Harry is a U.K.-based senior staff writer at Live Science. He studied marine biology at the University of Exeter before training to become a journalist. He covers a wide range of topics including space exploration, planetary science, space weather, climate change, animal behavior, evolution and paleontology.
What's in the photo? A pair of wave clouds formed by island mountains.When was it taken? Jan. 8, 2023.
Wave clouds are repeating bands of cloud and non-cloud that look like wispy streaks floating in the sky when viewed from above or below. These bands are created when stable air moves over raised land. The topography pushes the air upward before gravity pulls it back down, causing the air to oscillate up and down, according to NASA's Earth Observatory.
Wave clouds are also known as gravity waves. This should not be confused with"gravitational waves," which are ripples in space-time created by extreme cosmic entities such as black holes and colliding galaxies.The wave cloud on the left of the image is formed by air passing over Mount Marion-Dufresne, a 3,576-foot-tall peak on East Island; the pattern on the right is caused by Mascarin Peak, a mountain on Possession Island that stands 3,064 feet tall.
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