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Hubble features a 2.4 m (7 ft 10 in) mirror, and its five main instruments observe in the ultraviolet, visible, and near-infrared regions of the electromagnetic spectrum.
The Hubble Space Telescope’s mirror-based optical system collects and focuses light from the universe to be analyzed by science and guidance instruments. The optical system, called the Optical Telescope Assembly (OTA), gives Hubble a unique view of the universe by gathering infrared, visible and ultraviolet light.
Learn about Hubble’s great discoveries, understand the basics behind Hubble’s scientific capabilities, and explore its incredible images of the cosmos. Learn More Abell 370 is a massive galaxy cluster whose immense gravity distorts and magnifies the light of galaxies behind it.
Hubble is a Cassegrain reflector telescope. Light from celestial objects travels down a tube, is collected by a bowl-like, inwardly curved primary mirror and reflected toward a smaller, dome-shaped, outwardly curved secondary mirror.
Discovery, Hubble is currently located about 340 miles above Earth’s surface where it completes 15 orbits per day—approximately one every 95 minutes. The satellite moves at the speed of about 5 miles (8 km) per second, fast enough to travel across the United States in about 10 minutes. The Telescope Hubble is classified as a Cassegrain ...
Hubble was designed to hold six science instruments, each observing the universe in a unique way. The telescope has cameras, which capture Hubble's famed images, and spectrographs, which break light into colors for analysis. The current suite of instruments is listed below.
Hubble is 43.5 feet long (13.2 m) and 14 feet wide (4.2 m) at the back, where the scientific instruments are housed. Weighing about 27,000 pounds (12,246 kg), the telescope is approximately the same size and weight as a school bus.
As of spring 2018, the Hubble Space Telescope has made over 1.5 million observations of more than 43 500 celestial objects. The 28 years’ worth of observations has produced more than 153 terabytes of data and, the orbiting observatory generates more than 80 gigabytes of data each month.
The optical telescope assembly of the Hubble Space Telescope consists of two mirrors, support trusses and the focal plane structure. The interactive page highlights the optical assembly of Hubble.
The Hubble Space Telescope is the visible/ultraviolet/near-infrared element of the Great Observatories astronomical program. The spacecraft provides an order of magnitude better resolution than is capable from ground-based telescopes.