Introduction to the Hubble Space Telescope

HST is a space-based great observatory that observes at ultraviolet through near infrared wavelengths. High resolution imaging and wide-ranging spectroscopic capabilities enable forefront research across all domains of astrophysics. Time on HST is awarded through an open peer-reviewed competition.


The Hubble Space Telescope's launch in 1990 sped humanity to one of its greatest advances in that journey. Hubble is a telescope that orbits Earth. Its position above the atmosphere gives it a view of the universe that typically far surpasses that of ground-based telescopes.

In the years since launch, the Hubble Space Telescope continues its role at the forefront of astronomy, ranging from our own Solar System to the high-redshift universe.

Through the middle of the next decade, HST will remain the only space-based telescope providing spectroscopy and high-resolution imaging at UV, optical, and near-infrared wavelengths. With the launch of JWST in 2021, the bold science questions pursued with HST will be bolstered by the complementary capabilities of the two observatories.

part of HST's Legacy ExtraGalactic UV Survey (LEGUS)
NGC 3627, part of the Hubble Space Telescope's Legacy ExtraGalactic UV Survey (LEGUS), the sharpest, most comprehensive ultraviolet-light survey of star-forming galaxies in the nearby universe. The images are a blend of ultraviolet light and visible light from Hubble's Wide Field Camera 3 and Advanced Camera for Surveys.

HST For the Public

Using the Hubble Telescope

Observatory News


Press Releases

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Upcoming STScI Events

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  • The Milky Way Laboratory

    The Milky Way Laboratory
    28 Feb 2024

    Galaxy centers are the hubs of activity that drive galaxy evolution, from supermassive black holes to feedback from dense stellar clusters. While the bulk of our Milky Way Galaxy is...

  • The Total Solar Eclipse of April 2024

    The Total Solar Eclipse of April 2024
    5 Mar 2024

    Speakers: Michael Kirk (NASA Goddard Space Flight Center) and John Maple (Space Telescope Science Institute)

  • The Prevalence and Origin of the Alpha-Bimodality in the Local Group

    The Prevalence and Origin of the Alpha-Bimodality in the Local Group
    6 Mar 2024

    The recent era of large, ground-based abundance surveys has unraveled the chemical structures of our Milky Way galaxy. The most striking abundance feature is the alpha-abundance bimodality....


HST Help Desk 

Please contact the HST Help Desk with any questions.