Ghostly Moon 'Fog Bow' Glows Over Finland Lake (Photo)
Thomas Kast sent this photo of a lunar fog bow taken over a lake in Yli-Ii, Finland on Aug. 25.
Credit: © Thomas Kast, All Rights Reserved | Salamapaja

The ethereal light of a lunar fog bow made of moonlight and fog glows over a Finland lake in this beautiful night sky photo. 

Finnish photographer Thomas Kast took this stunning shot on a cold, foggy night around 1 a.m. local time on Aug. 25, from Yli-Ii, Finland.

  • Supermoon! Not only is it the biggest full moon of the year, it's super cool.
  • Full Moons: They come around every month and light up the night.
  • Lunar Eclipses: There's nothing more spectacular than a blood-red moon in Earth's shadow.
  • Blue Moon: They're rare and amazing, if not actually blue.
  • Solar Eclipses: The moon has the power to block out the sun!
"This lake remained clear for a long time. At one point I saw this white bow with the waning gibbous behind me. I had no clue what it was that I saw and started to take pictures," Kast wrote in an email.

Similar to a rainbow, tiny water droplets that cause fog reflect light. Lunar fog bows typically appear white because sunlight reflected from the moon is weak. Some photographers have also captured so-called "moonbows," which are similar to rainbows in that they do include colors.

The lunar fog bows lack of colors is caused by the smaller water drops … so small that the wavelength of light becomes important. Diffraction smears out colors that would be created by larger water drops in rainbows, according to NASA.

2013 Guy Ottewell's Astronomical Calendar. <a href="">Buy Here</a>
2013 Guy Ottewell's Astronomical Calendar. Buy Here
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To see more amazing night sky photos submitted by readers, visit our astrophotography archive.

Editor's note: If you have an amazing night sky photo you'd like to share for a possible story or image gallery, please contact managing editor Tariq Malik at

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