Telescopes

Galileo's Telescope (Refracting Type - See Below)	Newton's Telescope (Reflecting Type - See Below)

Different Categories of Telescopes: Based on The Electromagnetic Spectrum

Optical Telescopes: Focusing of Light

Refracting Type - Causes Distortions (Galileo)	Reflecting Type - Reduces Distortions (Newton)

Radio Telescope: The Very Large Array Near Magdalena, New Mexico

The Very Large Array, one of the world's premier astronomical radio observatories, consists of 27 radio antennas in a Y-shaped configuration on the Plains of San Agustin fifty miles west of Socorro, New Mexico.

Each antenna is 25 meters (82 feet) in diameter.

The data from the antennas is combined electronically to give the resolution of an antenna 36km (22 miles) across, with the sensitivity of a dish 130 meters (422 feet) in diameter.