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:

1920 census

2010 census

1- in bradbury's  fahrenheit 451, all books are banned and burned upon discovery. in the nazi germany, books considered to be subversive to the regime would be burned to keep the population from generating ideologies that could challenge nazism.

2- was bradbury correct in his literal interpretation of  “where they burn books, they will also ultimately burn people.”? in some way, yes. when knowledge is not only limited, but also controlled, the people tied to it are led to their demise. just like in the novel, people in nazi germany who owned  subversive books were punished not only by the burning of their property, but also by the discrimination that followed after such a public form of consequence. if a person was seen being confiscated  subversive  books, they may be considered as an ally to the jews, which meant pretty much the same as being the enemy back then. because of the extreme exclusion and suffering that followed this punishment, it's almost like dying a slow death.

in this way, the phrase  “where they burn books, they will also ultimately burn people.” is both literal and figurative.

explanation:

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