#2991: Beamsplitters explain

[Cross section of a telescope with some parts of the image darkened to represent the path of light, with portions where the light would be more concentrated being darker]

[Labels with arrows as they appear left to right, top to bottom:]

Incoming Light

Primary Mirror

Secondary Mirror

Beamsplitter

Sensor

Secret Solar Panel

Power Sold To Grid

[Caption below the panel:]

Astronomy News: The International Astronomical Union has finally banned beamsplitters, optical devices used by scientists to embezzle light from their instruments.