What do astronomers study and what tool are used

Astronomy is the science of the study of planets stars and other extraterrestrial body's in outer space they will often use things like telescopes and electronic equipment as like but can use the hubble telescope as well

According to NASA, modern astronomers’ tools include advanced telescopes capable of studying light reflected from the sun, moon, planets, comets and stars. Radio telescopes are utilized in the study of radio waves, while space-borne gamma ray telescopes aid in the study of gamma rays.

answer; /// i believe its(c) policymakers prioritize the various problems facing the state;

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this