Deepak kumar Blogs

  Continents have been mysteriously rising for years now. Scientists now know why E very now and then certain stable parts of the continents on Earth begin to rise and develop into some stunning topographic features. The reason why this happens has now been revealed. Scientists at the University of Southampton studied plate tectonics to find out how did this happen. They say that tectonic plates often break apart, and this triggers powerful waves deep within the Earth. This event causes continental surfaces to rise, sometimes by over a kilometre . Scientists have been trying to understand for years how these topographical features known as "escarpments" and "plateaus" come into existence. The findings published in the journal Nature are a reasult of studying the impact of global tectonic forces on landscape evolution over hundreds of millions of years.  "Scientists have long suspected that steep kilometre-high topographic features called Great Escarpments—like ...

  Life on Earth may have been fueled by a giant meteorite, four times larger than Everest, study finds S cientists have long known that asteroid impacts shaped Earth's history, most famously the one that wiped out the dinosaurs. However, researchers now suggest a lesser-known meteorite, S2, might have had an even greater impact—not in destruction but in sparking life on Earth. This massive space rock, four times the size of Mount Everest, struck the planet 3.26 billion years ago, leading to a dramatic shift in the Earth's oceans and atmosphere. Unleashing Vital Nutrients from the Deep Discovered in 2014, the meteorite crash caused extreme environmental changes. The oceans boiled, a record-breaking tsunami was unleashed, and the atmosphere heated to dangerous levels. A new study published in Proceedings of the National Academy of Sciences (PNAS) highlights how this colossal event may have stirred vital nutrients like iron and phosphorus, boosting early life. Scientists ventured ...

  NASA issues asteroid alert! Two giant airplane-sized space rocks coming very close to Earth today N ASA is tracking two asteroids passing near Earth soon. Despite their close approaches, experts confirm there’s no threat. Instead, these events offer an exciting research opportunity. Observing these objects reveals details about our solar system’s beginnings. Asteroid 2024 TB2: Large, Fascinating, and Safe The first asteroid, 2024 TB2, spans about 110 feet. This is similar in size to a small airplane. Though classified as “potentially hazardous,” it will pass safely. NASA expects it to travel 731,000 miles from Earth. At this distance, TB2 will move beyond the Moon’s orbit. Scientists look forward to studying its structure and composition. Size:  110 feet (small airplane size) Closest Approach:  731,000 miles Date:  26 October 2024 Asteroid 2007 UT3: Smaller Yet Just as Safe The second asteroid, 2007 UT3, measures about 73 feet. Comparable to TB2, it resembles a sma...

  Oldest quasars ever observed in early universe are extremely lonely S cientists peering into the early universe are baffled to see lonely quasars drifting away in the void. Quasars are one of the brightest objects in the universe. It sits at the core of a galaxy and hosts an active supermassive black hole at its centre. Black holes pull in surrounding gas and dust and blast out an enormous amount of energy. This creates extreme brightness around them Quasars are known to be surrounded by several smaller galaxies. They came into being as few as a hundred million years after the Big Bang, something that has surprised astronomers. The earliest quasars are believed to have been produced from dense regions of primordial matter.  Quasars are expected to sit in crowded fields with several galaxies around them, but a new MIT-led study says that astronomers have observed some ancient quasars that are drifting away alone in the early universe. The findings have been published in The A...

  Delhi's air still in 'very poor' zone with AQI at 354; may turn severe from Sunday N EW DELHI: Delhi continued to grapple with rising pollution on Friday as the Air Quality Index (AQI) remained in the 'very poor' category, recorded at 389 around 7:23 am, according to Central Pollution Control Board. The national capital saw a thick layer of smog shrouding the city in the morning hours.d The Air Quality Early Warning System (EWS) for Delhi, under the Union Ministry of Earth Sciences, forecasts that air quality in the city will likely remain in the ‘very poor’ category on both Saturday and Sunday. “The outlook for the following six days from Sunday suggests air quality is expected to fall within the ‘very poor’ to ‘severe’ range. Meteorological conditions remain unfavorable for effective pollutant dispersion as calm winds prevail at night,” said the EWS. Delhi’s air quality typically worsens post-Diwali due to additional emissions from firecrackers and stubble burni...

  I n a surprising discovery, astronomers have found that the intense plasma jet from the supermassive black hole in galaxy M87 might be causing nearby stars to explode more frequently. Hubble Space Telescope observations reveal that stars close to the 3,000-light-year-long jet erupt more often than stars elsewhere in the galaxy, confounding scientists searching for an explanation. Unusual Activity Near M87's Plasma Jet The supermassive black hole at the centre of the elliptical galaxy M87 fires a powerful plasma jet through space, nearly at the speed of light. This jet has been compared to the Death Star’s beam from Star Wars, but with much more destructive potential. Hubble astronomers, however, have now discovered a puzzling new effect: stars near the jet seem to be exploding more frequently. A Hubble Space Telescope image of the giant galaxy M87 shows a 3,000-light-year-long jet of plasma blasting from the galaxy’s 6.5-billion-solar-mass central black hole. (Image: NASA) A Hubb...

  NASA's Hubble Telescope captures mesmerising colourful eruption of a 'stellar volcano' T he cosmos has once again dazzled us! The Hubble Space Telescope recently revealed a striking image of two stars locked in a fascinating dance. This captivating nebula showcases the intricate relationship of these celestial neighbours, a tale centuries in the making. The hourglass-shaped nebula forms from the interaction between two distinct stars. One is a compact white dwarf, while the other is a massive red giant. This red giant is over 400 times larger than our sun and has a brightness that fluctuates over a 387-day cycle. Located about 710 light-years from Earth, this star system is called R Aquarii. It is classified as a symbiotic variable star, a term that mirrors biological symbiosis. This means two different stars exist close together and interact continuously. Explosive Outbursts: The Dynamics of Stellar Evolution The white dwarf orbits the red giant every 44 years. During th...

  The Universe in motion: Why everything in space is constantly moving H ave you ever wondered why everything in the universe seems to be in constant motion? From our planet's orbit around the sun to the rotation of galaxies, nothing in space stands still. But what drives this cosmic dance? The Origins of Universal Motion The story of movement in the universe begins at the very dawn of time, with the Big Bang. According to Edward Gomez, an astrophysicist and the education director at Las Cumbres Observatory, the universe started expanding outward from an infinitely dense point. This expansion set everything in motion, imprinting movement into the very fabric of the cosmos. As Carol Christian, an astrophysicist and outreach project scientist for the Hubble Space Telescope, explains, "The beginning was movement, and so movement has been built into the universe from the very beginning." While the universe’s expansion mainly affects vast distances, it’s not just about objects...

  A giant 500-foot, building-sized asteroid is approaching Earth at a frightening speed I n a fascinating cosmic event, NASA's Jet Propulsion Laboratory (JPL) is keeping an eye on a 500-foot asteroid set to pass by Earth on 24 October 2024. Although its size may seem concerning, experts assure us there's no risk. Instead, such encounters offer an excellent chance to study ancient space objects. These asteroids have existed since our solar system's formation. Asteroids, also known as minor planets, orbit the Sun within our solar system. They are the rocky remnants from the solar system’s beginnings, roughly 4.6 billion years ago. Unlike planets, asteroids lack atmospheres, resulting in varying sizes and structures. Many of these celestial bodies have remained unchanged since they first formed. NASA’s Role in Asteroid Observation NASA diligently tracks asteroid movements with advanced tools. This enables scientists to forecast any potential risks to Earth. Historical events, ...

  Astronomers have made a groundbreaking discovery about a mysterious supernova that lit up Earth's skies over 800 years ago.  The event, known as SN 1181,  was first observed by Chinese and Japanese astronomers in 1181 as a "guest star" that shone brightly for six months before fading away. Now, researchers have uncovered fascinating new details about this cosmic explosion and its unusual remnant. Using the powerful Keck Cosmic Web Imager in Hawaii, a team led by Tim Cunningham and Ilaria Caiazzo created an unprecedented 3D map of the supernova remnant.  They found that at the heart of the nebula lies a rare "zombie star" - the surviving core of the white dwarf that triggered the explosion. The team also discovered that the overall shape of the supernova remnant is unusually asymmetrical. (Photo: Nasa) Typically, white dwarfs are completely destroyed in such events. However, SN 1181  was a partial explosion called a Type Iax supernova , leaving behind this stel...

  massive doomsday fish caught in australia omen of an earthquake A fisherman duo have caught a "doomsday fish" with terrifying features and a bizarre head structure. The creature caught by Curtis Peterson has gone viral soon after it was shared to Fishing Australia's social media page. The gigantic fish was captured off the Melville Island coast. It was caught during a recent moonlight fishing sessions. Referring to the grand discovery NT News columnist Alex Julius said, "It's the first time I've ever heard someone land a fish like that up here. It's also very rare to land one of these fish, most being found washed up ashore already deceased." Social Media Users React The viral picture of the creature has prompted many to react and give their opinion. One user on X commented, "LMFAOO that's huge." Another user on X reacted, "Why does it have a head like a horse?" "The reason they're called doomsday fish is because wh...

  If you think black holes are the most dangerous objects in space, you’re wrong S pace is a mysterious and dangerous place. While we know that black holes can swallow up whole planets, some things are far scarier than them. Apart from black holes, various objects in the universe can pose a threat to not only our planet but the whole solar system. Here are some of the most dangerous objects and phenomena in space: Gamma-ray bursts (GRBs) Gamma-ray bursts (GRBs) are from powerful explosions observed in distant galaxies. It is believed they can vaporise anything within 200 light-years with its beams. While GRBs hitting Earth is only a hypothesis, it could be dangerous to the atmosphere and damage the ozone layer, making life vulnerable to ultraviolet radiation from the sun. Megacomet A “Megacomet” is a massive comet that can be as large as 100 miles across. The biggest-ever comet C/2014 UN271 was last seen in our solar system in 2021. It is so big that it was named a minor planet ini...