Philosophical Transactions

Four witnesses including Royal Academy co-founders Thomas and Paul Sandby watching from the Windsor Castle terrace as a brilliant pale blue luminous sphere halted beneath an oblong cloud and lit everything on the ground with prodigious light before moving east and changing direction on August 18 1783 — as published in the Philosophical Transactions of the Royal Society 1784 and documented in the surviving Sandby aquatint

12 minutes read

England Sightings

1783: Luminous UFO seen from Windsor Castle

Published: April 8, 2013 | Updated: May 18, 2026

THINK ABOUTIT UFO|UAP SIGHTING REPORT 1783: Luminous UFO seen from Windsor Castle At 9:45 PM on August 18, 1783, four witnesses stood on the terrace...

Read the File

Split scene showing Spanish palace guard Gil Pérez leaning against Manila palace wall at night in 1593 on the left and the same soldier appearing in confused amazement in Mexico City's Plaza Mayor on the right — the 9,000 mile teleportation case documented by Antonio de Morga

9 minutes read

Mexico Sightings

1593: Gil Pérez’s 9,000 mile Instant Trip

Published: May 13, 2026 | Updated: May 13, 2026

Contact Think-Aboutit - Independent UFO Research Terminal 2026

1 minute read

Site

Contact Terminal

Published: March 6, 2026 | Updated: March 6, 2026

12 minutes read

Texas Sightings

2009: Arlington Texas Midnight Military Sighting

Published: February 4, 2026 | Updated: April 18, 2026

Illustration of a bright white orb and a red octopus-shaped entity with glowing points on its legs hovering over a rocky bay at night.

26 minutes read

Utah Sightings

2023: Lake Powell UAP: Detailed Account of Orbs and “Octopus” Entities

Published: January 27, 2026 | Updated: January 28, 2026

1783: Luminous UFO seen from Windsor Castle

From the Archive

1593: Gil Pérez’s 9,000 mile Instant Trip

Contact Terminal

2009: Arlington Texas Midnight Military Sighting

2023: Lake Powell UAP: Detailed Account of Orbs and “Octopus” Entities