How is Roman's field of view 100 times bigger than Hubble's?! #shorts

By Dr. Becky

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So Roman and Hubble are same size telescope, but vastly different fields of view - how does that work? If you haven’t heard of Roman, it’s NASA’s next flagship observatory, and it’s set to launch Sunday 30th August 2026. It’s named after Nancy Grace Roman, who was the chief of astronomy at NASA during the 70s where she pioneered the design and development of Hubble. So a fitting name for the Hubble telescope’s successor. Roman is the same size as Hubble, so the mirror that collects the light is the same width, and will give us the same level of detail in images, but it’s also been designed to look at a much bigger area of sky in a single observation: its field of view is a hundred times bigger than Hubble’s! So while all the images taken by Hubble in its 36 year lifetime have only covered less than 1% of the entire sky, Roman will cover 12% of the sky in just 17 months, a feat that would’ve taken Hubble 1700 years. But if the two telescopes have the same size mirror, how then do

Tags: dr beccy, astronomie, physiks