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#lunar

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APOD from 2025-04-06

Moonquakes Surprisingly Common

Apollo seismometer data from 1972-77 detected 62 moonquakes near the surface, some strong enough to shift furniture. Unlike #Earth's quakes, the #moon's stiff rock vibrates longer. Causes may include Earth's tidal gravity and heat. Future #lunar homes must be quake-resistant. Buzz Aldrin is shown with a seismometer in an image.

HD image at apod.nasa.gov/apod/ap250406.ht #astronomy #universe

APOD from 2025-03-14

#Moon Pi and Mountain Shadow

A Full Moon occurs at 3.14 radians from the Sun, or Pi radians (180 degrees) in ecliptic longitude. On March 9, 2020, a full Moon rose as the Sun set, captured from Tenerife opposite the setting Sun and Teide's shadow. On March 14, 2025, at 06:55 UTC, it aligns again during a total #lunar #eclipse.

HD image at apod.nasa.gov/apod/ap250314.ht #astronomy #planet #earth #volcano #telescope