On this day in space! Aug. 10, 1972: A ‘Great Daylight Fireball’ lights up the sky over North America
AI-summarised brief · reviewed before publication
On August 10, 1972, a large fireball entered the atmosphere over Utah, traveling northward and exiting over Alberta after about 100 seconds. The object, estimated at 10 to 45 feet in diameter, was likely an icy comet fragment or rocky asteroid. It passed entirely through the sky without impacting the ground, creating a bright daylight spectacle visible across North America. The event was recorded by observers and remains the only documented daytime fireball of such magnitude in the United States.
💡 Why It Matters
- · The 1972 fireball demonstrated that sizable extraterrestrial bodies can traverse Earth’s atmosphere without collision, offering a rare opportunity to study atmospheric entry dynamics and potential hazards.