<u>Answer:</u>
The astronomers predicted fireworks from the rare stellar encounter in the year 2018. Stellar collision can be defined as when two stars which are in the same group of the stars due to the radiations emitted by the gravity or may be because of some other reason.
The importance of this encounter to the astronomers was that this can describe the huge population of millisecond pulsars and can also be used to develop the exotica of the stars.
The correct answer is - by blockading the island with aircraft carriers.
After Castro came to power in Cuba, he immediately made an alliance with the Soviet Union. That was a devastating news for the United States, as that meant that their arch rival will be able to make its basis right next door to their territory.
The United States responded by blocking the island as much as possible, by using numerous aircraft carriers that circled around the island, they were trying to threaten them, and also to be able to block or to respond quickly to any attack from Cuban territory.
