Which type of wave astronomers to determine the hottest stars?

Explanation:

In the electromagnetic spectrum are plenty of different waves that change their properties according with their length, energy, frequency. In this case, the hottest stars are the blue ones, because this means that they are spreading waves with a major frequency and, for instance, major energy, which means major hot.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.