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Hubble Finds a Field of Stars [1]
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Date: 2024-03
A common misconception is that Hubble and other large telescopes observe wildly differently sized celestial objects by zooming in on them, as one would with a specialized camera here on Earth. While small telescopes might have the option to zoom in and out to a certain extent, large telescopes do not. Each telescope’s instrument has a fixed ‘field of view’ (the size of the region of sky that it can observe in a single observation). For example, the ultraviolet/visible light channel of Hubble’s Wide Field Camera 3 (WFC3), the channel and instrument that collected the data used in this image, has a field of view roughly one twelfth the diameter of the Moon as seen from Earth. When WFC3 makes an observation, its field of view is the size of the region of sky that it can observe.
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[1] Url:
https://science.nasa.gov/missions/hubble/hubble-finds-a-field-of-stars/
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