Earth and Universe

Climate, geology, oceans, atmosphere, astronomy and space phenomena.

19articles

Ilustração conceitual de três helicópteros SkyFall sobre Marte, equipados para mapear o terreno e procurar gelo abaixo da superfície.

Earth and Universe07/08/20268 min read

SkyFall: Why NASA wants three helicopters on Mars with ultralight radar and antenna to search for ice

NASA tested a 150-gram antenna for SkyFall's radar, which envisions three helicopters to map shallow ice on Mars. The mission is still under development.

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Mapa duplo mostra a faixa do eclipse de 12 de agosto no Hemisfério Norte e a visibilidade limitada das Perseidas por região do Brasil.

Earth and Universe06/08/20267 min read

Perseids and eclipse on August 12: what will be visible from Brazil — and what will not be

On August 12, 2026, the total eclipse will not be seen in Brazilian cities. The Perseids may appear, especially in the North and Northeast, with clear and dark skies.

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Sequência registrada pelo Perseverance mostra a Terra como um ponto luminoso antes, durante e depois de ser ocultada pela lua marciana Fobos.

Earth and Universe05/08/20268 min read

Earth disappeared behind Phobos: what Perseverance really recorded

Viewed from Mars, Earth became a dot about a pixel long and disappeared behind Phobos. Understand why the phenomenon was an occultation, not an eclipse.

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Diagrama simulado da trajetória do estágio superior de Falcon 9 até a região entre as crateras Bell e Einstein, próxima ao limbo da Lua.

Earth and Universe05/08/20268 min read

Falcon 9 stage should have reached the Moon on August 5: what is known

Tracking indicates that a Falcon 9 upper stage reached the Moon on August 5, but visual confirmation depends on orbital images of the site.

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Detalhe infravermelho da Nebulosa da Hélice mostra milhares de estruturas alongadas alaranjadas, chamadas nós cometários, sobre o fundo escuro.

Earth and Universe04/08/20268 min read

The Helix Nebula’s “cometary knots” are not comets: what Webb reveals

Webb image reveals thousands of knots of gas and dust in the Helix Nebula. They resemble comets, but belong to the matter expelled by a star.

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Diagrama em perspectiva mostra um meteoro na atmosfera terrestre diante da distante nebulosa Sh2-126, na constelação de Lacerta.

Earth and Universe04/08/20266 min read

A meteor ‘photobombed’ a nebula: what the photo really records

The NASA image brings together a meteor in the atmosphere and the Sh2-126 nebula, about 1,200 light years away. Understand perspective, scale and long exposure.

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Calendário astronômico de agosto de 2026 com Perseidas, Vênus e eclipses, destacando a visibilidade de cada evento no Brasil.

Earth and Universe03/08/202610 min read

What you can really see in the Brazilian sky in August 2026

See which astronomical events in August 2026 will actually be visible from Brazil, with times, best regions and observation precautions.

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