The science behind all those pretty pictures.
Since its launch in 1990, the Hubble Space Telescope has made more than one million observations of the cosmos, broadening humanity's knowledge of the cosmos almost immeasurably.doesn't see the universe as we do. The telescope views the cosmos across a broad range of light wavelengths, some of which our eyes are incapable of seeing.
Working in unison, the Advanced Camera for Surveys and the Wide Field Camera 3 are able to provide astronomers with wide-field imaging over a broad range of wavelengths. Both camera systems were installed on Hubble by spacewalking astronauts after the observatory's April 1990 launch aboard theACS joined Hubble in 2002 and was designed primarily for wide-field imagery in visible wavelengths.
Hubble had cameras prior to the installation of these instruments, of course. The space telescope's previous cameras include the Wide Field and Planetary Camera, the Wide Field and Planetary Camera 2, the High-Speed Photometer and the Faint Object Camera. Hubble's cameras can see the universe from the infrared region of the electromagnetic spectrum through visible light wavelengths all the way up to ultraviolet light.
While the STIS spectrometer works with a broad range of wavelengths, COS focuses exclusively on ultraviolet light and is considered the most sensitive ultraviolet spectrograph ever built. Hubble's ability to study such stretched light from early stars has allowed scientists to better constrain the, to around 13.8 billion years. The capability to see early galaxies and stars has also massively increased our understanding of how the universe has evolved since its early epochs.
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