Alexandros Simitzis’ Post

A carbon-lite atmosphere could be a sign of water and life on other terrestrial planets A low carbon abundance in planetary atmospheres could be a signature of habitability Best chance of finding liquid water, and even life on other planets, is to look for the absence of carbon dioxide in their atmospheres. Scientists at MIT, the University of Birmingham, and elsewhere say that astronomers' best chance of finding liquid water, and even life on other planets, is to look for the absence, rather than the presence, of a chemical feature in their atmospheres. The researchers propose that if a terrestrial planet has substantially less carbon dioxide in its atmosphere compared to other planets in the same system, it could be a sign of liquid water -- and possibly life -- on that planet's surface. What's more, this new signature is within the sights of NASA's James Webb Space Telescope (JWST). While scientists have proposed other signs of habitability, those features are challenging if not impossible to measure with current technologies. The team says this new signature, of relatively depleted carbon dioxide, is the only sign of habitability that is detectable now. "The Holy Grail in exoplanet science is to look for habitable worlds, and the presence of life, but all the features that have been talked about so far have been beyond the reach of the newest observatories," says Julien de Wit, assistant professor of planetary sciences at MIT. "Now we have a way to find out if there's liquid water on another planet. And it's something we can get to in the next few years." Beyond a glimmer Astronomers have so far detected more than 5,200 worlds beyond our solar system. With current telescopes, astronomers can directly measure a planet's distance to its star and the time it takes it to complete an orbit. Those measurements can help scientists infer whether a planet is within a habitable zone. But there's been no way to directly confirm whether a planet is indeed habitable, meaning that liquid water exists on its surface. #unitofbharat #carbonlite #atmosphere #terrestrial #water #planets #habitable #carbondioxide

🌌 Have you ever wondered how we can detect foreign planets? 🪐 The universe is a vast expanse, filled with countless stars and planets waiting to be discovered. But how exactly do astronomers uncover these distant worlds orbiting foreign suns? Let's delve into the fascinating methods used to detect exoplanets beyond our solar system. 🔭 Transit Method: Picture a distant planet passing in front of its host star, causing a subtle dimming of its light as viewed from Earth. This phenomenon, known as a transit, forms the basis of the transit method. By meticulously observing stars for periodic dips in brightness, astronomers can identify the presence of an exoplanet in orbit. The combination of these slight fluctuations in brightness, coupled with their regular occurrence, serves as compelling evidence for the existence of a planet. 💫 Radial Velocity Method: As an exoplanet orbits its parent star, both entities are bound by gravity, resulting in a delicate dance around their common center of mass. This gravitational interplay induces a subtle wobble in the star's motion along our line of sight. By precisely measuring these tiny shifts in the star's spectral lines, astronomers can infer the presence and characteristics of an orbiting exoplanet. 🌟 Direct Imaging: Directly capturing the faint light of an exoplanet amidst the overwhelming glare of its host star is an extraordinary feat. Advanced telescopes equipped with specialized instruments can selectively block out the star's light, revealing the orbiting exoplanet. Direct imaging allows astronomers to study the properties of exoplanets, such as their composition, temperature, and even weather patterns, offering valuable insights into their nature. 🌞 Capturing Light: By harnessing the power of sophisticated telescopes and imaging techniques, astronomers can capture the light emitted or reflected by exoplanets. Analyzing this light provides crucial information about the planet's atmosphere, composition, and potential habitability. #Exoplanets #Astronomy #SpaceExploration #CosmicDiscovery 🚀✨

Tidal Disruption Event ☆☆✨️When a Star gets a little too close to a Supermassive Black Hole!!!!!✨️☆☆ ☆When a wandering star gets too close to a black hole, it experiences a strong gravitational force from the black hole that is known as tidal forces. Tidal forces are caused by the different gravitational pulls on different parts of the star. This differential pull can cause the star to stretch and eventually tear apart. This event is called the tidal disruption event, and the process is known as spaghettification. ☆ Star becomes 'Spaghettified', when the materials from a Star are heated to enormous temperatures and subsequently pulled into a Black Hole generating detectable and brightened flares before the star disappears. ☆ The shocks produced by the colliding debris, along with the tremendous amount of heat generated, produce an incredibly brilliant burst of light. ☆ During these events, powerful blasts of materials can be launched at 10,000 km/s (6,200 miles per second) outwards that obstruct the view. ☆▪︎☆▪︎☆ 🎯Follow @Go_Atomico and @modernsciencex for more interesting science and Astronomy content. 👥Tag someone who would love to see this video! Love science, physics and astronomy? If yes, you should Follow 👉 @Go_Atomico and @modernsciencex for more amazing space and astronomy contents. 🎯Follow @Go_Atomico 🎯Follow @modernsciencex 🌐 credit clips used in this editing: NASA SVS, ESO 🌐CREDIT COMPOSITION/ EDITING @glamour_physics @modernsciencex CONTENT USED FOR EDUCATIONAL PURPOSES ONLY ☆•☆•☆ ________________ All rights reserved for respected owners content is used for educational purposes only. ________________ #go_Atomico #Atomico #blackhole #blackholes #wormhole #alberteinstein #quasar #quantumphysics #quantumphysics #spacelover #astronomy #astronomical #astronomy #astronomia #sun #stephenson#fisica #astrophysicslover #space #astronauts

📡 An unknown radio signal from #space, repeating approximately every hour, has been detected by the #ASKAP radio telescope in Australia. 🧐 This periodic radio signal is unlike anything astronomers have ever seen before. 😮😵 ➡️ Not only is its hour-long cycle the longest ever seen, but it also alternates between three different states of emission: long, bright flashes with linear polarisation; much weaker pulses with circular polarisation; or nothing at all (only to reappear an hour later). Unfortunately, it is very UNLIKELY that this is a *LIVING BEING* from outer space trying to make contact with us. I know you were hoping for that. 😞 But it is still a very puzzling observation for astronomers. ➡️ Usually this kind of signal is emitted by rotating neutron stars, but the length and type of these pulses are bizarre and could lead astronomers to reconsider some established knowledge about stars at the end of their lives. ➡️ In fact, the authors of the study think they could be produced by a slowly rotating neutron star or a white dwarf. Or perhaps from part of a binary system in which a neutron star or white dwarf orbits another unknown star. ➡️ Further studies will be conducted to clarify this mystery. ➡️ Stay tuned and share if you found this interesting. Image credit: Carl Knox/OzGrav #TalkScienceWithVirginia #sciencenews #TechTalk #astronomy

International team of astronomers observe changing weather patterns on exoplanet - Read more at:

Astronomers Hit the Cosmic Lottery with Discovery of Perfect 6-Planet Solar System Stop the presses, astronomers just struck gold! An epic new solar system has been spotted just 100 light-years away, and it's packing a perfect six-planet lineup. I'm talking a pristine system in celestial harmony. These researchers hit the astronomical lottery with this baby. Six planets, all lined up in a row and orbiting as stable as can be. No crashes, no chaos, just billions of years of peaceful revolutions around the host star. You love to see it! Finding an intact system like this is like glimpsing into our early solar system's formation. It's a chance to study how these planetary configurations took shape and stood the test of time. And at just 100 light-years from Earth? This discovery is practically in our galactic backyard! Astronomers are cracking open new insights into the enduring nature of planets across the galaxy. It's a big win in the hunt for worlds that could potentially support life. Who knows, maybe one of these six planets harbors some alien neighbors! So take a bow, astronomy team. A perfectly preserved 6-planet solar system? Now that's how you hit the cosmic lottery! This is one for the record books. What a time to be gazing at the stars! #Astronomy #Astronomer #Stars #Planet #SolarSystem #NewPlanet #Space

Why are #exoplanets with around 2 #Earth radii relatively rare? Simulations by scientists from MPIA, Universität Bern, and Université de Genève found migrating icy planets to play a key role in explaining this phenomenon. When they enter the inner realms of their planetary systems, the heat from the central #star thaws and evaporates the #ice creating an extended #water vapour #atmosphere. #waterworld #astronomy #subneptune https://lnkd.in/ejb9gaJP

🌌 Exciting News from the Astronomy World! 🌟 The Vera C. Rubin Observatory (formerly LSST) is nearing completion in Chile! 🇨🇱🔭 This groundbreaking telescope, equipped with the LSST camera, will revolutionize our understanding of the cosmos. 🌠 🔍 The Vera Rubin Telescope will map the entire southern sky multiple times, capturing dynamic snapshots of celestial phenomena like asteroids, supernovae, galaxies, dark matter, and dark energy! 💫 🔭 The telescope features an impressive 8.4-meter mirror and the LSST camera with 3.2 giga pixels, boasting advanced technology to observe faint objects and phenomena across vast cosmic distances. Hannah Pollek is giving a wonderful detailed explanation. 🌌 🛰️ By surveying the sky every few nights, the Vera Rubin Observatory will provide a treasure trove of data for astronomers and researchers, enabling deeper insights into the mysteries of the universe. 🌌 🌟 Stay tuned for incredible discoveries and insights into our cosmic neighborhood! 🚀 Stay curious! 😉 #VeraRubinObservatory #Astronomy #Telescope #LSST #SpaceExploration #Cosmos #DarkMatter #DarkEnergy #Asteroids #Galaxies #Chile #Innovation #Science #Research #Exploration 🌌🔭 Credit:SLAC National Accelerator Laboratory

The Phenomenon of Total Solar Eclipse Mark your calendars for a celestial spectacle! On April 8, 2024, a total solar eclipse will sweep across North and Central America, plunging regions into darkness as the Moon passes directly between the Earth and the Sun. This rare event was the highlight of NASA's media briefing at the 104th American Meteorological Society Annual Meeting. As the Moon's shadow races across the continent, those in the path of totality will experience an eerie twilight, with the possibility of glimpsing the Sun's elusive corona, weather permitting. Viewing the Eclipse Safely and Activities But how can you watch this astronomical event safely? NASA experts, including Dr. Kelly Korreck, Dr. Alex Lockwood, and Dr. Jamie Favors, emphasized the importance of protecting your eyes with special eclipse glasses. They also suggested engaging at-home activities to enrich the experience. Whether you're crafting pinhole cameras or tuning into live streams, there's an accessible way for everyone to enjoy the eclipse's grandeur. Solar Maximum and Space Weather Impact What's more, the 2024 eclipse coincides with solar maximum, a period of peak solar activity. This timing offers a unique lens through which to observe the Sun's dynamic behavior. Dr. Favors, Director of NASA's Space Weather Program, drew parallels between space weather and meteorology, underscoring the significant impact solar phenomena have on Earth. This includes everything from satellite operations to power grids, making the study of space weather ever more critical. Call to Action and Social Engagement Ready to be part of this astronomical event? Start by visiting NASA's 2024 total solar eclipse website, accessible via a handy QR code. You can also delve into the stunning compilation of solar imagery from NASA's Solar Dynamics Observatory to get a glimpse of what solar maximum truly looks like. And don't forget to join the conversation online. Share your eclipse plans, thoughts, and experiences using the hashtags #inergency, #egreenews, and #Evideosecurity. Let's make the 2024 total solar eclipse a moment of collective awe and learning, under the shadow of our magnificent Moon.

The Phenomenon of Total Solar Eclipse Mark your calendars for a celestial spectacle! On April 8, 2024, a total solar eclipse will sweep across North and Central America, plunging regions into darkness as the Moon passes directly between the Earth and the Sun. This rare event was the highlight of NASA's media briefing at the 104th American Meteorological Society Annual Meeting. As the Moon's shadow races across the continent, those in the path of totality will experience an eerie twilight, with the possibility of glimpsing the Sun's elusive corona, weather permitting. Viewing the Eclipse Safely and Activities But how can you watch this astronomical event safely? NASA experts, including Dr. Kelly Korreck, Dr. Alex Lockwood, and Dr. Jamie Favors, emphasized the importance of protecting your eyes with special eclipse glasses. They also suggested engaging at-home activities to enrich the experience. Whether you're crafting pinhole cameras or tuning into live streams, there's an accessible way for everyone to enjoy the eclipse's grandeur. Solar Maximum and Space Weather Impact What's more, the 2024 eclipse coincides with solar maximum, a period of peak solar activity. This timing offers a unique lens through which to observe the Sun's dynamic behavior. Dr. Favors, Director of NASA's Space Weather Program, drew parallels between space weather and meteorology, underscoring the significant impact solar phenomena have on Earth. This includes everything from satellite operations to power grids, making the study of space weather ever more critical. Call to Action and Social Engagement Ready to be part of this astronomical event? Start by visiting NASA's 2024 total solar eclipse website, accessible via a handy QR code. You can also delve into the stunning compilation of solar imagery from NASA's Solar Dynamics Observatory to get a glimpse of what solar maximum truly looks like. And don't forget to join the conversation online. Share your eclipse plans, thoughts, and experiences using the hashtags #inergency, #egreenews, and #Evideosecurity. Let's make the 2024 total solar eclipse a moment of collective awe and learning, under the shadow of our magnificent Moon.