Superbright comet and fireball create a perfect X over European castle, a celestial sight that few have witnessed in history!

Written by Fabio Lucas Carvalho

Published on 24/04/2026 at 17:31

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The visual encounter between the comet Tsuchinshan-ATLAS and a bright fireball defies mathematical odds and delights astronomers worldwide.

A rare visual configuration astronomical event was recently captured over the Castle of Lousa, in Portugal, where a bright comet and a meteor crossed paths to form an “X” astronomical.

The record, made by photographer Miguel Marques, shows the comet C/2023 A3 Tsuchinshan-ATLAS in visual conjunction with a fireball (meteor) that exploded exactly at the moment of capture. Experts point out that the probability of these two independent events occurring simultaneously at the same point in the sky is extremely low.

The encounter between Tsuchinshan-ATLAS and the fireball

The comet C/2023 A3, known as Tsuchinshan-ATLAS, was at its peak visibility phase for ground observers when the record was made.

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While the photographer was preparing the equipment to capture the long and bright tail of the celestial body, a large meteor crossed the horizon perpendicularly to the comet’s trajectory. The result was the formation of an “X” astronomical light, composed of an object traveling thousands of kilometers from the Sun and another that disintegrated in the Earth’s atmosphere.

Unlike the comet, which moves slowly relative to the background stars, the meteor was an ephemeral event that lasted only a few seconds. The fireball was technically a meteor “exploding,” characterized by an intense brightness that temporarily outshone the surrounding lights.

The precise timing required to capture the “X” astronomical demanded that the photographer had the camera shutter open at the exact moment the space fragment ignited.

Analysis of the odds and uniqueness of the record

Astronomers highlight that, although comets and meteors are common, the perfect overlap between them is a statistical challenge. The Tsuchinshan-ATLAS is a rare visitor of the inner solar system, and its close passage to Earth occurs at intervals of thousands of years.

The coincidence of a fireball crossing its trail exactly above a historical monument, forming the “X” astronomical, makes the image one of the most peculiar documentations of this astronomical cycle.

The captured fireball likely belongs to one of the smaller meteor showers active during the period, or it was a sporadic meteor with no defined orbit. The fact that the meteor exploded, creating a significant flash, added a layer of visual complexity to the composition of the “X” astronomical. Deep-sky photography experts claim that the chances of aligning these two phenomena with such symmetry are comparable to “winning the astronomical lottery.”

The historical scenario and the legacy of the image

The Castle of Lousa served as a terrestrial frame for the event, providing a contrast between secular human architecture and the vastness of space.

The geographical location in Portugal favored the visibility of the comet due to clear skies and low light pollution in the region at the time of the photo. The record of the “X” astronomical quickly gained international attention for its unique aesthetics and the technical rigor required to capture two objects with such distinct speeds and brightnesses.

This event reinforces public interest in the comet Tsuchinshan-ATLAS, which has been the focus of astronomers worldwide. The image of the “X” astronomical will remain as a testament to the unpredictable dynamics of the cosmos and the luck required in astrophotography.

The event caused no material damage, as the meteor completely disintegrated in the upper layers of the atmosphere, leaving only the luminous trail for history.

With information Live Science

Superbright comet and fireball create a perfect X over European castle, a celestial sight that few have witnessed in history!

The visual encounter between the comet Tsuchinshan-ATLAS and a bright fireball defies mathematical odds and delights astronomers worldwide.

The encounter between Tsuchinshan-ATLAS and the fireball

Analysis of the odds and uniqueness of the record

The historical scenario and the legacy of the image

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Superbright comet and fireball create a perfect X over European castle, a celestial sight that few have witnessed in history!

The visual encounter between the comet Tsuchinshan-ATLAS and a bright fireball defies mathematical odds and delights astronomers worldwide.

The encounter between Tsuchinshan-ATLAS and the fireball

Analysis of the odds and uniqueness of the record

The historical scenario and the legacy of the image

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

BRICS is preparing a payment system inspired by the Brazilian PIX that will allow direct transactions between countries using national digital currencies without relying on the dollar or Western banks as intermediaries.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

Chinese engineers begin filling a 217-meter dam at an altitude of 3,000 meters and prepare a 2,240 MW hydroelectric power plant to integrate hydropower, solar, and wind energy in the upper Jinsha.

Giant turbines on the seabed of Scotland have been generating clean energy for nearly a decade without interruption, and now the big promise is that tidal power could solve the biggest problem of solar and wind energy: the unpredictability that no one has been able to overcome until today.

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