Hubble Telescope, World’s first optical telescope that was launched into low Earth orbit in 1990, and remains in operation. With a 2.4-meter mirror, Hubble’s four main instruments observe in the near ultraviolet, visible, and near infrared spectra. It is powered by Sun and its electricity is stored in six nickel – hydrogen batteries, equivalent to 20 car batteries.
It doesn’t travel to faraway stars but instead snaps incredible pictures of them .It is named after Edwin P Hubble who discovered many galaxies in the universe. At 43.5 ft long and with a diameter of about 14ft, Hubble Telescope equals the size of a bus.
One of the best known images is of the vast Carina Nebula, an interstellar cloud of dust, hydrogen gas, helium gas and plasma that lies some 6500 light years away from Earth. Below are the important statistics related to Hubble Telescope.
Launch date: April 24, 1990
Orbit height: 559 km
Speed on orbit: 7.5 km/s
Power: 2,800 watts
Source: Wikipedia, hubblesite,org