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Helys: a app que calcula o tempo exato que deve passar ao sol para produzir vitamina D sem riscos

Desenvolvida por um programador independente, a Helys usa uma fórmula científica que considera o seu tipo de pele, localização, hora do dia, condições meteorológicas e índice UV para calcular, em tempo real, quanto tempo de exposição solar é seguro e suficiente. Disponível gratuitamente apenas para iOS.

The post Helys: a app que calcula o tempo exato que deve passar ao sol para produzir vitamina D sem riscos appeared first on Tek Notícias.

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Perlas de Baily y otros fenómenos del eclipse solar total de 2026: qué vas a ver, en qué orden y por qué ocurre

El 12 de agosto de 2026 verás desde España perlas de Baily, la corona solar y misteriosas sombras volantes. Esta es la guía de lo que ocurrirá segundo a segundo durante la totalidad.
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Un fotógrafo casi desconocido captó el primer eclipse total hace 175 años y cambió la astronomía

Hace 175 años, una imagen borrosa obtenida sobre metal logró algo que ningún dibujo podía garantizar: que se conservase para siempre un eclipse total de Sol y transformar unos segundos de oscuridad en material de estudio.
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Sun Surveyor Lite: saiba onde vai estar o Sol para não falhar o eclipse solar de 12 de agosto

Estamos a poucos dias do eclipse solar mais aguardado das últimas décadas em Portugal, e a Sun Surveyor, uma excelente ferramenta para fotógrafos, poderá ser a ferramenta perfeita para prever a posição exata do Sol e a escolher o melhor local para observar o fenómeno em segurança.

The post Sun Surveyor Lite: saiba onde vai estar o Sol para não falhar o eclipse solar de 12 de agosto appeared first on Tek Notícias.

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Tesla buys 90% of a 509 MW Arizona solar and storage project

Tesla has signed a long-term deal to buy 90% of the output of Project Sterling, a big solar and battery plant going up in Arizona.

The project pairs 509 MW of solar with a 360 MW battery, and it’s being built by ContourGlobal, the power producer owned by private equity firm KKR. It’s expected online in 2028.

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Tesla buys the entire output of a new 140 MW Texas solar farm

Tesla has signed a long-term power purchase agreement to buy the entire output of a 140-MWac solar farm being built in northeast Texas.

The plant, called Lumen Farm, is being developed by Zelestra, an EQT-backed renewable developer. Construction is expected to start in 2027, with the farm going online in 2029.

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Tres eclipses y un destino: por qué Andalucía será el gran escenario del turismo científico

Entre 2026 y 2028, España vivirá una secuencia astronómica excepcional: dos eclipses totales y un eclipse anular. Andalucía será uno de los mejores lugares para contemplarlos y descubrir una forma de viajar en la que la curiosidad, la naturaleza y la ciencia son las auténticas protagonistas.
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Elon Musk quietly buys a $1 billion gas turbine company to power Grok

Elon Musk has quietly bought APR Energy, a Jacksonville-based company that operates a fleet of mobile gas and diesel turbines totaling more than 1 GW of generation capacity.

The self-styled champion of a “solar electric economy” now owns a fossil fuel power company — and he’s buying it to feed the electricity-hungry data centers running xAI’s Grok.

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Home solar in rural America: a storm just took out your power, now what?

There’s no shortage of advice on how to size a home solar and battery system, but most of it assumes a suburban home with city services and outages measured in hours, not days. Rural homes play by different rules, especially during summer storms. When heavy winds take down power lines and your utility prioritizes restoring urban neighborhoods first, having a home battery isn’t about convenience — it’s about damage control.

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Ex-Tesla exec builds the home heat pump Tesla gave up for robots

Drew Baglino spent nearly two decades building Tesla’s batteries, motors, and power electronics. Now the former Tesla SVP is quietly building the one home energy product Tesla talked up for years and never shipped: a residential heat pump.

His startup, Sadi Thermal Machines, is a direct bet on an idea Tesla floated openly in 2022 — before the company reoriented itself around humanoid robots and robotaxis.

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