Secret Sky: Undset’s forgotten mountain

On the evening of Sept. 23, 2023, I was training my 3-inch Tele Vue refractor on the Moon to catch sunrise over Lambert Crater when a brilliant pyramid of light just to the east of the crater grabbed my attention instead. This isolated peak was the brightest feature to emerge from the lunar twilight thatContinue reading “Secret Sky: Undset’s forgotten mountain”
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