In this mosaic image stretching 340 light-years across, Webb’s Near-Infrared Camera (NIRCam) displays the Tarantula Nebula star-forming region in a new light, including tens of thousands of never-before-seen young stars that were previously shrouded in cosmic dust. The most active region appears to sparkle with massive young stars, appearing pale blue. Scattered among them are still-embedded stars, appearing red, yet to emerge from the dusty cocoon of the nebula. NIRCam is able to detect these dust-enshrouded stars thanks to its unprecedented resolution at near-infrared wavelengths.
📹 ESA – European Space Agency 📸 NASA, ESA, CSA, and STScI, N. Bartmann 🎶 Haunted House – Goosebumps
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🚩 Considered one of the most important defeats in Roman history, the Battle of the Teutoburg Forest brought the triumphant period of expansion under Augustus to an abrupt end. It discouraged the Romans from pursuing the full conquest of Germania, instead switching to tribute collection, thus can be considered one of the most important events in European history.
📢 Narrated by David McCallion
🎼 Music: EpidemicSound Filmstro
📚 Sources: Dio Cassius, Roman History (1st century) Peter S. Wells, The Battle That Stopped Rome (2003) Teutoburg Forest 9 AD – Michael McNally (2007) Germanicus – Lindsay Powell (2013) In the name of Rome – Adrian Goldsworthy (2016)
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#stiinta #fizica #science #tehnologie #technology #cristianpresura #ad algoritm:”Un panou solar funcționează pe baza semiconductoarelor, mai precis siliciului. Când lumina cade pe acest material, energia fotonilor permite electronilor din banda de valență să treacă în banda de conducție, unde devin mobili și pot contribui la generarea curentului electric. Structura internă a unui panou solar este formată din două straturi dopate diferit: un strat n-dopat (cu surplus de electroni) și un strat p-dopat (cu lipsă de electroni sau “goluri”). La interfața acestor două straturi se formează un câmp electric, care dirijează electronii și golurile în direcții opuse.
Atunci când fotonii sunt absorbiți de stratul de siliciu din apropierea interfeței, electronii eliberați sunt împinși de câmpul electric într-un circuit extern, ceea ce creează curent electric. Prin conectarea a doi electrozi la straturile dopate și expunerea la lumină, electronii și golurile generate se separă, contribuind la formarea fluxului de curent electric. Acest proces permite funcționarea panoului fără componente în mișcare, oferindu-i o durabilitate ridicată.
Pentru o eficiență optimă, partea n-dopată este subțire, permițând pătrunderea luminii, în timp ce partea p-dopată este mai groasă, extinzând zona de interfață unde apare câmpul electric. Electrozii de la suprafață sunt de obicei sub formă de rețea, pentru a lăsa lumina să pătrundă, iar cei de la bază acoperă complet cristalul, redistribuind electronii.
Există panouri monocristaline, cu eficiență de 15-25%, și policristaline, mai puțin eficiente, între 10-15%. Ambele tipuri folosesc principiul semiconductorilor și produc electricitate doar prin expunerea la lumină, fără piese în mișcare.”
Steve Spangler is a bestselling author, STEM educator and Emmy award-winning television personality with more than 2,100 television appearances to his credit. Steve appeared as a regular guest on the Ellen DeGeneres Show from 2007-2022. Learn more about Steve at https://stevespangler.com/about-steve-spangler/
How does cold and heat create such catastrophic reactions?! Using ice and fire, we’ll create pressure inside steel drums and cool rockets to create INSANE CHEMICAL REACTIONS! Watch Phil as he performs more amazing science experiments that will for sure blow your mind!
In mythology, centaurs are half-human, half-horse creatures, but in space, they’re celestial objects orbiting the Sun between Jupiter and Neptune.
Centaurs are “hybrid” objects in the sense that they share characteristics with trans-Neptunian objects from the Kuiper Belt reservoir and short-period comets. A team of scientists used the James Web Telescope to study Centaur 29P.
While data from previous observations of Centaur 29P showed a carbon monoxide (CO) gas jet pointed toward Earth, Webb parsed the jet’s composition in greater detail, and also detected multiple never-before-seen features of the centaur: two jets of carbon dioxide (CO2) emanating in the north and south directions, and another jet of CO pointing toward the north.
Centaur 29P’s different CO and CO2 abundances suggest that the body may be composed of different pieces that coalesced together during its formation. However, other scenarios to explain Centaur 29P’s outgassing activity are still being considered.
Watch Crew-8 return to Earth, concluding their mission to the International Space Station. Their SpaceX Dragon spacecraft is scheduled for splashdown off the coast of Florida on Friday, Oct. 25 at approximately 3:29 a.m. EDT (0729 UTC).
NASA astronauts Michael Barratt, Matthew Dominick, and Jeanette Epps and Roscosmos cosmonaut Alexander Grebenkin are coming home after seven months aboard the orbiting lab, conducting scientific experiments and technology demonstrations.
Astronauts Butch Wilmore and Suni Williams, who launched to the station aboard NASA’s Boeing Crew Flight Test (CFT) this summer, will return to Earth with the two members of NASA’s SpaceX Crew-9 mission in the spring of 2025. Learn more about CFT: https://nasa.gov/starliner-faq
The Magyars have always fascinated me, especially after their settlement of the Carpathian basin post 895 to 905. Their raids over the next 55 years reached as far as the Pyrenees and were successful enough that the Byzantine Empire and several other kingdoms chose to pay off the Magyars to gain relief from invasion. Their raids were finally brought to an end in 955 at the Battle of Augsburg when King Otto I of Germany defeated the Magyars.
🚩 If you like what you see, consider supporting my work on Patreon and you get ad-free early access to my videos for as little as $1 https://www.patreon.com/historymarche — You can also show your support by subscribing to the channel and liking the video. Thank you for watching.
📢 Narrated by David McCallion
🎼 Music: EpidemicSound Filmstro
📚 Sources: Clifford R. Backman – The Worlds of Medieval Europe. Charles R. Bowlus – The Battle of Lechfield and its Aftermath, August 955 AD. Gerhard of Augsburg – Vita Sancti Uodalrici (Life of Saint Ulrich). Tom Holland – The Forge of Christendom: The End of Days and the Epic Rise of the West. Peter Heather – The Restoration of Rome. William Weir – 50 Battles that Changed the World. Widukind of Corvey – Res Gestae Saxonicae Sive Annalium Libri Tres (Deeds of the Saxons, the Three Books of Annals). The Complete Works of Luidprand of Cremona. Transl by Paolo Squatriti. The Catholic University of America Press, Washington D.C., 2007 Reuter, Timothy. Germany in the Early Middle Ages 800–1056. (1991) Balasz, György, and Karoly Szelényi. The Magyars: The Birth of a European Nation (1989) Bóna, István. The Hungarians and Europe in the 9th-10th centuries (2000) Edwards, Sean J. A., Swarming on the Battlefield: Past, Present, and Future (2000) The Battle of Lechfeld, 910 from Antapodosis, Book II (10th c.)
Steve Spangler is a bestselling author, STEM educator and Emmy award-winning television personality with more than 2,100 television appearances to his credit. Steve appeared as a regular guest on the Ellen DeGeneres Show from 2007-2022. Learn more about Steve at https://stevespangler.com/about-steve-spangler/
In 2022 NASA’s DART spacecraft made history, and changed the Solar System forever, by impacting the Dimorphos asteroid and measurably shifting its orbit around the larger Didymos asteroid. In the process a plume of debris was thrown out into space.
The latest modelling, available on the preprint server arXiv and accepted for publication in the September volume of The Planetary Science Journal, shows how small meteoroids from that debris could eventually reach both Mars and Earth – potentially in an observable (although quite safe) manner.
Ştiai că primul profesor dedicat exclusiv fizicii în România a fost Manase Eliade?
Domnitorul Alexandru Ipsilanti a reformat Academia Domnească de la Sf. Sava în 1776 şi l-a trimis pe Manase Eliade să studieze științele în Italia și Grecia, acesta revenind cu o mașină pneumatică și una electrostatică, inovații ce au revitalizat studiul fizicii la academie.
Printre profesorii de fizică ai Academiei Domneşti, îi găsim pe grecii Rigas Velestinlis și Nichifor Theotokis, acesta din urmă contribuind cu manualul său “Elemente de fizică”, care includea teorii din Descartes și Newton.
Veniamin din Lesbos, un alt profesor influent, a propus o teorie originală privind mișcarea corpurilor și magnetismul, bazată pe energiile intrinseci ale obiectelor.
Steve Spangler is a bestselling author, STEM educator and Emmy award-winning television personality with more than 2,100 television appearances to his credit. Steve appeared as a regular guest on the Ellen DeGeneres Show from 2007-2022. Learn more about Steve at https://stevespangler.com/about-steve-spangler/
Aurelia works on VR experiences that recreate locations in space.
Sometimes, her work takes her beyond the office. Recently, Aurelia attended Gamescom , the world’s biggest video game event, where her team showcased MUSE, a VR project she helped design!
Static Electricity! That’s what’s behind lightning bolts, whether they come from the sky or are made in the lab using the power of science! Plus: Phil harnesses the power behind lightning to make things stick, float, or make your hair stand on end!
NASA+ is our ad-free, no cost, family-friendly streaming service, featuring NASA’s Emmy-award-winning live coverage and new, original video series: https://plus.nasa.gov
Our fall 2024 lineup includes: “The Color of Space,” “Other Worlds,” “Far Out,” “An Ocean in Bloom,” “Expanding Universe,” “Space Out,” “Planetary Defenders,” and “Our Alien Earth.”
NASA+ is available on most major platforms via the NASA App on iOS and Android mobile and tablet devices, streaming media players such as Roku, Apple TV, and Fire TV, and on the web across desktop and mobile devices.
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🚩In 1403, a rebellion broke out in England that would culminate in one of the bloodiest battles to ever take place on English soil. On 21 July 1403, King Henry IV with his son Hal, the future Henry V, went head to head with a Northern traitor – Henry ‘Hotspur’. The Battle of Shrewsbury would pit rebel against royalist. Englishman against Englishman. At stake was the crown of England. The lessons learned in this battle by the young Henry V would go on to prove crucial at the Battle of Agincourt in 1415, one of England’s most important triumphs in the Hundred Years’ War.
🚩 If you like what you see, consider supporting my work on Patreon and you get ad-free early access to my videos for as little as $1 https://www.patreon.com/historymarche — You can also show your support by subscribing to the channel and liking the video. Thank you for watching.
📢 Narrated by David McCallion
🎼 Music: EpidemicSound Filmstro
📚 Sources: Shrewsbury 1403: Struggle for a Fragile Crown (2017) by Dickon Whitewood. Osprey Publishing. ISBN: 9781472826794. The Fears of Henry IV: The Life of England’s Self-Made King (2007) by Ian Mortimer. Published by Jonathan Cape. ISBN: 978-0-224-07300-4. Hotspur: Henry Percy: Medieval Rebel (2022) by Andrew Boardman. First Published by Sutton Publishing Ltd (2003). ISBN: 978-1-80399-243-3.
Fast’ solar wind moves with speeds above 500 km/s. Curiously, this wind exits the Sun’s corona with lower speeds, so something speeds it up as it moves farther away. The million-degree wind naturally cools down as it expands into a larger volume and becomes less dense, much like the air on Earth as you climb a mountain. And yet, it cools more slowly than expected from this effect alone.
So, what provides the necessary energy to accelerate and heat the fastest parts of the solar wind?
Data from our Solar Orbiter and NASA’s Parker Solar Probe have provided conclusive evidence that the answer is large-scale oscillations in the Sun’s magnetic field, known as Alfvén waves.
Steve Spangler is a bestselling author, STEM educator and Emmy award-winning television personality with more than 2,100 television appearances to his credit. Steve appeared as a regular guest on the Ellen DeGeneres Show from 2007-2022. Learn more about Steve at https://stevespangler.com/about-steve-spangler/
Discover the first page of ESA Euclid’s great cosmic atlas and marvel at millions of stars and galaxies captured in pristine detail, in a huge 208-gigapixel mosaic. The mosaic covers an area of the Southern Sky more than 500 times the area of the full Moon as seen from Earth.
This video takes you through a rare sky dive. Starting from a vast cosmic panorama bedazzled by some 14 million galaxies, a series of ever-deeper zooms brings you to a crisp view of a swirling spiral galaxy, in a final image enlarged 600 times compared to the full mosaic.
Although the scenes are enticing, they are not taken for their beauty, but to help us advance our understanding of the cosmos. Many of the 14 million galaxies in the initial vista will be used to study the hidden influence of dark matter and dark energy on the Universe.
Unveiled as a teaser of the wide survey, the mosaic accounts for 1% of the area that Euclid will cover over six years, and was obtained by combining 260 observations collected in just two weeks.
This first chunk of Euclid’s survey was revealed on 15 October 2024 at the International Astronautical Congress in Milan, Italy, by ESA’s Director General Josef Aschbacher and Director of Science Carole Mundell.
————————————————— Copyright: ESA/Euclid/Euclid Consortium/NASA, CEA Paris-Saclay, image processing by J.-C. Cuillandre, E. Bertin, G. Anselmi; ESA/Gaia/DPAC; ESA/Planck Collaboration —————————————————
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00:00:00 – Viteza luminii poate fi depășită! 00:00:55 – Fotografia celei mai timpurii galaxii din Univers!!! 00:01:57 – Panspermia. 00:03:23 – Aurore boreale în România! 00:04:07 – Hyperion unul dintre sateliţii planetei Saturn 00:06:10 – Ultimul Strămoș Comun Universal: LUCA! 00:08:09 – Știai asta?
#stiinta #fizica #science #tehnologie #technology #cristianpresura #ad algoritm:”Viteza luminii poate fi depășită! Deși în vid viteza luminii este constantă, aceasta încetinește în alte medii. În apă, viteza luminii scade de 1,3 ori, iar în materiale special construite poate fi redusă și mai mult. În 1999, oamenii de știință au încetinit lumina până la 60 km/h într-un gaz de sodiu răcit la aproape zero absolut. În 2003, lumina a fost încetinită la 1,5 km/h, iar în 2013, cercetătorii au reușit să o oprească complet pentru 1,5 secunde. În vid, însă, viteza luminii nu poate fi depășită fără a încălca legile fizicii.
Galaxia JADES este una dintre cele mai vechi galaxii observate vreodată, formată la mai puțin de 300 de milioane de ani după Big Bang. Această galaxie are deja de câteva sute de milioane de ori masa Soarelui, iar formarea sa rapidă ridică semne de întrebare cu privire la modelele actuale despre evoluția galaxiilor. Elementele grele găsite în această galaxie, cum ar fi oxigenul și praful, sugerează că mai multe generații de stele au trăit și murit în scurt timp.
Teoria panspermiei explorează ideea că viața ar fi putut începe în spațiu și ar fi ajuns pe Pământ prin meteoriți sau comete. În laborator, oamenii de știință au simulat condiții din spațiu și au demonstrat că precursori ai aminoacizilor pot fi formați în astfel de condiții. Glicina, un aminoacid simplu, a fost detectată în nori interstelari, sugerând că elementele esențiale pentru viață ar putea avea o origine extraterestră.
LUCA (Ultimul Strămoș Comun Universal) este un organism ipotetic care ar fi trăit acum 4,2 miliarde de ani și este considerat strămoșul comun al tuturor formelor de viață de pe Pământ. LUCA ar fi fost un organism simplu, asemănător procariotelor, și ar fi trăit într-un mediu extrem de ostil. Cercetările genetice sugerează că LUCA avea un sistem imunitar primitiv pentru a lupta împotriva virusurilor din acea perioadă.
Aurorele boreale în România au devenit mai frecvente datorită activității solare intense. Soarele se apropie de maximul ciclului său de 11 ani, ceea ce a provocat recent o erupție solară puternică. Culoarea roșie a aurorelor este cauzată de particulele din vântul solar care interacționează cu atomii de oxigen din atmosferă.
Hyperion, unul dintre sateliții planetei Saturn, are o suprafață unică, acoperită cu cratere adânci care îl fac să pară ca un burete uriaș. Această structură ciudată ar putea fi rezultatul unui impact masiv care a distrus un alt satelit, lăsând în urmă o grămadă de moloz cu densitate redusă. Hyperion se rostogolește haotic în jurul lui Saturn, ceea ce face dificilă aterizarea pe el.”
“New things are possible—more things are possible—because we are going together. And we’re going together, as nations, now more than ever before.”
NASA Administrator Bill Nelson speaks to the power, the promise, and the potential of NASA’s international partnerships, and how those partnerships help humanity reach new possibilities.
Credit: NASA Producer: Shane Apple Music: Universal Production Music
Data collected using the NASA/ESA/CSA James Webb Space Telescope, combined with earlier observations from the NASA/ESA Hubble Space Telescope, show surprisingly little methane (CH4) in the atmosphere of WASP-107 b, indicating that the interior of the planet must be significantly hotter and the core much more massive than previously estimated.
📹 ESA – European Space Agency 📸 NASA, ESA, CSA, R. Crawford
