Why Was the Globular Cluster M13 Selected as the Target

question 75

Multiple Choice

Why was the globular cluster M13 selected as the target for the 1974 Arecibo message?

• A) globular clusters are the most likely place to find stars with planetary systems
• B) stars in globular clusters are rich in heavy elements, the building blocks of life
• C) signals from advanced civilizations have previously been detected coming from this cluster
• D) globular clusters are densely packed with stars, hence maximizing the probability of interception by an advanced civilization

---

Definitions:

Ronald Reagan

The 40th President of the United States, serving from 1981 to 1989, noted for his conservative policies and role in ending the Cold War.

Gerald Ford

The 38th President of the United States, who assumed office following the resignation of Richard Nixon and is known for his efforts to heal the nation post-Watergate scandal.

Presidential Election

The process through which the president of a country or a head of state is elected, often involving a nationwide vote.

Iranian Hostages

refers to the 52 American diplomats and citizens held hostage for 444 days after a group of Iranian students supporting the Iranian Revolution took over the U.S. Embassy in Tehran in November 1979.