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IT’S NOT JUST IN YOUR MIND!

Planetary dawn spectacular

[CLICK ON IMAGE FOR HIGH RESOLUTION, Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)]

eclipticPlanet Earth’s horizon stretches across this recent Solar System group portrait, seen from the southern hemisphere’s Las Campanas Observatory.

Taken before dawn it traces the ecliptic with a line-up familiar to November’s early morning risers. Toward the east are bright planets Venus, Mars, and Jupiter as well as Regulus, alpha star of the constellation Leo.

Of course the planets are immersed in the faint glow of zodiacal light, visible from the dark site rising at an angle from the horizon.

The Solar System’s planets all orbit near the ecliptic plane, while dust near the plane scatters sunlight, the source of the faint zodiacal glow.

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