Monday Astronomy Picture Ponderings 5/9/2022

Eclipsing the Sun

Sarah-Marie Cooper
5 min readMay 9, 2022
A dark orb of the moon partially covers the Sun from the upper right side during a partial solar eclipse. It is covering less than half of the Sun.
Partial Solar Eclipse Oct. 23, 2014 By Tomruen — Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=36349192

Welcome back to the Monday Astronomy Picture Ponderings (MAPPs) series where every Monday I normally pick one of NASA’s Astronomy Picture of the Day (APOD) entries from the past seven days to focus on in some way.

On May 2nd, 2022, NASA Astronomy Picture of the Day featured a copyrighted image of the partial solar eclipse over Argentina two days before. The feature image above is a public domain image of a partial eclipse for our article today. So what is a solar eclipse? What about a partial one? Can solar eclipses happen on places other than Earth? Let’s find out!

What is a (partial) solar eclipse)?

Very briefly, a solar eclipse occurs when the moon passes between the Earth and the Sun, briefly blocking out the light from the Sun, totally or partially.

But, if the moon orbits the Earth once every 28 days, shouldn’t it pass between the Earth and the Sun pretty frequently? Shouldn’t we have a solar eclipse on a pretty frequent basis?

The geometry behind a total solar eclipse is depicted, showing the angles of light from the Sun hitting the moon and casting shadows on the surface of the Earth.
Geometry of a total solar eclipse (not to scale) By Sagredo — Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3653837

The moon has to line up perfectly with the Sun and the Earth for an eclipse to occur. Since…

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Sarah-Marie Cooper
Sarah-Marie Cooper

Written by Sarah-Marie Cooper

Author & Writer | Querying my YA Fantasy novel |Top Writer in Space | A little bit of everything: writing, science, personal growth, fiction, social criticism

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