In 1974 a Radio Signal Was Sent from the Arecibo

question 55

Multiple Choice

In 1974 a radio signal was sent from the Arecibo radio telescope toward the globular cluster M13, which is about 6.8 kpc distant. How long will it take this signal to reach M13?

• A) 6800 years
• B) 13,600 years
• C) 22,200 years
• D) 44,400 years

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Definitions:

Meningitis

An infection of the protective membranes covering the brain and spinal cord known as the meninges, potentially leading to brain damage or death if not treated promptly.

Encephalitis

An inflammation of the brain, often caused by an infection, that can lead to symptoms such as confusion, seizures, and fever.

Chronic alcoholism

A long-term, progressive disease characterized by an uncontrollable need to consume alcohol despite negative physical, social, and emotional consequences.

Collagen

A protein essential for supporting the structure of the skin, bones, tendons, and ligaments, and is the most abundant protein in mammals.