Miguel Claro Astrophotography

Miguel Claro Astrophotography Fotógrafo Profissional, Autor, Comunicador. Astrofotógrafo Oficial Dark Sky® Alqueva | ESO Photo Ambassador

É com prazer que partilho convosco uma imagem, que não sendo nova, foi hoje destacada novamente no site da Nasa como Ast...
19/04/2026

É com prazer que partilho convosco uma imagem, que não sendo nova, foi hoje destacada novamente no site da Nasa como Astronomy Picture of the Day (APOD).

Espero que gostem e tenham um Excelente Domingo.

EN: It seems that one of my old images is runing again as Astronomy Picture of the Day (APOD) of today 19th April 2026. Hope you enjoy it

A different astronomy and space science related image is featured each day, along with a brief explanation.

😄🤩 Vai estar céu limpo no Dia 14 de Fevereiro de acordo com as previsões mais recentes no DARK SKY AlquevaNOITE ESPECIAL...
11/02/2026

😄🤩 Vai estar céu limpo no Dia 14 de Fevereiro de acordo com as previsões mais recentes no DARK SKY Alqueva

NOITE ESPECIAL À LUZ DAS ESTRELAS DIA 14 de FEVEREIRO ⭐️❤️✨

Surpreenda a sua cara metade e venha ao Observatório Oficial Dark Sky® Alqueva, descobrir os segredos escondidos do Universo através dos nossos telescópios, acompanhado de um espumante à luz das estrelas.

Celebre connosco a paixão pelos astros e traga o amor da sua vida para uma noite bem especial sob o nosso céu estrelado.

Inscrições limitadas.
Para mais informações, consultar a página do evento no nosso site, ou envie um e-mail para:
[email protected]

https://darkskyalqueva.com/noite-especial-a-luz-das-estrelas-dia-14-de-fevereiro-de-2026-pt/

Surpreenda a sua cara metade com uma Observação Nocturna especial acompanhada de Espumante e iguarias regionais sob os céus do Dark Sky® Alqueva. Celebre connosco a paixão pelos astros e traga o amor da sua vida para uma noite bem especial sob os céus do Observatório Oficial Dark Sky® Alquev...

27/12/2025

🌖 💧The Moon’s water might have come from a surprising source: Earth itself.
While asteroid and comet impacts are known to have delivered some water to the Moon, a new study reveals an unexpected source: Earth’s own atmosphere.

Scientists propose that hydrogen and oxygen ions escaping from Earth, especially as the Moon passes through Earth's magnetosphere tail each month, could have steadily deposited water onto the lunar surface over billions of years.

When solar winds stretch Earth's magnetic field, broken field lines allow atmospheric ions to escape. As the Moon crosses this tail, it triggers the return of these ions, creating a "shower" that implants hydrogen and oxygen onto the Moon’s surface, forming permafrost and, potentially, subsurface liquid water.

Researchers analyzed gravitational data from NASA’s Lunar Reconnaissance Orbiter and identified crater fractures that could trap and preserve this water. They estimate that up to 3,500 cubic kilometers (enough to fill Lake Huron) could have accumulated over 3.5 billion years.

This discovery holds major implications for future lunar exploration. NASA’s Artemis program aims to establish a base camp at the Moon’s south pole, and knowing that ancient Earth-sourced water could be trapped there offers valuable guidance for choosing station locations and securing vital life support resources.

The findings are published in Scientific Reports.

Image by Miguel Claro Astrophotography

RESEARCH PAPER 📄
Gunther Kletetschka, "Distribution of water phase near the poles of the Moon from gravity aspects," Scientific Reports (2022)

Let the show begin…
05/12/2025

Let the show begin…

🌠 Over the next several nights, bright meteors will streak across the sky as Earth passes through the debris trail of asteroid 3200 Phaethon. These meteors are fast, bold, and often colorful — which is why the Geminids are considered the strongest meteor shower of the year.

The Geminids are active from December 4-17. The true show peaks around December 13–14, when you could see 100+ meteors per hour from a dark location. But you can already spot some early fireballs if you head outside late tonight.

Just find a dark spot, let your eyes adjust, and look up.
The sky has officially switched to showtime mode!

Photo by: Miguel Claro Astrophotography

From The Secrets Of The Universe
24/11/2025

From The Secrets Of The Universe

📡 After nearly five decades of speculation, astronomers may have finally uncovered a natural explanation for the enigmatic Wow! signal—a mysterious cosmic radio burst that fired imaginations about alien life.

First detected by the Big Ear radio telescope in Ohio in 1977, the Wow! signal was a sudden, intense burst near the hydrogen line (1420 MHz), lasting just 72 seconds. Its remarkable features—narrow frequency range and strength—defied known natural sources, prompting debates about everything from comets to extraterrestrial beacons.

A new study led by Abel Méndez at the University of Puerto Rico at Arecibo offers a compelling answer. By observing clouds of atomic hydrogen in front of red dwarf stars, the team detected fainter radio bursts with signatures echoing the original Wow! event. The researchers propose that when a highly energetic source—such as a magnetar flare—passes behind such a cloud, it could trigger the atoms to emit a powerful, laser-like microwave beam called a “maser.” If this rare alignment and event occurred, it could reproduce a signal just like the Wow! burst observed in 1977.

This work is unique, as astronomers have identified maser emissions from hydrogen molecules before, but never from clouds of atomic hydrogen—the exact conditions possibly behind the Wow! signal. The idea awaits further confirmation, as finding a magnetar flaring behind a hydrogen cloud is extremely uncommon.

Looking ahead, revisiting the Wow! signal’s original coordinates with new instruments could reveal whether this natural mechanism finally closes the case on one of astronomy’s great mysteries—or if more surprises await in the depths of the cosmos.

📄 RESEARCH PAPER

📌 Abel Méndez et al., “Arecibo Wow! I: An Astrophysical Explanation for the Wow! Signal”, arXiv (2024)

Photo by: Miguel Claro Astrophotography

So interesting The Secrets Of The Universe!
17/11/2025

So interesting The Secrets Of The Universe!

The November 2025 solar storms may turn out to be the clearest sign yet that Solar Cycle 25 is heading for a double-peaked maximum. Instead of a single sharp crest in sunspot activity, the Sun sometimes produces two distinct surges separated by a lull.

That pattern has been seen in previous cycles, like Solar Cycle 24, where solar activity spiked, dipped, and then rose again a couple of years later. In 2024, the Sun already delivered an unexpectedly strong peak, with intense sunspot groups, powerful flares, and geomagnetic storms that exceeded the “fairly weak” scenario originally predicted for Cycle 25.

By late 2025, many scientists expected the cycle to be past its prime. Instead, a new outburst of activity arrived: large, complex sunspot regions, multiple X-class flares, and geoeffective coronal mass ejections that drove some of the most powerful geomagnetic storms since 2024.

This renewed strength suggests that the Sun may be undergoing hemispheric desynchronization—where the northern and southern hemispheres reach their maxima at different times. When their peaks don’t align, the combined cycle can show two broad maxima instead of one.

If Solar Cycle 25 truly has a second peak, it will challenge the conservative forecasts made before the cycle began and improve our models of the solar dynamo—the churning magnetic engine inside the Sun. Practically, it also means Earth might face elevated space-weather risks for longer than expected, keeping satellites, power grids, and communication systems under heightened vigilance well into the late 2020s.

Photograph by: Miguel Claro Astrophotography

Para quem tenha curiosidade em saber mais sobre o Lemmon…
21/10/2025

Para quem tenha curiosidade em saber mais sobre o Lemmon…

O cometa C/2025 A6 (Lemmon) é o cometa mais visível a partir da Terra deste ano – uma relíquia gelada das origens do sistema solar que só voltará no próximo milénio.

Comet Lemmon 🤩 visto a partir do nosso Observatório do Dark Sky® Alqueva, na Cumeada, Portugal. Obrigado pela partilha T...
18/10/2025

Comet Lemmon 🤩 visto a partir do nosso Observatório do Dark Sky® Alqueva, na Cumeada, Portugal. Obrigado pela partilha The Secrets Of The Universe

Comet C/2025 A6 (Lemmon) is brightening! ☄️

🌠 This October, the night sky offers a rare treat as Comet C/2025 A6 (Lemmon) races toward its closest encounter with Earth in over a millennium.

Discovered in January 2025 by the Mount Lemmon Survey in Arizona using a 1.5-meter Cassegrain reflector telescope, Comet Lemmon has undergone a dramatic transformation.

Originally a faint object at magnitude +21.5, the comet has now brightened to around magnitude +5.7—nearing naked-eye visibility under dark skies. The increased brightness is fueled by sunlight vaporizing the icy nucleus, forming a glowing green corona and a long tail of dust and gas that sweeps across the heavens.

In mid-October, Comet Lemmon passes near prominent stars such as Alkaphrah in Ursa Major and Cor Caroli in Canes Venatici, making its closest approach to Earth on October 21. At that point, it will be positioned in the constellation Boötes, just 56 million miles (90 million km) from our planet, and move on to perihelion (closest to the Sun) on November 8. Its orbital period, spanning roughly 1,350 years, means this spectacle won't return for many generations.

Observers and astrophotographers have documented events such as the solar wind tearing away part of the comet’s tail—a phenomenon captured with high-grade astrophotography instruments.

These rapid changes make Lemmon an exciting target for both professionals and amateur astronomers. Expect optimal views with binoculars and small telescopes, while perfect conditions could offer a fleeting chance to spot Lemmon with the unaided eye.

Photograph by Miguel Claro Astrophotography

My most recent photo contribution to National Geographic about supermoonsArticle by Andrew Fazekas The Night Sky Guy
03/10/2025

My most recent photo contribution to National Geographic about supermoons

Article by Andrew Fazekas The Night Sky Guy

This fall, every full moon will be a supermoon. Here’s how often it happens—and why.

My solar time lapse work featured today on National Geographic! Hope you enjoy it.
24/07/2025

My solar time lapse work featured today on National Geographic! Hope you enjoy it.

Endereço

Alentejo

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