3 Messages We've Sent to Extraterrestrials

In the 1970s, Frank Drake and Carl Sagan initiated projects to send messages into space, hoping to communicate with extraterrestrial life. They created plaques for the Pioneer 10 and 11 missions, which included scientific diagrams and a pulsar map. Later, the Voyager probes carried the Golden Records, featuring sounds and images from Earth. Additionally, the Arecibo message was sent via radio waves, encoded in binary. Despite the low chances of these messages being received, they represent humanity's attempt to reach out to the cosmos and reflect on our existence.

Who were the astronomers involved in creating messages for extraterrestrial life in the 1970s?

• Frank Drake and Carl Sagan

• Neil Armstrong and Buzz Aldrin

• Isaac Newton and Albert Einstein

• Edwin Hubble and Stephen Hawking

What scientific concept was used on the Pioneer plaques to describe length?

• The speed of light

• The gravitational constant

• The distance from Earth to the Sun

• The energy change in a hydrogen atom

What was the purpose of the pulsar map included on the Pioneer plaques?

• To show the location of the Sun

• To indicate Earth's position in the galaxy

• To illustrate the concept of time

• To display the trajectory of the spacecraft

What unique feature did the Voyager Golden Record have compared to the Pioneer plaques?

• It contained a detailed history of Earth

• It included a map of the Milky Way

• It was designed to be played like a vinyl record

• It was made of gold-plated copper

What type of sounds were included on the Voyager Golden Record?

• Sounds of space phenomena

• Recordings of famous speeches

• Sounds of nature and greetings in multiple languages

• Only classical music

What was the Arecibo message primarily composed of?

• Mathematical equations

• Binary-encoded radio frequencies

• Visual images

• Audio recordings

Why is it unlikely that the Arecibo message will receive a response?

• The message was not powerful enough

• It was sent to a distant galaxy

• The message was too complex

• The target cluster will have moved in its orbit