Radian is the SI unit to measure the angle subtended by an arc of a circle. It is the measurement of the angle subtended by an arc of a circle whose length is equal to the radius of the circle.

Astronomers Discover Exotic Atmosphere on Scorching Exoplanet LTT 9779 b
Astronomers discover a fascinating atmosphere on exoplanet LTT 9779 b a scorching Neptune-sized planet. Learn about the findings from the James Webb Space Telescope.
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