Follow these tips for cleaning the different parts of your camera lens, without risking damage.
To understand how stars form, astronomers need to watch the process play out in galaxies. That simple fact is behind PHANGS, the Physics at High Angular resolution in Nearby GalaxieS survey. It's a large-scale, multiwavelength, multitelescope survey of dozens of nearby spiral galaxies. Its targets are galaxies close enough that star-forming features like giant molecular clouds (GMCs), HII regions, and stellar clusters can be resolved.

