Astronomy Picture of the Day ·

Moonquakes Surprisingly Common

The Astronomy Picture of the Day for July 21, 2019 is “Moonquakes Surprisingly Common,” an image. It is credited to Image Credit: NASA , Apollo 11 Crew. The original explanation runs about 145 words.

Moonquakes Surprisingly Common
Credit: Image Credit: NASA , Apollo 11 Crew Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Why are there so many moonquakes? Analyses of seismometers left on the moon by the Apollo moon landings reveals a surprising number of moonquake s occurring within 100 kilometers of the surface.”

— APOD editors, July 21, 2019

Read the full explanation on science.nasa.gov

At a glance

Date
July 21, 2019
Type
Image
Credit
Credit: Image Credit: NASA , Apollo 11 Crew
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 145 words

All of July 2019 → · 2019 by month → · Full archive since 1995 →

Topics in this entry

The MoonApollo program

Topics are matched from words in the title and explanation.

On this day: July 21 in other years

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Source

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.