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NASA’s Astronomy Picture of the Day for Oct. 12, 2026, features a sequence of exposures showing Jupiter and its four bright Galilean moons aligned above Earth’s Moon. The image was taken 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, features a set of exposures showing Jupiter and four of its moons lined up above Earth’s Moon, which passed directly in front of the planet last week. Photographer Chirag Upreti captured the alignment from Westchester, New York, giving viewers a single composition that includes moons orbiting two different worlds.
The NASA Astronomy Picture of the Day (APOD) explanation says the image combines a series of exposures taken near the alignment. It identifies five visible moons: Jupiter’s Ganymede, Io, Callisto and Europa, along with Earth’s Moon, Luna. The four Jovian moons appear in a nearly vertical line above the Moon in the foreground.
From bottom to top, the APOD lists the satellites as Ganymede, Io, Callisto and Europa. Earth’s Moon appears at the lower left: its sunlit crescent is overexposed in the image, while its night side is faintly visible through earthshine—sunlight reflected from Earth onto the lunar surface and back toward the observer.
The picture was credited to Upreti, with the APOD explanation credited to Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti and Keighley Rockcliffe. NASA describes APOD as a daily service featuring a different astronomy image or photograph with an explanation written by a professional astronomer.
One View, Two Orbital Systems
The image offers an uncommon perspective on a lunar occultation of Jupiter: Earth’s Moon moved across the line of sight to the planet, while Jupiter’s large moons remained visible in the same sequence of exposures. The scene is useful as a visual reminder that the apparent alignment is a matter of perspective. The moons are not physically arranged in a straight line with Earth’s Moon; they appear aligned from the photographer’s location and viewpoint.
It also puts familiar objects in perspective. NASA’s APOD notes that Ganymede, Callisto and Io are larger than Earth’s Moon, while Europa is slightly smaller. Seeing them grouped in one frame makes the comparison immediate, even though the photograph is not a scale diagram and does not show their true relative distances.
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The Galilean Moons in View
The four satellites named in the image are commonly called Jupiter’s Galilean moons. They are among the planet’s most prominent natural satellites and can be observed from Earth with suitable viewing conditions and equipment. Their visibility in this composition, together with Earth’s Moon, is the result of the timing of the passage and the camera’s perspective.
NASA’s description says Earth’s Moon moved directly in front of Jupiter the week before the Oct. 12 publication. It does not provide the exact date or time of the passage in the supplied explanation. The APOD calls the featured picture a series of exposures taken near the alignment, rather than a single instantaneous view.
The NASA explanation also notes that the robotic spacecraft Juno is currently orbiting Jupiter and has made close passes near three of the four moons pictured. That supplies a spacecraft connection to the scene, though the APOD does not say Juno took part in capturing the image; it credits Upreti as the photographer.
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Image Timing and Viewing Conditions
The APOD material does not give the exact date, time or duration of the lunar passage, or the timing of each exposure in the photograph. It says only that the Moon crossed in front of Jupiter the previous week and that the exposures were made near the alignment.
The source also does not provide camera settings, the equipment used, or details about local weather and viewing conditions. The image is credited to Upreti, but the description does not specify how the exposures were combined or how much processing was applied. Those details should not be inferred from the picture alone.
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The Next APOD Image
The APOD page identifies its next scheduled picture as “Stairway to Heaven.” The Oct. 12 item is a daily image feature, not an announcement of a new NASA mission or a change in Juno’s status. The supplied source gives no further details about the next image or a related observing event.
Readers seeking more information about the Jupiter alignment can look to future NASA or APOD updates for additional image details, including precise exposure timing or observing conditions. No such details are included in the Oct. 12 explanation.
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Key Questions
What does the Oct. 12 APOD image show?
It shows Earth’s Moon and Jupiter’s four Galilean moons in a composition made from a series of exposures taken near their apparent alignment.
Which Jupiter moons are visible?
The APOD identifies Ganymede, Io, Callisto and Europa, listed from bottom to top in the image.
Why do the moons appear lined up?
Earth’s Moon passed directly in front of Jupiter from the viewpoint of the photographer. The apparent line-up reflects perspective and viewing geometry, not a physical arrangement of all five moons in space.
Where was the picture taken?
Photographer Chirag Upreti took the exposures from Westchester, New York, USA, according to the APOD credit.
Did NASA’s Juno spacecraft take the picture?
No. The APOD credits the image to Upreti. It mentions Juno separately, saying the spacecraft is orbiting Jupiter and has made close passes near three of the four moons shown.
Source: primary
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