All posts tagged: Cosmic

New Cosmic Surveys Reveal Unexpected Clues About Universe’s Evolution

New Cosmic Surveys Reveal Unexpected Clues About Universe’s Evolution

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New research examining data from two major cosmic surveys indicates that the universe may have evolved in a way that is more complex than previously thought. A team led by Joshua Kim and Mathew Madhavacheril at the University of Pennsylvania, in collaboration with researchers from Lawrence Berkeley National Laboratory, analysed data from the Atacama Cosmology Telescope (ACT) and the Dark Energy Spectroscopic Instrument (DESI). Their findings hint at a small discrepancy in the expected distribution of cosmic structures, particularly in the last four billion years. Cosmic Observations and Findings According to the study published in the Journal of Cosmology and Astroparticle Physics and on the preprint server arXiv, researchers combined ACT’s cosmic microwave background (CMB) lensing data with DESI’s luminous red galaxy (LRG) distribution. ACT’s observations provide insight into the early universe, measuring faint light from around 380,000 years after the Big Bang, while DESI maps the three-dimensional distribution of millions of galaxies to understand cosmic structure formation in more recent epochs. By overlaying these datasets, researchers created a comprehensive view of cosmic evolution. The …

Cosmic Rays Could Help Scientists Study Tornado Formation Through Muon Detection

Cosmic Rays Could Help Scientists Study Tornado Formation Through Muon Detection

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Efforts to understand the mechanics of tornado formation have taken an innovative turn with the exploration of cosmic rays. These high-energy particles, generated by interactions between cosmic rays and Earth’s atmosphere, are being proposed as a tool to remotely measure atmospheric pressure changes within supercell thunderstorms. This method could shed light on the low-pressure regions believed to play a critical role in the development of tornadoes. Study Details and Proposed Methods According to a study accepted by Physical Review D, muons, subatomic particles created by cosmic rays, could offer insight into the atmospheric conditions within tornadoes and supercell storms. Dr. William Luszczak, a physicist at Ohio State University, has told Science News that using these particles to monitor pressure changes from a safe distance. He explained that a detector placed up to five kilometres away could identify variations in muon intensity, which correlate with changes in air density and pressure. Computer models have demonstrated that regions of lower pressure are instrumental in tornado development. By tracking muons as they pass through these areas, researchers aim …

Five Dwarf Galaxies Found in a Rare Alignment, Challenges Current Cosmic Models

Five Dwarf Galaxies Found in a Rare Alignment, Challenges Current Cosmic Models

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Astronomers have identified a rare phenomenon involving five dwarf galaxies positioned in a near-linear arrangement, resembling a cosmic string of pearls. Located approximately 117 million light-years from Earth, these galaxies are held together by mutual gravitational forces. While some among them interact harmoniously, others are involved in a gravitational pull that disrupts their structure, stripping away gas and stars. This rare grouping raises questions about existing models of galaxy formation and evolution. Insights from Observations The study was published in November in The Astrophysical Journal Letters. As per the study, the galaxies, labelled D1 to D5, are characterised by low mass, faint luminosity, and high gas content. Despite their size, all five are undergoing active star formation, which is considered unusual for galaxies of this scale within a group. Their nearly perfect alignment further distinguishes them, making this configuration an exceptional discovery. The Sloan Digital Sky Survey (SDSS) data played a key role in identifying these galaxies, with additional data from various astronomical surveys contributing to the research. Unique Characteristics and Dynamics Space.com reports that …

Organic Molecules in Space: A Key to Understanding Life’s Cosmic Origins

Organic Molecules in Space: A Key to Understanding Life’s Cosmic Origins

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As researchers delve into the cosmos, organic molecules—the building blocks of life—emerge as a recurring theme, hinting at answers to some of science’s most profound questions. Recent studies, including data from missions like the European Space Agency’s Rosetta and NASA’s Osiris-Rex, continue to reveal the ubiquity of these compounds across the universe. According to reports, these discoveries shed light on how planets like Earth may have acquired the raw materials for life long before the Sun formed. Cosmic Origins of Organic Molecules As reported in Quanta Magazine, researchers have traced these molecules to interstellar clouds, comets and asteroids. These celestial objects serve as reservoirs for the compounds that constitute biological systems. Rosetta’s mission to comet 67P/Churyumov-Gerasimenko detected 44 distinct organic molecules, including glycine—a precursor to proteins—and dimethyl sulfide, a compound associated with biological activity on Earth. Such findings emphasise that life’s precursors existed in space long before planets formed. Asteroids: Organic Richness Asteroids also harbor an abundance of organic materials. Studies of samples returned by Japan’s Hayabusa2 and NASA’s Osiris-Rex missions revealed tens of thousands …

MeerKAT Detects Gravitational Wave Background, Uncovering Cosmic Activity

MeerKAT Detects Gravitational Wave Background, Uncovering Cosmic Activity

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A significant breakthrough in astrophysics has been achieved, with scientists confirming the presence of a gravitational wave background—a constant vibration in the fabric of the universe. This discovery, reported in Monthly Notices of the Royal Astronomical Society, highlights that the phenomenon could be louder than previously anticipated. The findings are attributed to the MeerKAT Pulsar Timing Array, an innovative galactic-scale detector that has mapped gravitational waves with unprecedented precision, revealing a potential hot spot of activity in the Southern Hemisphere. Understanding Gravitational Waves According to the research, gravitational waves are ripples in space and time caused by massive cosmic events, such as black hole collisions. Supermassive black holes, located at the centres of galaxies, emit slow and powerful waves during galactic mergers. The MeerKAT Pulsar Timing Array utilises the predictable signals from 83 pulsars—highly dense, rapidly spinning neutron stars—to detect distortions caused by these waves. MeerKAT’s Role and Key Findings MeerKAT, a radio telescope situated in South Africa, has been instrumental in observing pulsar signals over five years. Researchers have identified a gravitational wave background …

Underwater Neutrino Telescopes Installed in Mediterranean to Study Cosmic Mysteries

Underwater Neutrino Telescopes Installed in Mediterranean to Study Cosmic Mysteries

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Efforts are underway in the Mediterranean Sea to install the underwater neutrino telescope known as KM3NeT, as reported by various sources. The telescopes are designed to detect high-energy neutrinos, subatomic particles emitted from unidentified cosmic sources. Unlike traditional telescopes, these devices rely on capturing light generated when neutrinos collide with seawater. This massive project spans a cubic kilometre of the Mediterranean and involves deploying hundreds of detector strands. The work aims to unveil new insights about the universe. Unique Design and Deployment Challenges According to experts, KM3NeT comprises two distinct telescopes featuring glass spheres, each packed with photomultiplier tubes. Simone Biagi, a physicist at Italy’s National Institute for Nuclear Physics, shared with Science News that the telescopes are situated several kilometres below the surface. Deployment involves suspending cables of sensors, resembling strands of pearls, each up to 700 metres in length. These are lowered to the seabed and gradually released to unfurl in the water. A remotely operated submersible is used to make precise connections and inspect the setup. Scientific Goals of the Project Sources …

Astronomers Spot New Cosmic Explosions 100 Times Brighter Than the Sun

Astronomers Spot New Cosmic Explosions 100 Times Brighter Than the Sun

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A new class of stellar explosions, termed “millinovas,” has been identified by scientists, according to reports. These events, described as being 100 times brighter than the Sun, were spotted during a study involving data from the Optical Gravitational Lensing Experiment (OGLE). Findings were published in The Astrophysical Journal Letters on December 12. The discovery occurred during an investigation into gravitational microlensing events to detect primordial black holes in the Milky Way’s dark matter halo. Unique Characteristics of Millinovas Millinovas were observed in the Large and Small Magellanic Clouds, satellite galaxies of the Milky Way. Twenty-eight of these cosmic phenomena have been identified, including one event, OGLE-mNOVA-11, which erupted in November 2023. The event allowed a closer analysis using instruments like the Southern African Large Telescope (SALT) and NASA’s Neil Gehrels Swift Observatory. The research revealed light emissions from helium, carbon, and nitrogen ionized atoms, with X-rays indicating temperatures exceeding 600,000 degrees Celsius. The Cause Behind These Explosions As explained by Przemek Mróz, a researcher at the University of Warsaw, in a statement, millinovas may result …

Cosmic Rays Could Erase Signs of Life on Mars, Study Reveals

Cosmic Rays Could Erase Signs of Life on Mars, Study Reveals

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A study published in Astrobiology on November 13 has revealed the challenges posed by cosmic radiation in preserving potential traces of life on Mars. Researchers simulated the effects of cosmic rays on lipids, crucial molecular structures found in cell membranes. The findings indicate that lipids deteriorate rapidly when exposed to radiation, especially in salt-rich conditions. This adds to concerns about the preservation of biosignatures in regions on Mars that were once considered the most likely to host life. As reported Anais Roussel, an astrobiologist at Georgetown University, highlighted the issue of salt-rich environments on Mars. Roussel stated to Space.com, that they go for salt-rich environments, but they could be one of the most damaging under radiation. These findings raise concerns about whether the surface of Mars, constantly exposed to cosmic radiation due to the absence of an atmospheric shield, can protect molecular evidence of ancient life. Salt and Radiation: A Double Threat Research indicated that lipids exposed to simulated cosmic rays deteriorated significantly within the equivalent of three million years, with up to half the …

Arecibo Observatory Data Helps SETI Uncover Secrets of Pulsar Signals and Cosmic Distortions

Arecibo Observatory Data Helps SETI Uncover Secrets of Pulsar Signals and Cosmic Distortions

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Years after the collapse of the Arecibo Observatory, its extensive datasets remain instrumental in advancing astronomical research. In a study led by Sofia Sheikh from the Search for Extraterrestrial Intelligence (SETI) Institute, data from the observatory was utilised to uncover new details about pulsar signals. These dense neutron stars emit beams of radiation likened to “cosmic lighthouses,” and their signals undergo distortions as they traverse the interstellar medium. Findings from this research were published in The Astrophysical Journal on November 26. Pulsar Signals and Interstellar Scintillation The study explored how pulsar signals are affected by interstellar gas and dust. Researchers investigated 23 pulsars, including six previously unstudied, revealing insights into distortive phenomena called diffractive interstellar scintillation (DISS). This phenomenon, which resembles the rippling patterns caused by light passing through water, is attributed to interactions between pulsar signals and charged particles in space. The Role of Arecibo’s Archival Data The now-defunct Arecibo radio telescope, once spanning 305 metres, collapsed in December 2020 due to cable failures. Despite its destruction, the data collected over decades continues to …

Namibian Observatory Spots Highest Energy Cosmic Electrons Opening Better Understanding of Cosmic Rays

Namibian Observatory Spots Highest Energy Cosmic Electrons Opening Better Understanding of Cosmic Rays

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After over a decade of research, the H.E.S.S. Observatory in Namibia has recorded the most energetic cosmic ray electrons ever detected, according to reports. These high-energy particles, comprising electrons and positrons, are believed to originate from intense cosmic phenomena such as supernova explosions, neutron stars, and black holes. The discovery suggests that the sources of these particles are likely to be within a few hundred light-years of the solar system. High-Energy Electron Detection Challenges The study, as per a Space.com report, highlights that these findings shed light on extreme cosmic processes. Dr Mathieu de Naurois, Deputy Director of the H.E.S.S. collaboration and a researcher at the French National Centre for Scientific Research, stated that understanding these cosmic rays allows us to unveil big particle accelerators in the universe that are often associated with the most violent phenomena. The research indicates that detecting these particles is particularly challenging due to their rarity and the difficulty in distinguishing them from other cosmic rays. Reports state that the H.E.S.S. Observatory utilised a vast telescope array designed to capture Cherenkov …