PhoSim simulates the atmosphere, including air turbulence, as well as distortions from the shape of the telescope’s mirrors and the electrical properties of the sensors. The photons are propagated ...

From a Mars rover selfie to an astronaut's view of the flower moon, these space images will give you a new perspective on our ...

If city lights block the stars over your backyard, this map can help you hunt down the darkest skies for epic stargazing.