From the first catalogued stars to journeys we have not yet made. Entries past the present are marked speculative: extrapolated, not recorded.
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c. 1600 BCE
Babylonian star catalogues
Enuma Anu Enlil records the motion of Venus over 21 years — the earliest sustained, systematic sky-watching we hold a record of.
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1608 – 1609
The telescope turns skyward
Lippershey files a patent for a spyglass; within a year Galileo points a refined version at Jupiter and finds it has moons of its own.
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1687
Principia
Newton describes gravitation as one law governing a falling apple and an orbiting Moon alike. The sky stops being separate physics.
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1957
Sputnik 1
First artificial object to orbit the Earth. Twenty–three days of beeping telemetry that opened the archive this terminal keeps.
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1969
Apollo 11
First crewed landing on another body. Two sets of footprints still on the Sea of Tranquility, undisturbed by wind that isn't there.
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1977
Voyager 1 & 2 launched
Each carries a gold–plated record of Earth sounds, greetings in fifty–five languages, and instructions no one has yet confirmed were read.
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1990
Hubble Space Telescope
A mirror above the atmosphere's distortion. Deep field exposures begin returning thousands of galaxies in single frames of black.
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2020s
The exoplanet survey era
Infrared observatories catalogue atmospheres of worlds we will never visit in person, only in spectra.
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c. 2150 — speculative
First generation ship departs
Extrapolated entry. A multi–generation vessel departs for Proxima Centauri b; arrival, if it happens, is not this terminal's problem.
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c. 2400 — speculative
First confirmed reply
Extrapolated entry. A signal returns from beyond the solar system, decoded generations after it was sent. Origin unconfirmed.