Perigee Syzygy

Photograph taken by on Sunday, December 03, 2017
Full Moon

Full Moon

As you probably learned in school, the moon’s orbit around the earth is not circular but elliptical. On average, the moon is 385,000 kilometers (239,000 miles) from earth but tonight is was at perigee, that is at the closest point in its orbit to the earth, and 357,492 km (222,135 miles) from earth. It’s also near syzygy, which is when the moon, earth, and sun all line up (which is when there is a lunar or solar eclipse). Because it’s not exactly at syzygy, it’s just a bigger than normal full moon. George loaned me his telescope a while back and I got it out this evening to see if I could get anything worth while. I bought a t-ring adapter and this is my first chance to use it.

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