Deepak kumar Blogs

  In the beginning, there were just 717 galaxies in the universe © Provided by Deepak kumar blogs T he James Webb Space Telescope recently observed a patch of sky in the universe and ended up capturing over 45,000 galaxies in a single frame. But it was not always like that. But what was it like when that first light flickered from the Big Bang? A team of researchers at the University of Arizona is now utilizing the James Webb Space Telescope to delve deeper into the universe and further back in time to unravel the secrets of this cosmic evolution. At the 242nd meeting of the American Astronomical Society, the team unveiled that they have identified hundreds of galaxies that existed when the universe was a merely four per cent of its current age, less than 600 million years old. The observations were part of the JWST Advanced Deep Extragalactic Survey or JADES. "With JADES, we want to answer questions such as, 'How did the earliest galaxies assemble themselves? How fast did the...

  Complex, multicellular organisms emerged, setting the stage for the explosion of life on the planet over 500 million years ago in a time epoch known as the Ediacaran Period. But it didn't happen on its own a bigger force was at play.  Researchers have now uncovered evidence of a major change around the planet.  The magnetic field of the planet  at the time was in a highly unusual state when the macroscopic animals of the Ediacaran Period diversified and thrived.   In a new study published in the  journal Nature Communications Earth & Environment , researchers have tried to understand whether these fluctuations in Earth's ancient magnetic field led to shifts in oxygen levels. The Ediacaran Period is characterised by the breakup of the supercontinent Rodinia, and the emergence of the supercontinent Pannotia, but a bigger event was the fluctuations in oxygen levels in the oceans. This fluctuation may have been crucial to the advancement of life forms m...

  Photo: Shutterstock © Photo: Shutterstock Imagine a universe bustling with life, hidden within the vast expanse of stars and galaxies. This isn't just a scene from a sci-fi movie, but a possibility that excites scientists and space enthusiasts alike. German physicist and former astronaut Ulrich Walter is convinced of the existence of extraterrestrial life. Yet, he brings us back to Earth with a sobering thought: we may never get to say "hello" to our cosmic neighbors. Ulrich Walter, who recently turned 70, shares a fascinating yet bittersweet perspective. "There are some, but we will never meet them. We will never communicate with them ourselves. But they must exist," says Walter. “Only logic requires it, because there are an almost infinite number of other planets.” Extraterrestrial Life in Our Galaxy Is Unlikely Our home galaxy, the Milky Way, which Walter refers to as the "accessible part" of the universe, seems to be a lonely place. "We’re u...

  Geologists from MIT and Oxford University have made a groundbreaking discovery in Greenland, unearthing rocks, the natural time capsules, that offer a glimpse into Earth's ancient past.  These rocks, estimated to be about 3.7 billion years old, contain the earliest remnants of the planet's magnetic field, shedding light on its early conditions and potential implications for the emergence of life. The findings,  published in the Journal of Geophysical Research , indicate that the ancient magnetic field had a strength of at least 15 microtesla, comparable to Earth's present-day magnetic field. This revelation extends the timeline of Earth's magnetic field by an additional 200 million years, hinting at its crucial role in shaping the planet's habitability. Dr. Claire Nichols, now an associate professor at Oxford University, highlighted the significance of  Earth's magnetic field  in creating a conducive environment for life. "Our magnetic field protects us ...