The first astronomical radio source ever observed was:
A) the Andromeda Galaxy
B) the galactic center, in the constellation Sagittarius
C) thunderstorms
D) the Earth
E) Jupiter

Question

Quizplus · Accepted Answer

The galactic center, located in the constellation Sagittarius, was the first astronomical radio source ever observed in the 1930s by Karl Jansky. He was studying radio waves emitted by thunderstorms when he noticed a strong radio signal coming from the center of the Milky Way galaxy, leading to the discovery of this new field of astronomy.

The First Astronomical Radio Source Ever Observed Was