| Unexplained | UFO-001Project Blue Book: what the Air Force investigated, 1952–1969 | 1952–1969 · Wright-Patterson AFB, Ohio |
| Unexplained | UFO-007The 2004 Nimitz "Tic Tac" encounter: the public record | November 2004 · Pacific Ocean off Southern California |
| Unexplained | UFO-008The Condon Report and why the Air Force closed Blue Book | 1966–1969 · University of Colorado |
| Unexplained | UFO-015Ball lightning and other rare atmospheric lights | Centuries of reports · worldwide, often during storms |
| Open | UFO-002The 2021 ODNI UAP report, read line by line | 2004–2021 · U.S. military airspace |
| Open | UFO-003What AARO is and what its reports have concluded so far | 2022–present · Department of Defense |
| Open | UFO-004NASA's 2023 UAP study: what the panel recommended | 2022–2023 · NASA independent study |
| Open | UFO-006The Phoenix Lights, 1997: two events, one night | March 13, 1997 · Arizona |
| Explained | UFO-005Roswell, 1947: what the documents say happened | July 1947 · Roswell, New Mexico |
| Explained | UFO-009Is that a UFO or a Starlink train? How to tell | Since 2019 · Worldwide, around dusk and dawn |
| Explained | UFO-010Venus, Jupiter and the bright "lights" people report most | Any clear evening or pre-dawn sky |
| Explained | UFO-011Drones, balloons and lanterns: ruling out the usual suspects | Anywhere people fly things · day or night |
| Guide | UFO-012How to photograph something strange in the sky | Whenever it happens · wherever you are |
| Guide | UFO-014Reading the night sky: satellites, meteors and flares | Any clear night |
| Guide | UFO-016A skywatcher's starter kit for under $100 | Your backyard · any clear night |