From the September 2010 issue

Does the Hubble Space Telescope actually take a number of sub-exposures and then stack them? If so, how long are typical sub-frames?

Jerry Wilson, Goleta, California
By | Published: September 27, 2010 | Last updated on May 18, 2023
30 Doradus
To create this image of 30 Doradus, a star-forming region in the Large Magellanic Cloud, astronomers with the Hubble Space Telescope stacked exposures taken through different filters. The data depict light captured through ultraviolet to visible and Hydrogen-alpha filters.
NASA/ESA/F. Paresce (INAF-IASF)/R. O’Connell (UVA)/Wide Field Camera 3 Science Oversight Committee

To assemble deep-field surveys, astronomers take many separate exposures with the Hubble Space Telescope that range from about 10 to 30 minutes in duration.