Alexandre Henrique Lopes Porto
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Alexandre Henrique Lopes Porto
@xandaolp.bsky.social
69 followers 60 following 2.1K posts
Analista de Sistemas que gosta de séries. Gosta também de astronomia e tecnologia. No momento fazendo pós-doutorado no LNCC.
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Orion: The Running Man Nebula
Image Credit & Copyright: Robert G. Lyons (Robservatory)
apod.nasa.gov/apod/ap26020...
What part of Orion is this? Just north of the famous Orion Nebula is a picturesque star forming region in Orion's Sword that contains a lot of intricate dust -- some of which appears blue because it reflects the light of bright embedded stars. The region's popular name is the Running Man Nebula because, looked at from the right, part of the brown dust appears to be running legs. Cataloged as Sharpless 279, the reflection nebula is not only part of the constellation of Orion, but part of the greater Orion molecular cloud complex. Light from the Running Man's bright stars, including 42 Orionis, the bright star closest to the featured image center, is slowly destroying and reshaping the surrounding dust, which will likely be completely gone in about 10 million years. The nebula spans about 15 light years and lies about 1,500 light years away.
February 2, 2026 at 8:05 AM
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Galle: Happy Face Crater on Mars
Image Credit: NASA, MGS, MSSS
apod.nasa.gov/apod/ap26020...
Mars has put on a happy face. The Martian crater Galle is famous because it has internal markings that make it look like a face that is both smiling and winking. These markings were originally discovered in the 1970s in pictures taken by the Viking Orbiter. The Mars Global Surveyor (MGS) spacecraft that orbited Mars from 1996 to 2006 captured the featured picture. Happy Face Crater and its iconic features were formed by chance billions of years ago when a city-sized asteroid slammed into the Martian surface. All rocky planets and moons in our Solar System show impact craters, with the highest number of craters found on Earth's Moon and the planet Mercury. Earth and Venus would show the most, though, were it not for weather and erosion.
February 1, 2026 at 8:17 AM
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Artemis I: Flight Day 13
Image Credit: NASA, Artemis I
apod.nasa.gov/apod/ap26013...
On flight day 13 (November 28, 2022) of the Artemis 1 mission, the Orion spacecraft reached its maximum distance from Earth. At over 430,000 kilometers from Earth, its distant retrograde orbit also puts Orion nearly 70,000 kilometers from the Moon. In the same field of view in this video frame from flight day 13, planet and large natural satellite even appear about the same apparent size from the spacecraft's perspective. On flight day 26 (December 11, 2022), the uncrewed spacecraft splashed down on its home world concluding the historic Artemis I mission. The Artemis II mission, carrying 4 astronauts around the moon and back again, will launch no earlier than February 8.
February 1, 2026 at 3:18 AM
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O segredo magnético do aço não está no ferro, mas no carbono
Créditos da imagem: Luke J. Wirth et al.
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Sob o campo magnético, os átomos de ferro podem, como ilustrado na figura, facilitar a migração dos átomos de carbono.
February 1, 2026 at 3:11 AM
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NGC 1333: Stellar Nursery in Perseus (APOD: 2026 Jan 30)
Image Credit & Copyright: Robert Eder
apod.nasa.gov/apod/ap26013...
NGC 1333 is seen in visible light as a reflection nebula, dominated by bluish hues characteristic of starlight reflected by interstellar dust. A mere 1,000 light-years distant toward the heroic constellation Perseus, it lies at the edge of a large, star-forming molecular cloud. This telescopic close-up spans over two full moons on the sky or just over 15 light-years at the estimated distance of NGC 1333. It shows details of the dusty region along with telltale hints of contrasty red emission from Herbig-Haro objects, jets and shocked glowing gas emanating from recently formed stars. In fact, NGC 1333 contains hundreds of stars less than a million years old, most still hidden from optical telescopes by the pervasive stardust. The chaotic environment may be similar to one in which our own Sun formed over 4.5 billion years ago.
January 31, 2026 at 8:42 AM
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Sensores sem bateria monitoram sua saúde sem lhe incomodar
Crédito da imagem: University of Surrey
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Dispositivos de monitoramento da saúde desenvolvidos pela equipe para teste dos nanossensores autoalimentados.
January 30, 2026 at 5:33 PM
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Criados tubos de metal que flutuam na água e nunca afundam
Créditos da imagem: J. Adam Fenster/University of Rochester
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Tubo metálico flutuante feito de alumínio gravado quimicamente.
January 30, 2026 at 4:21 AM
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Propriedades recordistas do grafeno são encontradas em material 3D
Créditos da imagem: Jonathan Alaria/Blender
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Esta ilustração mostra raios atravessando o padrão em forma de favo de mel, simbolizando o fluxo rápido e confinado dos elétrons no material. Uma hélice semelhante ao DNA representa o empilhamento quiral que une esses padrões, protegendo o caráter bidimensional do fluxo eletrônico, apesar da estrutura tridimensional do material.
January 29, 2026 at 8:32 PM
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NGC 2442: Galaxy in Volans
Image Credit & Copyright: Mike Selby
apod.nasa.gov/apod/ap26012...
Distorted galaxy NGC 2442 can be found in the southern constellation of the flying fish, (Piscis) Volans. Located about 50 million light-years away, the galaxy's two spiral arms extending from a pronounced central bar give it a hook-shaped appearance in this deep and colorful image, with foreground stars scattered across the telescopic field of view. The image also reveals the distant galaxy's obscuring dust lanes, young blue star clusters and reddish star forming regions surrounding a core of yellowish light from an older population of stars. But the star forming regions seem more concentrated along the drawn-out (upper right) spiral arm. The distorted structure is likely the result of an ancient close encounter with a smaller galaxy that lies off top left of the frame. This telescopic field of view spans over 200,000 light-years at the estimated distance of NGC 2442.
January 29, 2026 at 8:27 AM
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Tensão de Hubble surge da física real, e não de erros de medição
Créditos da imagem: Simon Birrer et al.
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Uma montagem de oito sistemas de lentes gravitacionais com atraso temporal. Há uma galáxia inteira no centro de cada imagem, e os pontos brilhantes nos anéis ao redor são imagens de quasares atrás da galáxia, obtidas por lentes gravitacionais. Essas imagens são em cores falsas e são composições de dados de diferentes telescópios e instrumentos.
January 29, 2026 at 8:22 AM
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Esta célula solar nem precisa ficar ao Sol para gerar eletricidade
Créditos da imagem: Francineide Lopes de Araujo et al.
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Estrutura das células solares para ambientes interiores.
January 29, 2026 at 7:05 AM
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M78: Reflecting Blue in a Sea of Red
Image Credit & Copyright: Daniel McCauley
apod.nasa.gov/apod/ap26012...
In the vast Orion Molecular Cloud complex, several bright blue nebulas are particularly apparent. Pictured here in the center are two of the most prominent reflection nebulas - dust clouds lit by the reflecting light of bright embedded stars. The more famous nebula is M78, in the image center, cataloged over 200 years ago. To its upper left is the lesser known NGC 2071. Astronomers continue to study these reflection nebulas to better understand how interior stars form. The overall red glow is from diffuse hydrogen gas that covers much of the Orion complex that spans much of the constellation of Orion. Nearby in the greater complex, which lies about 1,500 light years away, are the Orion Nebula, the Horsehead Nebula, and Barnard's Loop -- partially seen here as the white band on the upper left.
January 28, 2026 at 7:51 AM
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Criados transistores 3D macios, capazes de abrigar células vivas
Créditos da imagem: Science/AAAS
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A inovação, ilustrada na figura. mereceu a capa da revista Science.
January 28, 2026 at 7:30 AM
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Aglomerado de galáxias antigo e quente questiona modelos cosmológicos
Crédito da imagem: Lingxiao Yuan
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Aglomerado de galáxias em formação no início do Universo: Jatos de rádio de galáxias ativas estão imersos em uma atmosfera quente intra-aglomerado (vermelha), ilustrando um grande reservatório térmico de gás no aglomerado nascente.
January 28, 2026 at 7:19 AM
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Orion's Treasures over Snowy Mountains
Image Credit & Copyright: Włodzimierz Bubak; Text: Ogetay Kayali (MTU)
apod.nasa.gov/apod/ap26012...
Rising over a frozen valley in the Tatra Mountains, the familiar stars and nebulas of Orion dominate this wide-field nightscape. The featured deep photo was taken in southern Poland's highest mountain range last month, where dark skies and alpine terrain combined to reveal both Earth's rugged beauty and the structure of our galaxy. Above the snowy mountains, Orion's bright belt stars anchor a region of glowing interstellar clouds. The Great Orion Nebula, a vast stellar nursery visible even to the unaided eye, shines near the center of the scene. Surrounding it is the enormous arc of Barnard's Loop, a faint shell of ionized hydrogen gas spanning much of the constellation. To the left, the round Rosette Nebula glows softly, while the grayish Witch Head Nebula hovers to the right, illuminated by nearby starlight. Near the top, the orange supergiant Betelgeuse marks the hunter's shoulder. Rising over a frozen valley in the Tatra Mountains, the familiar stars and nebulas of Orion dominate this wide-field nightscape. The featured annotated deep photo was taken in southern Poland's highest mountain range last month, where dark skies and alpine terrain combined to reveal both Earth's rugged beauty and the structure of our galaxy. Above the snowy mountains, Orion's bright belt stars anchor a region of glowing interstellar clouds. The Great Orion Nebula, a vast stellar nursery visible even to the unaided eye, shines near the center of the scene. Surrounding it is the enormous arc of Barnard's Loop, a faint shell of ionized hydrogen gas spanning much of the constellation. To the left, the round Rosette Nebula glows softly, while the grayish Witch Head Nebula hovers to the right, illuminated by nearby starlight. Near the top, the orange supergiant Betelgeuse marks the hunter's shoulder.
January 27, 2026 at 7:13 AM
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Madeira transparente regula temperatura e raios UV sem gastar energia
Créditos da imagem: Cheng Ai Li et al.
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A madeira transparente termocrômica comutável preenchida com cristal líquido disperso em polímero apresenta excelente desempenho de bloqueio ultravioleta para janelas inteligentes.
January 27, 2026 at 7:06 AM
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Menor capacitor do mundo impulsiona as medições quânticas
Créditos da imagem: Vienna University of Technology
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Figura mostrando o nanocapacitor com bobinas planares tornará microscópios muito mais precisos.
January 27, 2026 at 3:26 AM
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Supercondutividade: Descoberta uma ordem escondida no caos quântico
Créditos da imagem: Lucy Reading-Ikkanda/Simons Foundation
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Infográfico ilustrando o pseudogap.
January 27, 2026 at 12:29 AM
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NGC 55: A Galaxy of Nebulas
Image Credit & Copyright: Wolfgang Promper; Text: Ogetay Kayali (MTU)
apod.nasa.gov/apod/ap26012...
Can you see nebulas in other galaxies? Yes, some nebulas shine brightly enough -- if you know how to look. Clouds of hydrogen and oxygen emit light at very specific colors, and by isolating them, astronomers and astrophotographers can reveal structures that would otherwise be too faint to notice. This deep, 50-hour exposure highlights glowing hydrogen (red) and oxygen (blue) across galaxy NGC 55, viewed nearly edge-on. Also known as the String of Pearls Galaxy, NGC 55 is often compared to our Milky Way's satellite galaxy the Large Magellanic Cloud (LMC), although NGC 55 lies much farther away at about 6.5 million light-years. The resulting image uncovers a sprinkling of emission nebulas within and sometimes above the galaxy's dusty disk, offering a detailed look at distant star-forming regions.
January 26, 2026 at 7:42 AM
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Phobos: Doomed Moon of Mars
Image Credit: NASA, LPL (U. Arizona), MRO, HiRISE
apod.nasa.gov/apod/ap26012...
This moon is doomed. Mars, the red planet named for the Roman god of war, has two tiny moons, Phobos and Deimos, whose names are derived from the Greek for Fear and Panic. These Martian moons may well be captured asteroids originating in the main asteroid belt between Mars and Jupiter or perhaps from even more distant reaches of our Solar System. The larger moon, Phobos, is indeed seen to be a cratered, asteroid-like object in this stunning color image from the robotic Mars Reconnaissance Orbiter, which can image objects as small as 10 meters. But Phobos orbits so close to Mars - about 5,800 kilometers above the surface compared to 400,000 kilometers for our Moon - that gravitational tidal forces are dragging it down. In perhaps 50 million years, Phobos is expected to disintegrate into a ring of debris.
January 25, 2026 at 6:58 AM
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Earthset from Orion
Image Credit: NASA, Artemis 1
apod.nasa.gov/apod/ap26012...
Eight billion people are about to disappear in this snapshot from space taken on 2022 November 21. On the sixth day of the Artemis I mission, their home world is setting behind the Moon's bright edge as viewed by an external camera on the outbound Orion spacecraft. Orion was headed for a powered flyby that took it to within 130 kilometers of the lunar surface. Velocity gained in the flyby maneuver was used to reach a distant retrograde orbit around the Moon. That orbit is considered distant because it's another 92,000 kilometers beyond the Moon, and retrograde because the spacecraft orbited in the opposite direction of the Moon's orbit around planet Earth. Swinging around the Moon, Orion reached a maximum distance (just over 400,000 kilometers) from Earth on 2022 November 28, exceeding a record set by Apollo 13 for most distant spacecraft designed for human space exploration.
January 24, 2026 at 8:16 AM
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Compósito que se autoconserta pode durar séculos
Créditos da imagem: Jack S. Turicek et al.
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Autocura por meio de reparo térmico: Agente de cura termoplástico impresso em 3D (sobreposição azul) em reforço de fibra de vidro. No detalhe, termografia infravermelha durante a autocura de uma peça do compósito de fibra fraturado.
January 24, 2026 at 8:15 AM
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Para um tecido robótico mais forte, use ponto em X
Créditos da imagem: LMTS/EPFL
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Diferentes arquiteturas de tecido e suas direções de cruzamento de fibras.
January 24, 2026 at 3:31 AM
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Planetary Nebula Abell 7
Image Credit & Copyright: Martin Pugh
apod.nasa.gov/apod/ap26012...
Very faint planetary nebula Abell 7 is about 1,800 light-years distant. It lies just south of Orion in planet Earth's skies toward the constellation Lepus, The Hare. Posing with scattered Milky Way stars, its generally simple spherical shape about 8 light-years in diameter is revealed in this deep telescopic image. The beautiful and complex shapes seen within the cosmic cloud are visually enhanced by the use of long exposures and narrowband filters that capture emission from hydrogen and oxygen atoms. Otherwise Abell 7 would be much too faint to be appreciated by eye. A planetary nebula represents a very brief final phase in stellar evolution that our own Sun will experience 5 billion years hence, as the nebula's central, once sun-like star shrugs off its outer layers. Abell 7 itself is estimated to be 20,000 years old. But its central star, seen here as a fading white dwarf, is some 10 billion years old.
January 23, 2026 at 8:50 AM
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Este processador demonstra na prática a computação analógica na memória
Crédito da imagem: Politecnico di Milano
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O chip experimental integrado (no centro), conectado ao chip de suporte por meio de ligações por fio, pronto para as fases de teste e caracterização.
January 23, 2026 at 8:47 AM