Seeing ourselves

Supports 4 October 1957 launch, radio signals and rocket background.

Source relationship Mission retrospective based on established Soviet and Cold War records.

Supports Date, first artificial Earth satellite and US institutional response.

Source relationship A separately authored historical synthesis, hosted by NASA and sharing basic launch records.

Supports 12 April Vostok 1 human orbit and newspaper context.

Source relationship NASA historical caption, not original telemetry.

Supports Same-day launch, single orbit and subsequent public prominence.

Source relationship Another NASA retrospective sharing mission records, not an independent flight measurement.

Supports Anders attribution and historical date of 24 December 1968.

Source relationship Institutional catalogue of the mission photograph.

Supports Fourth orbit, black-and-white/colour sequence and 2013 reconstruction.

Source relationship Reconstruction uses the same mission imagery with lunar terrain and other data, not a second independent sighting.

Supports GMT event table for landing, first step and return.

Source relationship Institutional transcription of mission-event records.

Supports Crew roles, landing objective, sample collection and instruments.

Source relationship Later mission synthesis based on the same flight record.

Supports 7 December 1972, Apollo 17 and frame AS17-148-22727.

Source relationship Mission image catalogue and original caption; attribution kept to the crew.

Supports Distinguishes the 1972 photograph from 2000, 2002 and 2005 composite products.

Source relationship Later visualization history reuses the same photograph, not a separate exposure.

Supports 14 February 1990 capture and the 2020 reprocessing work.

Source relationship Mission retrospective draws on Voyager images and team records.

Supports Historical date and the reprocessed version’s reuse of the observation.

Source relationship Catalogue of the same mission image, not a second independent observation.

Supports The 1992 review reassesses design, safety culture, operational and regulatory factors.

Source relationship Experts reassess additional Soviet investigation material and revise an earlier account.

Supports Accident date, radioactive release, distinct exposed populations and health/displacement consequences.

Source relationship A separate expert assessment programme using partly shared accident and population data for different questions.

Supports 16 September 1987 adoption, phased controls, differentiated responsibilities and later fund.

Source relationship Implementing institution’s summary of the treaty framework.

Supports 1987 signing, 1989 entry into force and later Kigali amendment.

Source relationship Same UN treaty record, not independent ozone-recovery measurement.

Supports Attack sequence, intelligence-sharing and command/communication failures, with hindsight limits.

Source relationship 2004 official inquiry synthesizes interviews and documents within its remit and hindsight.

Supports Four aircraft, locations and al-Qaeda responsibility.

Source relationship Separately edited museum account drawing on shared event records and investigations.

Supports White House unveiling on 11 July 2022.

Source relationship Mission institution’s retrospective of the unveiling.

Supports Cluster lensing, near-infrared multi-filter composite and 12.5 hours of exposure.

Source relationship The same collaborative mission image; a different institution does not make an independent observation.

Supports 7 June exposure, 11 July release and filter-colour metadata.

Source relationship Catalogue of the same image product, adding capture and release dates.