Telescope images are degraded by the blurring effects of the atmosphere and by light pollution

• Angular Resolution: A telescope’s angular resolution, which indicates ability to see fine details, is limited by two key factors

• Diffraction is an intrinsic property of light waves

• Its effects can be minimized by using a larger objective lens or mirror

• The blurring effects of atmospheric turbulence can be minimized by placing the telescope atop a tall mountain with very smooth air.

• They can be dramatically reduced by the use of adaptive optics and can be eliminated entirely by placing the telescope in orbit