Kepler Stares at Neptune

Since 2014, the Kepler telescope has observed superior planets like Neptune, capturing images of its moons Triton and Nereid. The apparent retrograde motion of Neptune is due to Kepler's faster orbit. Originally designed to find exoplanets using the transit method, Kepler measures dips in starlight to detect planets. During Neptune observations, it focused on changes in reflected sunlight, revealing Neptune's dynamics and laying groundwork for future exoplanet studies.

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