ABCD
Brightness

[[The panel is white ink on a black background. A character is staring at the ground.]]
Character: Based on this decrease in the star's brightness, I believe it is orbited by at least one planet.
Exoplanet astronomers at night
{{Title text: Recently, some exoplanet astronomers have managed to use careful analysis of reflected light to discover Earth during the day.}}
Recently, some exoplanet astronomers have managed to use careful analysis of reflected light to discover Earth during the day.