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NASA’s Astronomy Picture of the Day for Oct. 12, 2026, features a series of exposures showing Jupiter and its four bright Galilean moons near Earth’s Moon. The view was captured from Westchester, New York, as the Moon passed directly in front of Jupiter last week.
NASA’s Astronomy Picture of the Day for Oct. 12, 2026, shows Jupiter and its four bright Galilean moons lined up near Earth’s Moon, which passed directly in front of the planet last week. The series of exposures was taken from Westchester, New York, and makes five moons visible across the image: four orbiting Jupiter and Luna, Earth’s Moon.
The image combines a series of exposures taken near the alignment, rather than presenting the objects as they would appear in one ordinary exposure. NASA’s accompanying explanation says the Moon’s sunlit crescent appears overexposed at the lower left. Its night side is faintly visible at the upper right because of earthshine—sunlight reflected from Earth onto the lunar surface.
Above the Moon, Jupiter’s four bright Galilean satellites appear in an almost vertical line. NASA lists them from bottom to top as Ganymede, Io, Callisto and Europa. The arrangement is the result of the objects’ apparent positions from Earth at the time, not a single straight-line formation in space.
NASA credits the photograph to Chirag Upreti. The Astronomy Picture of the Day is published with a short explanation written by a professional astronomer; the Oct. 12 entry lists Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti and Keighley Rockcliffe among its authors and editors.
Five Moons in One View
The image shows objects at very different distances appearing close together in the frame. Earth’s Moon is nearby by astronomical standards, while Jupiter and its moons are far across the solar system. Their apparent proximity reflects the viewing angle from Earth, not a close physical relationship between the systems.
The scene also illustrates why astronomical images sometimes use multiple exposures. The bright crescent and dimmer earthlit portion of the Moon have very different brightness levels. A single exposure capable of preserving the crescent’s detail might not reveal the night side clearly; combining exposures can show both features, while NASA’s description identifies the crescent as overexposed in this image.
NASA notes that three of the four moons shown—Callisto, Ganymede and Io—are larger than Earth’s Moon. Europa is slightly smaller.
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Jupiter’s Galilean Satellites
The four objects featured around Jupiter are known as the Galilean satellites, a name for Jupiter’s four bright moons: Ganymede, Io, Callisto and Europa. They orbit Jupiter, while Luna orbits Earth. NASA’s APOD explanation uses the image to identify the moons in their apparent order above Earth’s Moon.
The image was possible because, as NASA reports, Earth’s Moon moved directly in front of Jupiter last week. The word “in front” describes the line of sight from the observer’s location; it does not mean the Moon physically approached Jupiter. The photograph’s multiple exposures were made near that apparent alignment from Westchester, New York.
NASA also notes that its Juno spacecraft is currently orbiting Jupiter and has made close passes near three of the four moons pictured. The APOD entry does not identify which three in this item or connect a particular Juno pass to the photograph; the spacecraft reference supplies broader mission context.
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Image Details Not Specified
NASA’s entry gives the photographer’s credit and the location, but does not provide the exact date and time of the exposures, the telescope or camera used, or the number of frames combined. It describes the work as a series of exposures taken near the alignment, without detailing the processing steps.
The APOD description also does not give the Moon’s angular separation from Jupiter, the duration of the event, or observing conditions. Those details should not be inferred from the image alone. NASA’s statement that Juno has made close passes near three of the moons is included without further mission dates or a list of those three in the supplied explanation.
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APOD’s Next Daily Image
The Oct. 12 entry lists the next day’s Astronomy Picture of the Day as “Stairway to Heaven.” NASA’s APOD service publishes a different space image or photograph each day with an accompanying explanation, so the next entry is the immediate follow-up in the series.
No further observing event or Juno milestone is announced in the Jupiter-and-moons entry. Readers seeking additional technical information about this particular photograph would need details beyond those provided in NASA’s caption.
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Key Questions
What does NASA’s October 12 image show?
It shows Earth’s Moon and Jupiter’s four bright Galilean moons in a near-aligned view. NASA says the image was assembled from exposures taken near the alignment from Westchester, New York.
Which Jupiter moons appear in the image?
From bottom to top above Earth’s Moon, NASA identifies them as Ganymede, Io, Callisto and Europa.
Why is the Moon’s dark side faintly visible?
NASA attributes the faint light on the Moon’s night side to earthshine, sunlight reflected from Earth onto the lunar surface. The bright crescent is overexposed in the featured image.
Did Earth’s Moon physically pass close to Jupiter?
No. NASA says the Moon moved directly in front of Jupiter from the perspective of the image’s observers. This describes an apparent alignment along the line of sight, not a close encounter in space.
What is Juno doing at Jupiter?
NASA says the Juno spacecraft is currently orbiting Jupiter and has made close passes near three of the moons shown. The APOD entry does not provide further details about those passes.
Source: primary
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