Why were astronomers interested in studying radio waves in the 1980s and 1990s?

a) the radio waves were coming from the sun and heading to earth.
b) the radio waves were coming from the center of the milky way.
c) the radio waves were causing static on the transatlantic telephone service.
d) the radio waves were visible and could be seen in the sky above earth.

Astronomers were interested in studying radio waves in the 1980s and 1990's because the radio waves were coming from the center of the Milky Way.

Option B

Explanation:

The telescope displayed results of the waves in the form of bubbles which are said to be light years away from the earth. Although scientists were unable to explain the phenomenon they managed to name them based on their appearance with familiar objects.

In the period of 1980s and 1990's, astronomers were interested in studying the radio waves, especially the radio waves which were arriving from the centre of the milky way galaxy. This was found by using an electronic telescope.

b

Explanation:

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.