this post was submitted on 19 Mar 2025
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Just to add to this, air at different temperatures and moisture levels bends light to different degrees, which is why the layers and pockets of air that form our atmosphere make stars shimmer. It’s partially why astronomers are so eager to get telescopes into space (like Hubble and the James Webb), since the lack of this effect lets them resolve much smaller light sources than you could hope to beneath the atmosphere.