titan, and Europa orbit them in the foreground.

Astrobiology: Graphic Novels

This series of graphic novels focuses on the search for life and habitability in our solar system, much like what Europa Clipper will do.

Eyes on the Solar System banner displaying Juno spacecraft in the bottom right, Mars 2020 EDL on the left, Mars in the bottom left and Jupiter in the top right. We can see The Earth in the distance.

NASA Eyes on the Solar System

Find NASA spacecraft, including Juno and Europa Clipper, in real time in space with this 3D interactive, desktop app.

Multicolor orbit paths of planets in the solar system

Solar System Treks

Trek across Io and other celestial bodies with this interactive, 3D app.

Jupiter Facts

Jupiter is the fifth planet from the Sun and the largest in the solar system, more than twice as massive as the other planets combined.

A reddish moon with lumps and splotches indicating volcanic activity.

Io and the moons of Jupiter

Io is just one of the 95 moons and countless other small objects in Jupiter's oribit. Jupiter's four largest moons -- Ganymede, Callisto, Io, and Europa -- were the first moons discovered beyond Earth's Moon.

This illustration depicts NASA's Juno spacecraft in orbit above Jupiter's Great Red Spot.

Juno's mission to Jupiter

After 1.7 billion-mile journey from Earth, evading showers of the most punishing radiation outside the Sun, Juno has provided breathtaking images and breakthrough discoveries from Jupiter and its moons.

Europa Clipper mission to Europa

When it arrives in 2030, Europa Clipper will study the vast ocean and rocky bottom beneath that moon's icy crust, searching for signs of habitability.

Explore our other featured images

A vivid aurora borealis in shades of purple, green, and pink illuminates the night sky, reflected on a calm body of water with a silhouette of rolling hills in the distance. NASA logo and text 'National Aeronautics and Space Administration' are visible in the upper corners.

January 2025

A digital NASA image depicting a sequence of asteroids arranged in a curved trajectory against a black background. The NASA logo appears in the upper right corner, and the text 'National Aeronautics and Space Administration' is visible in the upper left. The bottom left corner includes the URL 'www.nasa.gov.'

February 2025

Computer monitor displaying a vibrant scientific visualization with blue, red, and green cell-like patterns.

March 2025

Air and Ocean Views

April 2025

Cool as Ice

May 2025

Colorful composite image of the supernova remnant Cassiopeia A, showing intricate, glowing filaments in blue, red, green, and yellow. Captured using NASA’s James Webb and Chandra telescopes, the image reveals expanding shockwaves and stellar debris from the exploded star, set against a star-filled background.

June 2025

July 2025

This face-on view of spiral galaxy NGC 628 is split diagonally, showing observations from the James Webb Space Telescope (JWST) in the top left portion of the image and Hubble Space Telescope (HST) in the bottom right portion. JWST�s observations combine near- and mid-infrared light, while HST�s observations showcase visible light. Complementary views show predominantly stars (HST) and obscuring dust (JWST). In JWST�s high-resolution infrared images, the gas and dust stand out in stark shades of orange and red and show finer spiral shapes with the appearance of jagged edges, though these areas are still diffuse. In HST�s images, the gas and dust show up as hazy dark brown lanes, following the same spiral shapes. HST�s images are about the same resolution as JWST�s, but the gas and dust obscure a lot of the smaller-scale star formation. Image and text credit: NASA, European Space Agency (ESA), Canadian Space Agency (CSA), Space Telescope Science Institute (STScI), Janice Lee (STScI), Thomas Williams (University of Oxford), Physics at High Angular resolution in Nearby GalaxieS (PHANGS) Team

August 2025

Thinning Arctic Sea Ice

September 2025

Jupiter's moon Io appearing golden-tan against the blackness of space, half the moon bathed in shadow, half in light, bisected vertically, with mountain peaks and volcanos pockmarking the surface.

October 2025