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Category Shape / form From year To year Country Time of day Witnesses Evidence Status Duration Sound Colour Motion Lights Sources include Min photos Min videos Min sources Min score Sort order

3D model Narrated

“Lowell Observatory”

Stories2

Seymour Hess sighting at Lowell Observatory, Flagstaff, 1950

May 20, 1950 · Lowell Observatory, Mars Hill, Flagstaff, Coconino County, Arizona

UAP · Sphere · 15 sources

21Thinly documented

Seymour L. Hess's Flagstaff Disk Sighting

May 20, 1950 · Lowell Observatory, Mars Hill, Flagstaff, Coconino County, Arizona

UAP · Disc / saucer · 13 sources

16Thinly documented

Names1

Loren E. Gross Person · 4 stories
Loren E.

Documents10 · see all

Project Blue Book Socorro file Document

Internet Archive· 168 pages

…On Lowell School Ground She said she gazed at a UFO for five or 10 minutes shortly before…
Project Blue Book Socorro file Document

The Black Vault· 167 pages

…On Lowell School Ground She said she gazed at a UFO for five or 10 minutes shortly before…
Project Blue Book Socorro file (direct PDF) Document

Wikimedia Commons (USAF Project Blue Book)· 168 pages

…On Lowell School Ground She said she gazed at a UFO for five or 10 minutes shortly before…
proj b1 FOIA release

Office of the Secretary of Defense· 12 pages· 1 page mentions it
- p. 7 …SKY & TELESCOPE, by Sky Publishing Corporation, Harvard College Observatory, Cambridge, Mass. 02138. Monthly Magazine, 60 cents per copy. WEATHER ELEMENTS…
Unidentified flying objects: hearing before the Committee on Armed Forces of the House of Representatives, Eighty-ninth Congress, second session, April 5, 1966 ... Hearing transcript

U.S. House Committee on Armed Services· 1966-04-05· 88 pages· 1 page mentions it
- p. 12 …C., published by Lowell Observatory. "Anatomy of a Phenomenon," by Valle, Jacques. "First Man to the Moon," by Von Braun…
The National Investigations Committee on Aerial Phenomena (Nicap) FOIA release

Central Intelligence Agency· 2001-03-12· 186 pages· 3 pages mention it
- p. 12 …May 20,1950 from the grounds of the Lowell Observatory. It was moving from the South-east to the Northwest…
- p. 21 …On the grounds of Lowell Observatory, Arizona, May 20, 1950, Dr. Seymour L. Hess, now head of the Department of…

All 10 documents →