Historic Moment for Irish Astronomy
An astronomer in Armagh has captured what experts believe is the first video recording of a lunar impact flash on the island of Ireland. Armagh Observatory and Planetarium confirmed the discovery and called it a rare scientific moment.
Andrew Marshall Lee, a final-year PhD student, recorded the footage using the Armagh Robotic Telescope. He observed the flash on Friday and described the experience as unforgettable.
According to the observatory, this recording marks only the second confirmed capture of a lunar impact flash in the United Kingdom.
Seeing the Flash Live
Lunar impact flashes appear when small objects strike the Moon at extreme speed. These events usually last less than a second, which makes them difficult to detect.
Astronomers normally record hours of footage and rely on software to flag any sudden changes. In this case, Marshall Lee happened to watch the screen at the exact moment of impact.
He said the timing came down to pure luck. Watching the flash happen live made the moment deeply personal and memorable.
What Causes a Lunar Impact Flash
Small pieces of space debris often cause these flashes. Most measure smaller than a golf ball and remain invisible while travelling through space.
When one of these objects hits the Moon, it travels at enormous speed. The impact converts kinetic energy into heat and light. This reaction briefly vaporises surface material and creates a visible flash that observers can see from Earth.
Armagh Observatory estimates the object involved in this event travelled at around thirty-five kilometres per second.
Link to the Geminid Meteor Shower
Marshall Lee recorded the impact during the peak of the Geminid meteor shower. Scientists believe this shower likely produced the object that struck the Moon.
Meteor showers occur when Earth and the Moon pass through streams of debris left by comets or asteroids. These conditions increase the chances of detecting lunar impact flashes.
The observatory plans to continue studying the event to confirm the object’s exact origin. A video of the flash is now available on the observatory’s website.
Why This Discovery Matters
Lunar impact flashes help scientists understand how often space debris strikes the Moon. These events also offer insight into the impact of physics and surface processes on airless bodies.
Capturing one on video strengthens research efforts and adds valuable data to a limited global record.
For Marshall Lee, the discovery represents a career-defining moment. For scientists, it marks a rare and exciting contribution to lunar observation.
