Hubble Space Telescope

(Last edited: Thursday, 31 August 2023, 5:17 PM)

Short Definition
Hubble Space Telescope is a large telescope used to observe distant space objects. Hubble can observe almost complete light spectrum from the ultraviolet to near infrared light allowing extensive research of space. Its research includes but is not limited to beginning of the Universe, black holes, exoplanets and nebulas.

Detailed Definition

Hubble is a Cassegrain mirror telescope. It is built with two hyperbolically curved mirrors that are positioned facing each other. The main mirror that accumulates the light from celestial bodies is curved inwardly and leads light to the secondary smaller mirror. Second mirror is curved outwardly and diffuses the light bouncing it back to the first mirror. At the main mirror the light is finally collected together and lead to the focal point where optical instruments can gather the data.

Hubble was launched in 1990 and has been visited multiple times between 1993 and 2009 by astronauts. Those missions included various repairs like correcting mistakes that were noticed first after we started collecting the data and adding new science instruments to make information analysis easier.

Hubble studies helped us understand our Universe better being the first telescope located outside of Earth's atmosphere that prevented us from research of ultraviolet light that is only visible in space. One of the most important discoveries that Hubble made include:
-More accurate estimate on age of the Universe,
-Determining the rate with which the Universe is expanding,
-Discovering that almost every big Galaxy has a black hole at its center.


Hubble Space Telescope is named after Edwin Powell Hubble, who made one of the most important discoveries in the field of astronomy in the 20th century.

Sample Sentence(s):

Hubble Space Telescope helped researchers make new discoveries.

Astronomers around the world use Hubble Space Telescope to research new exoplanets.

Translations of Terms/Concepts into Partner Languages:

French: Hubble

German: Hubble-Weltraumteleskop

Italian: telescopio spaziale Hubble

Polish: Kosmiczny Teleskop Hubble’a

Swedish: Hubbleteleskopet

Links to Videos/Articles:

  • Space Telescope Science Institute (n.d.), Hubblesite, Retrieved from Website

  • Garner, R. (2017, December), Observatory – Optics, Retrieved from

  • Royal Museum Greenwich (n.d.), What has the Hubble Space Telescope Discovered?, Retrieved from

  • NASA, ESA (2000, January), Hubble Space Telescope, SM3A, Retrieved from

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