Articles tagged with Planet Earth
The European Space Agency's Cluster satellites have observed small-scale vortex turbulence, previously predicted by mathematical models, in the plasma surrounding Earth. The discovery has significant implications for understanding solar activity and its effects on our planet.
A study of the Haughton Impact Crater has revealed life-friendly features at ground zero, including hydrothermal systems and blasted rocks that are easier for microbes to inhabit. The crater's unique geology makes it a prime target in the search for signs of past or present life on Mars.
A new model suggests that the transition from a hydrogen-rich atmosphere to an oxygen-rich one occurred approximately 2.4 billion years ago, driven by the escape of hydrogen atoms into space. This allowed free oxygen to oxidize the crust and eventually dominate the atmosphere.
Researchers reassess the Hayward fault threat to San Francisco, predict space weather by watching the Sun, and discover a rock-solid source for Martian methane. A large shaking vehicle study found the Hayward fault is angled at 70 degrees to the east, potentially leading to unexpected earthquakes.
The KamLAND experiment detects geoneutrinos produced in the Earth's interior through uranium and thorium decay. This discovery provides an assay of the planet's total radioactivity, shedding light on terrestrial heat sources.
Scientists have detected geoneutrinos using the KamLAND detector, providing crude information about the chemistry of uranium and thorium isotopes. This detection offers a new window into the Earth's interior, doubling the number of tools available for studying the planet's composition and structure.
Scientists captured T waves from the Sumatra earthquake using underwater microphones at Diego Garcia, providing a direct look at the entirety of the large underwater event. The study reveals two phases: faster rupture to the south and slower to the north, with implications for tsunami risk and emergency relief.
Astronomers discover a young star with unprecedented amounts of warm dust near its orbit, where Earth-like planets are most likely to exist. The team believes this could be the result of a massive collision between planet-size objects, potentially forming conditions similar to our own solar system.
A new study by Arizona State University reveals Mars' surface minerals using THEMIS and TES data, yielding surprising results in localized areas. The findings show that Mars has evolved and continues to evolve beneath its surface, similar to Earth, with diverse igneous mineral types rivaling those found on our planet.
A Brown University geologist is part of a joint space mission to study a comet's composition. The Deep Impact mission will provide a first-ever look inside a comet when an impactor hits Tempel 1, helping scientists understand how comets shaped the solar system.
Researchers find high levels of 142Nd in terrestrial rocks, contradicting earlier theories on Earth's formation. This discovery suggests that the planet underwent a violent history of collisions and radioactive heat release, leading to its chemical differentiation.
The newly discovered planet, orbiting Gliese 876, is the smallest and first rocky terrestrial planet found around a normal star. Its surface temperature may be too hot for life as we know it due to its close proximity to the star.
MESSENGER successfully tested its main camera by snapping distant approach shots of Earth and the Moon. The images show bands of clouds between North and South America on Earth's sunlit side, providing valuable data for planetary exploration.
Astronomers have detected a planet in a solar system 15,000 light years from Earth, one of the most distant ever discovered. The discovery was made possible by a technique called gravitational microlensing, which involves monitoring the brightness of a star as a massive object in space passes in front of it.
Scientists developed a new method to image the earth's rupture during the Dec. 26 Indian Ocean earthquake, providing a fresh perspective on the massive event. The technique uses first-arriving seismic waves to create detailed images in under 30 minutes, which could be used for public-warning and tsunami-alert systems.
A massive solar flare on January 20, 2024, produced the largest solar radiation signal in nearly 50 years, tripping radiation monitors worldwide and scrambling spacecraft detectors. The event challenged traditional theories about proton storms at Earth, suggesting that protons may have originated from the sun itself.
Scientists analyzed data from the 2004 Indian Ocean earthquake, revealing a catastrophic event that highlights the need for more extreme worst-case seismic forecasts. The earthquake's impact was exacerbated by its location, which coincided with a popular holiday and high tide, resulting in widespread damage and loss of life.
The study provides a comprehensive analysis of the earthquakes, including the longest fault rupture and duration of faulting, as well as the seismic waves that traveled around the globe. The researchers also found that the earthquake caused the planet to vibrate with 'free oscillations,' like the ringing of a bell.
Scientists led by Professor Jeffrey J. Park have detected the natural tones from seismograms after the Sumatra-Andaman earthquake, providing information on Earth's deep mantle and core. The data supports a model of the earthquake that lasted about 10 minutes, with massive slabs of rock moving over 800 miles.
Researchers estimated that the quake caused a massive 5-20 meter displacement along the 1,300-kilometer fault, leading to significant rearrangement of the Earth's surface. The tremors triggered devastating tsunamis killing over 300,000 people across Southeast Asia.
Scientists from Oregon State University have discovered new theories about Mars' climate and polar regions, shedding light on the mystery of the planet's icecaps. The study reveals that the southern pole's permanent icecap is comprised primarily of carbon dioxide ice, which could indicate global climate change.
Researchers using Cassini-Huygens Spacecraft measured Titan's temperature, winds, and chemical composition, finding methane abundance and seasonal changes comparable to Earth's. The study suggests Titan's organic chemistry is an analog of early terrestrial processes, potentially hinting at the moon's habitability.
A new study reveals that Coronal Mass Ejections (CMEs) can originate from tiny magnetic regions on the Sun, challenging current theories. The research used data from NASA/ESA's SOHO spacecraft and found that these mini-CMEs were energetic enough to reach Earth, causing aurora and disrupting satellite communications.
Research on Earth's albedo is facing a lack of funding and resources, hindering scientists' understanding of its effects on climate change. Albedo makes up half the equation for understanding the planet's energy budget, but its impact could be off by as much as 100 percent.
A significant gap exists in understanding Earth's energy balance, crucial for accurately determining climate change. Scientists call for improved research observations and models to describe the overall energy balance of Earth's system.
A new study confirms the Earth's energy is out of balance, with more energy absorbed from the sun than emitted back to space. The imbalance, measured at 0.85 watts per meter squared, will cause an additional 0.6 degrees Celsius warming by the end of this century.
A recent study confirms that the Earth's energy is out of balance, with an imbalance of 0.85 watts per meter squared causing a significant impact on global temperatures. The study also reveals that warmer waters will lead to accelerated ice sheet disintegration and sea level rise.
K-State professor Chris Culbertson is working with NASA to develop microfluidic devices that can monitor astronaut health remotely. These devices use miniaturized chemical analysis instrumentation to analyze DNA mutation rates in cells on orbit.
Researchers have refined the estimated lifetime of the solar nebula to roughly 2 million years, based on analysis of chondrules and Calcium Aluminum-rich inclusions found in the Allende meteorite. This finding suggests that oxygen was evolving rapidly during this period.
A study by University of Warwick researchers has shown that the solar wind density behaves like a turbulent stream, not a passive scalar as previously thought. This discovery will impact our understanding of turbulence in complex systems such as climate change and weather patterns.
Researchers used advanced supercomputing technology and chemical analysis to reconstruct past sea temperatures, finding that increased levels of CO2 in the atmosphere initiated warming. This breakthrough sheds light on how climate may respond to greenhouse gas emissions in the future.
Research by Dr. Michael Murphy suggests that the fine structure constant, governing electromagnetic forces, may have changed over time by about one part in two-hundred-thousand during the last 10 billion years. This finding challenges existing knowledge and could have significant implications for our understanding of the universe.
Researchers propose alternative explanation for fault formation at mid-ocean ridges, citing role of magma and rotation of faults. The study suggests that large offset 'oceanic core complex' faults may form due to bending of lithosphere, contradicting the previous standard model.
A new study suggests that up to 40% of the early Earth's atmosphere was composed of hydrogen, creating a more favorable climate for the production of pre-biotic organic compounds. This finding contradicts traditional models and supports the idea that life may have emerged earlier than previously thought.
Scientists found that auroral ovals in the northern and southern hemispheres do not form mirror images, contrary to previous thought. The study suggests that the tilt of the Earth's magnetic field towards the Sun and conditions in the solar wind play a crucial role in shaping the auroras.
Researchers are creating a chemical guidebook to identify signs of microbial life in Martian rocks. The team, supported by a $900,000 grant, will use advanced mass spectrometer technology and fuzzy logic computer program to analyze spectral images and make decisions about sample selection.
A study by Woods Hole Oceanographic Institution researchers finds that variations in the Earth's axis tilt control the timing of glaciations, acting as a planetary pacemaker. The researchers developed a simple model to analyze the effects of changes in tilt on climate belts and seasons.
Scientists have developed a new method to create detailed images of the Earth's interior, improving resolution and accuracy. This technique uses ambient seismic noise, rather than earthquakes, allowing for better understanding of the planet's structure.
Researchers have developed a new method to measure surface waves from normal seismic noise, providing better resolution of the Earth's interior. This technique promises significant improvements in crust and upper mantle image quality down to 60 miles within the Earth.
The Cassini mission has captured high-resolution images of Titan, revealing a geologically young surface with signs of tectonic resurfacing and erosion by liquid hydrocarbons. The surface features complex patterns, including channels and linear boundaries, indicating ongoing geological processes.
Scientists at PNNL discovered that micron-wide dust particles encrusted with molecularly gluey ice enabled planets to bulk up quickly enough to overcome solar winds. Fluffy ice provided a cushioning effect, allowing icy grains to stick together and grow into large lumps.
Researchers captured ancient, 9-billion-year-old light from a massive galaxy cluster, providing a snapshot of the universe at 5 billion years old. The discovery confirms that galaxy clusters formed in a way consistent with recent structures.
UCSB scientists investigate seafloor hydrothermal fluid discharge to uncover insights into the origins of life on Earth. By studying subseafloor microbes and geological formations, researchers aim to understand how early life survived in a challenging environment.
A massive gamma-ray flare from a magnetar was detected by the RHESSI satellite, emitting as much energy in two-tenths of a second as the sun gives off in 250,000 years. The event's immense power suggests a solution to the origins of short-duration gamma ray bursts.
Scientists have detected over 50 gamma-ray flashes per day, with energies comparable to those emitted by black holes and neutron stars. The exact mechanism behind these bursts remains uncertain, but researchers suspect it involves lightning discharges and electric fields in the upper atmosphere.
A team of astronomers led by Clarke gathered data on Saturn's aurora using Cassini and Hubble spacecraft. Their observations revealed that Saturn's aurora differ in character from day to day, with varying lengths and behaviors compared to Earth's and Jupiter's.
Researchers at the University of Iowa have discovered a link between Saturn's radio emissions and its bright auroras. The findings indicate that strong radio emissions from Saturn's aurora are similar to those on Earth, suggesting a connection between the two.
Researchers have uncovered a new hypothesis on the origins of cyanobacteria, which gave rise to chloroplasts in plant cells. The study suggests these bacteria first emerged in freshwater systems and gradually adapted to brackish and marine environments over time.
The new CodaOctopus laboratory will map extensive areas of the sea bed using novel 3-D methods, providing visualisation for scientists and strategic decision makers. This collaboration aims to focus research on commercial requirements, developing further Cardiff University's marine reputation.
Researchers found that strong stellar winds around young red dwarfs may be responsible for removing dust and debris disks. The discovery provides a potential explanation for the rare occurrence of debris disks among red dwarfs, but further observations are needed to confirm this hypothesis.
Astronomers using the Gemini South telescope in Chile have observed new details in the dusty disk surrounding Beta Pictoris, showing a large collision between planetary-sized bodies may have occurred as recently as the past few decades. The mid-infrared observations provide evidence for energetic encounters during planetary formation.
A NYU physicist has isolated the first source of ultra-high energy cosmic particles using a new analysis technique. The discovery provides a breakthrough for cosmic ray astronomy, allowing researchers to study material particles from the distant universe in greater detail.
A 9.0 earthquake off the coast of Indonesia shifted the North Pole by centimeters and decreased the length of day by 2.68 microseconds, according to NASA scientists. The quake also slightly changed the planet's shape and affected its oblateness.
Scientists have discovered minerals in comet dust similar to those found on Earth, providing insights into the solar system's formation. The Spitzer space telescope has captured detailed images of Comet Encke, helping researchers model how comets eject particles as they orbit the sun.
Astronomers have discovered a massive debris disc surrounding the star Vega, indicating a chaotic process in planetary system evolution. The debris is thought to be the result of embryonic planets colliding and crashing into each other, creating ever-finer dust particles.
Researchers at Queen's University have discovered the mineral ikaite in ancient marine sedimentary rocks, suggesting that the ocean was colder than previously thought. The study challenges the 'Snowball Earth' hypothesis and proposes an alternative explanation for the formation of this mineral.
A new study by the University of Chicago reveals that Greenland's ancient rocks are sedimentary and not igneous, providing evidence for biological activity 3.85 billion years ago. The findings support the search for early life on Earth and open up new possibilities for research.
Researchers have discovered Cassini findings on Saturn's rings, dust impacts, and radio rotation rate variations. The study found that Saturn's lightning is one million times stronger than Earth's, with some signals linked to storm systems.
Roger Bilham warns that Iran is the worst offender, with one in 3,000 Iranians dying in an earthquake since 1900. The professor emphasizes the need for earthquake education to prevent fatalities in developing nations.
Researchers found that NASA's current guidelines, which allow for two-hour phase delays in bedtime, can lead to disruptions in sleep and alertness. The study suggests that gradual changes in sleep schedule may be more effective in minimizing negative consequences.