Interstellar messages

American astrophysicist, cosmologist and author (1934–1996)

life that does not originate from Earth

apparent contradiction between the lack of evidence and high probability estimates for the existence of extraterrestrial civilizations

effort to find civilizations not from Earth

probabilistic argument to estimate the number of alien civilizations in our galaxy

two phonograph records included on both Voyager spaceprobes launched in August and September 1977

American astronomer and astrophysicist (1930–2022)

1974 message into space

plaque attached to the Pioneer 10 and Pioneer 11 spacecraft in case extraterrestrial life finds them

cache of goods or data secured for some time to be opened at a date in the future

Soviet and Russian astronomer

Soviet astronomer (1916–1985)

American author and producer

form of communication

constructed language

Dutch mathematician (1905–1990)

set of programs to search for and communicate with extraterrestrial intelligence

attempt to send messages to intelligent extraterrestrials

initiative to search for intelligent extraterrestrial life

proposed SETI measurement

Russian astronomer

communication between planetary systems

American artist and writer (1940–2023)

hypothetical autonomous artificially intelligent robotic interstellar probe seeking technological civilizations and communicate over short distances once it discovers one

radio message broadcast to Venus in 1962

interstellar radio messages

British physicist

American artist and journalist

overview about the communication with extraterrestrial intelligence

interstellar radio message (IRM)

series of interstellar radio transmissions