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A meteor streaked over a telescope — did the telescope actually 'see' it?
Space ScienceStandardAbout 2 min
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On 15 August 2026, over La Palma in Spain's Canary Islands, a Perseid meteor crossed the sky near the middle of the Milky Way. In the foreground stood LST-1, a prototype Large-Sized Telescope at the Observatorio del Roque de los Muchachos. The image was featured by NASA's Astronomy Picture of the Day on 26 September 2026.
The scene was captured photographically, and the caption was written by professional astronomers. They note that LST-1's mirror is 23 metres across, made of 198 hexagonal mirror segments, and fitted with a large, high-efficiency, pixelated camera. That night, some individual mirror segments also reflected the bright atmospheric flash of the Perseid meteor.
LST-1 is the first telescope built at the northern site of the Cherenkov Telescope Array Observatory. It is designed to detect extremely brief flashes of visible light in the atmosphere, lasting about a billionth of a second, triggered by high-energy gamma rays from distant sources such as active galaxies and gamma-ray bursts.
This image is not a research paper but a daily selected astronomy photograph with a caption. It introduces readers to LST-1's structure and observing goals, while showing the meteor and the Milky Way together. The meteor appearing in the same frame does not mean the telescope was built to observe that meteor.
The material does not explain any scientific link between the meteor, the Milky Way and LST-1's observations; it only describes what appears in the same scene, and provides no quantitative results or analysis.
Gamma rays are high-energy radiation from space that cannot reach the ground directly through the atmosphere. When they hit the atmosphere, they trigger a cascade of extremely brief, faint flashes of visible light. Cherenkov telescopes use large mirrors to collect these flashes and cameras to record them.
The meteor appearing in the same frame as the telescope does not mean the telescope was built to observe or detect that meteor.
LST-1's camera is pixelated and can record extremely brief flashes lasting about a billionth of a second.
This article was researched and written from the following materials:
Primary research: NASAOpen link
News report: NASA26 September 2026Read the original
AI editorial note: this article was rewritten by AI from the materials above and fact-checked. It is not a reproduction of the source article.
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