Hey, What’s Your Sign?


Behold: a faint band of light reaching above the western horizon just after sunset last Sunday in rural Illinois. But what could it mean? To wit:

Taken from an old farmstead, the luminous glow is zodiacal light, prominent in the west after sunset during planet Earth’s northern hemisphere spring. On that clear evening the band of zodiacal light seems to engulf bright yellowish Mars and the Pleiades star cluster. Their close conjunction is in the starry sky above the old barn’s roof. Zodiacal light is sunlight scattered by interplanetary dust particles that lie near the Solar System’s ecliptic plane. Of course all the Solar System’s planets orbit near the plane of the ecliptic, within the band of zodiacal light. But zodiacal light and Mars may have a deeper connection. A recent analysis of serendipitous detections of interplanetary dust by the Juno spacecraft during its Earth to Jupiter voyage suggest Mars is the likely source of the dust that produces zodiacal light.

(Image: Joshua Rhoades)


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2 thoughts on “Hey, What’s Your Sign?

  1. Harry

    The constellation at the top left hand side in the wonderful photo is Orion and under the 3 stars of its belt, visible in the photo is the Orion Nebula, a birth place of new stars. And folks Orion is currently visible from Dublin along with the Pleiades star cluster, well worth viewing with a basic pair of binoculars.

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