Aliases
Disambiguation
NOT an official government classification. Term describes hypothetical craft or objects presumed to originate from other planets. Should not be confused with IFO (Identified Flying Objects) or official UAP/UFO taxonomy. Used descriptively in UFO/UAP literature to denote interplanetary origin hypothesis.
Stats
Concept
Hypothetical or theorized unidentified aerial objects presumed to originate from planets other than Earth; a descriptive category within extraterrestrial UFO hypothesis discourse rather than an official government classification.
Objetos aéreos não identificados hipotéticos ou teoricamente presumidos como originários de planetas diferentes da Terra; uma categoria descritiva dentro do discurso da hipótese UFO extraterrestre, e não uma classificação oficial do governo.
Enrichment
- Unidentified flying objectWikipedia▎ high· 2026-05-14
- UFO coined by USAF Captain Edward J. Ruppelt
- UAP first appeared in late 1960s, increased usage in 21st century
- Project Blue Book investigated 12,618 sightings (1952–1969); 701 remained unidentified
- Term 'flying saucer' emerged from 1947 Kenneth Arnold sighting
- The Army's Counter Intelligence Corps and UFOs: The Secret History of America's First UFO Investigators3i Atlas▎ medium· 2026-05-14
- Project Sign produced report in summer 1948 speculating about 'interplanetary' craft
- Air Force leadership rejected and destroyed report without evidence
- Army counterintelligence unit may have handled 'interplanetary phenomena' in late 1940s–1950s
- Records transferred to Air Force OSI in conjunction with Operation Blue Book
- CIA's Role in the Study of UFOs, 1947–90Federation of American Scientists▎ high· 2026-05-14
- Project SIGN, GRUDGE, and BLUE BOOK were primary Air Force UFO investigation programs
- No official evidence presented for extraterrestrial or interplanetary origins
- Robertson Panel concluded no evidence that objects sighted might be extraterrestrials
- Official terminology was UFO and flying saucer, not 'interplanetary' classification
INTERPLANETARY FLYING OBJECTS
Description (EN)
Low-signal entity — referenced 6 time(s) across 2 document(s). No external enrichment performed (criteria: ≥3 mentions). Use the page references below for raw context.
Descrição (PT-BR)
Entidade de baixo sinal — referenciada 6 vez(es) em 2 documento(s). Sem enriquecimento externo (critério: ≥3 menções). Use as referências de páginas abaixo para contexto bruto.