Do the clusters of water and ice particles that make up clouds really float in the sky?
Photographers hoping to capture stunning "night-shining" clouds have been left frustrated this year. The fast-approaching solar maximum may be to blame.
At least three separate optical phenomena are visible in the new images. Each of which is created by light refracting through millions of perfectly aligned ice crystals in the upper atmosphere.
Look North as the stars appear in June and July to have a chance of seeing rare noctilucent (or 'night-shining') clouds with the naked eye.
What it's like to skydive through a cloud depends in part on the type of cloud, but regardless, you'll likely end up cold and wet.
The rays appear when sunlight shines through gaps in the cloud during sunrise or sunset and have never been seen this clearly on the Red Planet before.
Rare clouds that give off bright, multi-colored light like an aurora were recently spotted at multiple locations in the Arctic. But what causes them?
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