I think the Arctic tundra is the coldest.
Answer:
I believe the answer is C. Spectroscope
Explanation:
"To study the atmospheres of other planets and their moons, earthbound astronomers use a set of techniques called spectroscopy. Light is collected by a telescope and split into its component wavelengths, creating a spectrum."
HIPWAC - NASAhttps://ssed.gsfc.nasa.gov › hipwac › howitworks
3 1/3 is the answer (you divide to find the answer)
