Discover the cosmos!♪ Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.♪

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Explanation: What spooky planet is this?♪ Planet Earth on a dark and stormy night, of course.♪ The ghostly scene was photographed at Hverir, a geothermally active area found along northeastern Iceland's volcanic landscape.♪ Triggered by solar activity, geomagnetic storms have unleashed energetic particles trapped in Earth's magnetic field.♪ Penetrating the planet's upper atmosphere at high latitudes, the particles create auroral displays in the starry night sky.♪ Ghostly towers of steam and gas are venting from local fumaroles to dance against the eerie, greenish northern lights.♪ For now, auroral activity on planet Earth remains in a high state as the Sun is only in early phases of decline from the peak of its solar activity cycle.♪ And soon, other ghostly apparitions may dance in your neighborhood.♪ Happy Halloween!Tomorrow's picture: Sunday's Childe♪

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