User:Sabina parajuli

launch date (1990) Hubble's Name NASA named the world's first large, space-based optical telescope after American astronomer Edwin P. Hubble (1889—1953). Dr. Hubble confirmed an "expanding" universe, which provided the foundation for the Big Bang theory. Mission Launch: April 24, 1990, from space shuttle Discovery (STS-31) Deployment: April 25, 1990 First Image: May 20, 1990: Star Cluster NGC 3532 Servicing Mission 1: December 1993 Servicing Mission 2: February 1997 Servicing Mission 3A: December 1999 Servicing Mission 3B: February 2002 Servicing Mission 4: May 2009 Size Length: 43.5 ft (13.2 m) Weight: At Launch: ~24,500 lb (11,110 kg) Post SM4: ~27,000 lb (~12,247 kg) Maximum Diameter: 14 ft (4.2 m) Spaceflight Statistics Low Earth Orbit: Altitude of 340 miles (295 nautical miles, or 547 km), inclined 28.5 degrees to the equator Time to Complete One Orbit: ~95 minutes Speed: ~17,000 mph (27,300 kph) Optical Capabilities Sensitivity to Light: Ultraviolet through infrared (115—2500 nanometers) Data Statistics Hubble transmits about 140 gigabits of raw science data every week. Power Needs Energy Source: The Sun Mechanism: Two 25-foot solar panels Power generation (in sunlight): ~5,500 watts Power usage (average): ~2,100 watts Pointing Accuracy In order to take images of distant, faint objects, Hubble must be extremely steady and accurate. The telescope is able to lock onto a target without deviating more than 7/1000th of an arcsecond, or about the width of a human hair seen at a distance of 1 mile. Hubble's Mirrors Primary Mirror Diameter: 94.5 in (2.4 m) Primary Mirror Weight: 1,825 lb (828 kg) Secondary Mirror Diameter: 12 in (0.3 m) Secondary Mirror Weight: 27.4 lb (12.3 kg) Power Storage Batteries: 6 nickel-hydrogen (NiH) Storage Capacity: Equal to 20 car batteries