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nasa's nancy grace roman space telescope

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is designed to answer big questions

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about the universe

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what is dark energy which seems to be

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speeding up the expansion of the

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universe

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how many planets exist among the stars

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and what are they like

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the roman space telescope is similar to

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hubble but benefits from 30 years of

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technological development

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it will view the sky on a scale never

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before accomplished from space

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this is where roman is closest to hubble

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it has the same size and type of main

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mirror a 2.4 meter precisely shaped

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piece of silver-coated glass

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the size of this mirror is partly how

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roman's main camera is the wide field

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instrument which will take infrared

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pictures of the sky to study dark energy

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observe galaxies and stars and find

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exoplanets

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instead of hubble's single first

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generation image sensor the wfi

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incorporates 18 third generation chips

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that allow it to take pictures capturing

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100 times greater sky area than hubble's

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each 300 megapixel image will enable

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scientists to study a large portion of

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the sky

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at roman's back is its primary means of

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communication with earth the high gain

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antenna

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sending nearly 1.4 terabytes of data to

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ground stations every day that's the

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equivalent of 460 hours of streaming

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video

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roman's critical systems such as power

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and data handling are located in six

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modules at the spacecraft's rear these

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include six rotating reaction wheels

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that control where the spacecraft points

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nearly one ton of propellant for larger

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movements and a 10 terabyte data

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roman's other instrument is its

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coronagraph technology demonstration

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a coronagraph blocks a star's light to

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capture the faint light from orbiting

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planets

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it will be the first time a space

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telescope has used deformable mirrors to

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precisely control the incoming light and

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special masks to block only the

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starlight

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this method will enable roman to capture

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direct images of distant planets and

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even analyze the light that is reflected

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off their surfaces allowing scientists

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to learn about their composition and

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the spacecraft's solar panels provide

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its power by converting sunlight into

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electricity

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they also shade the spacecraft helping

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to keep its instruments at their design

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temperatures

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the solar panels will be able to provide

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4100 watts of power

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enough to run two commercial microwave

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ovens

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with all these systems working together

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and in partnership with powerful future

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telescopes the nancy grace roman space

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telescope will be able to usher in a new