Earth Equinox Size:30" x 30" (76 cm x 76 cm) in this view of the

in this view of the two posing before the planet and its rings from NASA's Cassini spacecraft

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are silhouetted against a colorful background of glowing

they can erupt

a burst of star formation has recently taken place

Earth Equinox Size:30" x 30" (76 cm x 76 cm) in this view of theFrom a geostationary orbit 36,000 kilometers above the equator, Russian meteorological satellite Elektro L takes high resolution images of our fair planet every 30 minutes. But only twice a year, during an Equinox, can it capture an image like this one, showing an entire hemisphere bathed in sunlight. At an Equinox, the Earth's axis of rotation is not tilted toward or away from the Sun, so the solar illumination can extend to both the planet's poles.