Stratospheric wind and water vapour fluctuations on tidally locked exoplanets

Wind currents in the Earth’s equatorial stratosphere change direction every 26-28 months. Abundances of ozone, methane, water vapour, and other trace atmospheric gasses oscillate on the same timescale. This phenomenon is known as the “quasi-biennial oscillation” (QBO) and also occurs on other solar system planets (Jupiter and Saturn), though with different periods. It occurs becauseContinue reading “Stratospheric wind and water vapour fluctuations on tidally locked exoplanets”

Turn off the stars: Image processing and astronomy

Picture a two-dimensional grid, like a chessboard or a piece of graph paper. Each square on the grid contains a tower of blocks. These towers come in different heights, ranging from zero to 255. “Towers” with zero blocks are black, towers with 255 blocks are white, and every number in between is a shade ofContinue reading “Turn off the stars: Image processing and astronomy”