Alexandre Henrique Lopes Porto
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xandaolp.bsky.social
Alexandre Henrique Lopes Porto
@xandaolp.bsky.social
68 followers 60 following 2K 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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LDN 1622: Dark Nebula in Orion
Image Credit & Copyright: Chris Fellows
apod.nasa.gov/apod/ap26012...
The silhouette of an intriguing dark nebula inhabits this cosmic scene. Lynds' Dark Nebula (LDN) 1622 appears against a faint background of glowing hydrogen gas only visible in long telescopic exposures of the region. In contrast, a brighter reflection nebula, vdB 62, is more easily seen just above the dusty dark nebula. LDN 1622 lies near the plane of our Milky Way Galaxy, close on the sky to Barnard's Loop, a large cloud surrounding the rich complex of emission nebulae found in the Belt and Sword of Orion. With swept-back outlines, the obscuring dust of LDN 1622 is thought to lie at a similar distance, perhaps 1,500 light-years away. At that distance, this 3 degree wide field of view would span about 100 light-years. Young stars do lie hidden within the dark expanse and have been revealed in Spitzer Space telescope infrared images. Still, the foreboding visual appearance of LDN 1622 inspires its popular name, the Boogeyman Nebula.
January 22, 2026 at 8:31 AM
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Memória quântica é feita com luz presa em gaiolas de luz
Créditos da imagem: Esteban Gómez-López et al.
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As gaiolas de luz, como as ilustradas na figura, permitem uma forte interação luz-matéria. O acesso lateral permite a rápida difusão dos átomos de césio, ao mesmo tempo que proporciona excelente confinamento do campo óptico.
January 22, 2026 at 7:37 AM
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Papel de nota fiscal feito de madeira elimina contaminantes perigosos
Créditos da imagem: Tom Nelis et al.
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Logotipo da universidade impresso em papel termal à base de lignina.
January 22, 2026 at 1:50 AM
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They Take in a Kitten Found in the Middle of Highway and Help Her Grow into Most Charming Little Cat www.lovemeow.com/kitten-highw...
They Take in a Kitten Found in the Middle of Highway and Help Her Grow into Most Charming Little Cat
They took in a kitten found in the middle of a highway and helped her grow into the most charming little cat. NachoGood Karma Pet RescueAbout three months ago, a tiny or...
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January 21, 2026 at 8:44 AM
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Barred Spiral Galaxy NGC 1365 from Webb
Image Credit: NASA, ESA, CSA, Janice Lee (NOIRLab) - Processing: Alyssa Pagan (STScI)
apod.nasa.gov/apod/ap26012...
A mere 56 million light-years distant toward the southern constellation Fornax, NGC 1365 is an enormous barred spiral galaxy about 200,000 light-years in diameter. That's twice the size of our own barred spiral Milky Way. This sharp image from the James Webb Space Telescope's Mid-Infrared Instrument (MIRI) reveals stunning details of this magnificent spiral in infrared light. Webb's field of view stretches about 60,000 light-years across NGC 1365, exploring the galaxy's core and bright newborn star clusters. The intricate network of dusty filaments and bubbles is created by young stars along spiral arms winding from the galaxy's central bar. Astronomers suspect the gravitational field of NGC 1365's bar plays a crucial role in the galaxy's evolution, funneling gas and dust into a star-forming maelstrom and ultimately feeding material into the active galaxy's central, supermassive black hole.
January 21, 2026 at 8:24 AM
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Processador inspirado no cérebro surpreende, aprendendo na velocidade da luz
Créditos da imagem: Jiaqi Li et al.
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Esquema da transmissão sináptica biológica (potencial de ação - estimulação pré-sináptica - abertura do canal - liberação de neurotransmissor - corrente pós-sináptica) e sua emulação eletrônica usando transistores de nanotubos de carbono.
January 21, 2026 at 8:17 AM
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Hidrogênio solar agora dispensa a caríssima platina
Créditos da imagem: Mia Halleröd Palmgren/Chalmers
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Reator experimental usado para demonstração da técnica, no qual as bolhas de hidrogênio podem ser vistas a olho nu.
January 21, 2026 at 8:15 AM
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Barra de ferro deixa Nebulosa do Anel parecida com cabeça de parafuso
Créditos da imagem: Roger Wesson et al.
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Imagem composta em RGB da Nebulosa do Anel (também conhecida como Messier 57 e NGC 6720). O anel externo brilhante é composto pela luz emitida por três íons diferentes de oxigênio, enquanto a "barra" no meio se deve à luz emitida por um plasma de átomos de ferro ionizados quatro vezes.
January 21, 2026 at 7:27 AM
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Cat Waits at Shopping Center Until Woman Approaches, He Leans into Her, Ready for Change
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Cat Waits at Shopping Center Until Woman Approaches, He Leans into Her, Ready for Change
A cat waited at a shopping center until a kind woman approached. He leaned into her, ready for change. BartSouthern Arizona Cat RescueA few months ago, a tabby cat was f...
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January 20, 2026 at 8:21 AM
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Io in True Color
Image Credit: NASA, JPL, Galileo Project
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The strangest moon in the Solar System is bright yellow. The featured picture, an attempt to show how Io would appear in the "true colors" perceptible to the average human eye, was taken in 1999 July by the Galileo spacecraft that orbited Jupiter from 1995 to 2003. Io's colors derive from sulfur and molten silicate rock. The unusual surface of Io is kept very young by its system of active volcanoes. The intense tidal gravity of Jupiter stretches Io and damps wobbles caused by Jupiter's other Galilean moons. The resulting friction greatly heats Io's interior, causing molten rock to explode through the surface. Io's volcanoes are so active that they are effectively turning the whole moon inside out. Some of Io's volcanic lava is so hot it glows in the dark.
January 20, 2026 at 8:09 AM
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Brasil sofreu uma grande colisão cósmica há 6 milhões de anos
Créditos da imagem: Álvaro Penteado Crósta/IG-Unicamp
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Alguns exemplares de "geraisitos", assim chamados em homenagem ao Estado de Minas Gerais, onde os primeiros exemplares foram encontrados.
January 20, 2026 at 7:53 AM
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Impressão 3D cria lentes para microscópio de super-resolução
Créditos da imagem: Ralf Bauer/University of Strathclyde
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Em cima, foto do novo microscópio, vendo-se os feixes de laser passando pelo sistema de lentes impressas em 3D. Embaixo, comparação das imagens geradas pela técnica atual (esquerda) e pelas novas lentes de baixo custo (direita).
January 20, 2026 at 7:47 AM
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Cientistas pedem reinicialização do conceito de sustentabilidade
Créditos da imagem: David Obura et al.
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Inter-relações entre visões de mundo, valores amplos e valores específicos (instrumentais, intrínsecos e relacionais), como ilustrado na figura.
January 20, 2026 at 7:36 AM
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Cat Shows Up Shy But Keeps Coming Back to Person Who is Kind to Him, Eventually Letting His True Self Shine
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Cat Shows Up Shy But Keeps Coming Back to Person Who is Kind to Him, Eventually Letting His True Self Shine
A cat showed up shy and hungry, but kept coming back to the person who was kind to him. Eventually, he let his true self shine. OliveKelsey @pennyandthefostersKelsey has...
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January 19, 2026 at 8:32 AM
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CTB 1: The Medulla Nebula
Image Credit: Pierre Konzelmann
apod.nasa.gov/apod/ap26011...
CTB 1 is the expanding gas shell that was left when a massive star toward the constellation of Cassiopeia exploded about 10,000 years ago. The star likely detonated when it ran out of elements, near its core, that could create stabilizing pressure with nuclear fusion. The resulting supernova remnant, nicknamed the Medulla Nebula for its brain-like shape, still glows in visible light because of the heat generated by its collision with confining interstellar gas. Why the nebula also glows in X-ray light, though, remains a topic of research. One hypothesis holds that an energetic pulsar was created and powers the nebula with a fast outwardly moving wind. Following this lead, a pulsar was found in radio waves that appears to have been expelled by the supernova explosion at over 1000 kilometers per second. Although the Medulla Nebula appears as large as a full moon, it is so faint that it took 84-hours of exposure with a small telescope in Texas, USA, to create the featured image.
January 19, 2026 at 8:27 AM
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Jupiter from the Webb Space Telescope
Image Credit: NASA, ESA, CSA, Jupiter ERS Team; Processing: Ricardo Hueso (UPV/EHU) & Judy Schmidt
apod.nasa.gov/apod/ap26011...
This infrared view of Jupiter by Webb is illuminating. High-resolution infrared images of Jupiter from the James Webb Space Telescope (Webb) reveal, for example, differences between high-floating bright clouds -- including the Great Red Spot -- and low-lying dark clouds. Also clearly visible in the featured Webb image are Jupiter's dust ring, bright auroras at the poles, and Jupiter's moons Amalthea and Adrastea. The footprint of large volcanic moon Io's magnetic funneling of charged particles onto Jupiter is also visible in the southern aurora. Some objects are so bright that light noticeably diffracts around Webb's optics creating streaks. Webb, which orbits the Sun near the Earth, has a mirror over six meters across making it the largest astronomical telescope ever launched -- with over six times more light-collecting area than Hubble. This infrared view of Jupiter by Webb is illuminating. High-resolution infrared images of Jupiter from the James Webb Space Telescope (Webb) reveal, for example, differences between high-floating bright clouds -- including the Great Red Spot -- and low-lying dark clouds. Also clearly visible in the featured Webb annotated image are Jupiter's dust ring, bright auroras at the poles, and Jupiter's moons Amalthea and Adrastea. The footprint of large volcanic moon Io's magnetic funneling of charged particles onto Jupiter is also visible in the southern aurora. Some objects are so bright that light noticeably diffracts around Webb's optics creating streaks. Webb, which orbits the Sun near the Earth, has a mirror over six meters across making it the largest astronomical telescope ever launched -- with over six times more light-collecting area than Hubble.
January 18, 2026 at 5:26 AM
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Computador quântico pode chegar a 100.000 qubits atômicos
Créditos da imagem: Will Lab/Columbia University
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Ilustração da matriz de qubits, onde cada qubit é um único átomo neutro.
January 18, 2026 at 5:05 AM
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Robô move os lábios corretamente quando fala
Créditos da imagem: Jane Nisselson/Columbia Engineering
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É a primeira vez que um robô, mostrado na figura, se torna capaz de aprender movimentos labiais faciais quase naturais.
January 18, 2026 at 1:53 AM
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They Took in a Kitten Living in a Garage and Went Back, Determined to Find All His Cat Siblings
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They Took in a Kitten Living in a Garage and Went Back, Determined to Find All His Cat Siblings
They took in a kitten living in a garage and went back, determined to find all his cat siblings. Laura @lauleon14Laura, a dedicated animal rescuer, was contacted about a...
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January 17, 2026 at 8:33 AM
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Apollo 14: A View from Antares
Image Credit: Edgar Mitchell, Apollo 14, NASA; Mosaic - Eric M. Jones
apod.nasa.gov/apod/ap26011...
Apollo 14's Lunar Module Antares landed on the Moon on February 5, 1971. Toward the end of the stay astronaut Ed Mitchell snapped a series of photos of the lunar surface while looking out a window, assembled into this detailed mosaic by Apollo Lunar Surface Journal editor Eric Jones. The view looks across the Fra Mauro highlands to the northwest of the landing site after the Apollo 14 astronauts had completed their second and final walk on the Moon. Prominent in the foreground is their Modular Equipment Transporter, a two-wheeled, rickshaw-like device used to carry tools and samples. Near the horizon at top center is a 1.5 meter wide boulder dubbed Turtle rock. In the shallow crater below Turtle rock is the long white handle of a sampling instrument, thrown there javelin-style by Mitchell. Mitchell's fellow moonwalker, Alan Shepard, also used a makeshift six iron to hit two golf balls. One of Shepard's golf balls is just visible as a white spot below Mitchell's javelin.
January 17, 2026 at 8:28 AM
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NGC 7023: The Iris Nebula
Image Credit & Copyright: Justus Falk
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These cosmic clouds have blossomed 1,300 light-years away in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers. Still, this deep telescopic image shows off the Iris Nebula's range of colors and symmetries embedded in surrounding fields of interstellar dust. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photoluminescence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The dusty blue petals of the Iris Nebula span about six light-years.
January 16, 2026 at 8:32 AM
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Agora é possível fazer backup de dados dos computadores quânticos
Créditos da imagem: Yamaguchi/Kempf
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Ilustração de como a criptografia possibilita o primeiro mecanismo de cópia de informações quânticas.
January 16, 2026 at 8:11 AM
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Truque óptico torna LEDs mais brilhantes e eficientes
Crédito da imagem: SIT
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A mágica da conversão dos fótons, ilustrada na figura, dá-se graças aos fenômenos da conversão ascendente e da plasmônica.
January 16, 2026 at 7:50 AM
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They Save a Cat with a Glorious Mane and Gentle Heart, Giving Him the Good Life He Always Wanted
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They Save a Cat with a Glorious Mane and Gentle Heart, Giving Him the Good Life He Always Wanted
They saved a cat with a glorious mane and a gentle heart, giving him the good life he always wanted. BestFriendsFelinesFor most of his life, Hetfield the Maine Coon live...
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January 15, 2026 at 8:24 AM
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Plato and the Lunar Alps
Image Credit & Copyright: Luigi Morrone
apod.nasa.gov/apod/ap26011...
The dark-floored, 95 kilometer wide crater Plato and sunlit peaks of the lunar Alps (Montes Alpes) are highlighted in this this sharp telescopic snapshot of the Moon's surface. While the Alps of planet Earth were uplifted over millions of years as continental plates slowly collided, the lunar Alps were likely formed by a sudden collision that created the giant impact basin known as the Mare Imbrium or Sea of Rains. The mare's generally smooth, lava-flooded floor is seen below the bordering mountain range. The prominent straight feature cutting through the mountains is the lunar Alpine Valley (Vallis Alpes). Joining the Mare Imbrium and northern Mare Frigoris (Sea of Cold) the valley extends toward the upper right, about 160 kilometers long and up to 10 kilometers wide. Of course, the large, bright lunar alpine mountain below and right of Plato crater is named Mont Blanc.
January 15, 2026 at 8:11 AM