In Order to Observe Gamma Rays from Space, Astronomers Must

Multiple Choice

In order to observe gamma rays from space, astronomers must first

A) observe gamma rays, as they are still theoretical.
B) place a gamma ray telescope above Earth's atmosphere.
C) place a gamma ray filter on a visible light telescope.
D) build a very large diffraction grating.
E) build a very small telescope in order to detect such small wavelengths.