Short answer up top: the zodiacal light is a faint, luminous band of sunlight scattered off interplanetary dust, and it's bright enough to photograph from a dark enough sky. NASA's Astronomy Picture of the Day for September 19, 2026, "A Zodiacal Night," shows exactly that: a glowing column stretching toward the zenith over the Hanle Dark Sky Reserve in Ladakh, India, at roughly 4,500 meters of altitude, captured by photographers Neelam and Ajay Talwar just before the start of astronomical twilight.
What am I actually looking at in the image?
Two observers stand beneath a band of light rising from the horizon toward the top of the sky. Jupiter sits low near the eastern horizon, immersed in the glow itself. Closer to the center of the frame, the open star cluster M44 — the Beehive Cluster — appears near a yellowish-tinted Mars. None of this is a cloud, an aurora, or light pollution. It's sunlight, scattered back toward Earth by countless dust particles spread through the inner solar system.
Why does it look like a second dawn?
Zodiacal light has another name worth knowing: the "false dawn." That nickname comes from where and when it shows up — along the same band of sky where the Sun, Moon, and planets always travel, the ecliptic, and often glowing faintly before sunrise or after sunset in a way that can be mistaken for the first hint of daylight. It isn't a coincidence that it follows the ecliptic so precisely. The dust producing it isn't scattered randomly around Earth; it's concentrated in the same flattened plane the planets themselves orbit in, which is exactly why the glow traces that band across the sky rather than appearing as a diffuse haze everywhere.
Where does all that dust come from?
This is where the September 19 image connects to something genuinely surprising: according to NASA, dust measurements from the Juno spacecraft point toward Mars itself as a source of the material that backscatters sunlight and produces zodiacal light. Juno wasn't built to study Mars up close — it's a Jupiter orbiter — but instruments sensitive enough to detect interplanetary dust along its trajectory picked up a pattern consistent with Mars contributing to that dust population. It's a reminder that a planet doesn't need active volcanoes or rings to keep shedding material into space; impacts and other processes can slowly seed the space around a planet's orbit with dust that then drifts through the whole inner solar system.
Why the same plane keeps showing up
If this sounds familiar, it should. The ecliptic is the same plane that makes eclipses possible, the same plane occultations line up on, and the same plane every planet in the solar system roughly shares as it orbits the Sun. Zodiacal light is a direct, visible demonstration of that shared plane: it's what you get when you shine sunlight through a disk of dust that has settled into the same flattened arrangement as the planets themselves, for the same gravitational reasons.
See the plane for yourself
That's exactly the geometry the real-time 3D simulator at Solar System Live is built to show. Pull up the current positions of Mars and Jupiter, and you'll see them sitting close to the same flat plane the simulator uses to lay out every orbit — the very same plane responsible for the glowing band photographed over Ladakh. You won't see the dust itself in the simulator, but you'll see exactly why it lines up where it does: because everything in the inner solar system, dust included, shares the same orbital neighborhood.
The next clear, dark night away from city lights, look for a faint column of light rising before dawn or lingering after dusk along that same band. It's sunlight on debris that may have drifted, in part, from Mars.