The Hubble Space Telescope (HST) is the space telescope launched into Earth’s orbit in 1990, built by NASA (United States Space Agency) with contributions from ESA (European Space Agency).
Hubble is the only Telescope designed to service in Space by the Astronomers which remains in operation from 1990.
The telescope has 2-4 meter mirror, with four main instruments, one observes near ultraviolet, visible and near infrared spectra.
The telescope is so named after the astronomer Edwin Hubble.
Though this is not the first telescope, Hubble is one of the largest and most versatile one and used as a vital research tool.
The significant reason for the invention of this HST is because ground based telescopes were limited to smaller resolutions such as 0.5-1.0 arc seconds.
This HST is designed based on angular resolution technology (the smallest separation at which objects are clearly distinguished) which are limited by diffraction and could observe both infrared and ultraviolet light.
The space-based astronomy was started initially after World War II.
Meanwhile NASA has developed firm plans for a space based reflecting telescope with a mirror 3m in diameter which is known as the Large Orbiting Telescope or Large Space Telescope (LOT/LST).
But the plans required manned maintenance mission to ensure such costly program and lengthy working life. Steps are ahead to make the plan available with this reusable space shuttle soon and thus could be among one of the Latest Electronic Technology.