Amazing Eclipse Timelapse Shows the Sun’s Chromosphere

by Nancy Atkinson on May 21, 2012

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We’ve added loads of images and videos to our eclipse gallery from last night annular solar eclipse, but this one stands on its own. An amazing timelapse video by Cory Poole was made from 700 photographs taken with a Coronado Solar Max 60 Double Stack telescope. Usually, the chromosphere can’t usually be seen due to the overwhelming brightness of the photosphere, and to see it requires special equipment. Thankfully, Poole has it: “The Telescope has a very narrow bandpass allowing you to see the chromosphere and not the much brighter photosphere below it,” Poole wrote on YouTube. Additionally, the special hydrogen alpha filter Poole used “only allows light that is created when hydrogen atoms go from the 2nd excited state to the 1st excited state.”

The chromosphere is the red circle around the outside of the Sun; its red coloring is caused by the abundance of hydrogen. Watch how the chromosphere appears along the outline of the Moon, too!

About 

Nancy Atkinson is Universe Today's Senior Editor. She also is the host of the NASA Lunar Science Institute podcast and works with Astronomy Cast. Nancy is also a NASA/JPL Solar System Ambassador.

briansheen May 22, 2012 at 9:53 AM

It is just possible that the Chromosphere effect shown in Cory’s video has some bearing on the black drop effect that will be seen when Venus enters or leaves the edge of the Sun?

I know there are other thoughts so just flying a kite.

Roseland Observatory.

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