A light-year

A light-year is how astronomers measure distance in space. It’s defined by how far a beam of light travels in one year – a distance of six trillion miles. Think of it as the bigger, badder cousin of the inch, the mile, the kilometer, and the furlong. If you like to keep up with what’s […]

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“There’s not an eclipse at every new and full moon, but there are from four to seven eclipses every year”

Why aren’t there eclipses at every full and new moon? There’s not an eclipse at every new and full moon, but there are from four to seven eclipses every year. Some are lunar, some are solar, some are total, and some are partial. A lunar eclipse happens when the Earth, sun and moon align in […]

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