Practical astronomy projects for every level of expertise
Astrophotography can be quite unforgiving, exposing our cameras to conditions that push their design capabilities. One big issue is dirt, often in the form of dust, which builds up on the sensor from all those long nights outside in the elements. Cameras used for daytime landscape, portrait or traditional forms of photography spend their lives with camera lenses firmly secured to the front of the body, theoretically sealing the dust and general dirt out. Exposure times are usually
