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Wednesday, 12 March 2025
World no. 1 Axelsen crashes out early at All England Open
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'Pakistan is its worst enemy': Arthur backs Gillespie after ‘clown’ jab
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Tuesday, 11 March 2025
NASA Delays SPHEREx and PUNCH Missions Due to SpaceX Vehicle Checks
NASA's planned launch of the SPHEREx and PUNCH missions has been postponed, with a new date yet to be confirmed. Originally scheduled for 10:09 p.m. EST on March 8, the missions were set to lift off aboard a SpaceX Falcon 9 rocket from Launch Complex 4E at Vandenberg Space Force Base in California. The delay has been attributed to ongoing vehicle checkouts by SpaceX, as per an update on the company's website. The missions were planned as part of NASA's Launch Services Program, which seeks to optimise commercial launches for scientific exploration.
SPHEREx to Study the Universe's Origins
According to reports, the Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) is designed to observe infrared light from the distant universe. Unlike the James Webb Space Telescope, which focuses on high-resolution imaging of single galaxies, SPHEREx will provide a broad-scale view, mapping the sky every six months. The data collected will contribute to research on cosmic inflation and the distribution of water and organic molecules in space.
PUNCH to Examine Solar Wind and Space Weather
It is reported that the Polarimeter to Unify the Corona and Heliosphere (PUNCH) mission consists of four satellites that will monitor the transition of the Sun's outer atmosphere into the solar wind. Scientists aim to study coronal mass ejections (CMEs) and how they interact with Earth's magnetosphere. Understanding these solar phenomena is critical for predicting space weather, which can impact power grids, satellites, and astronaut safety.
A revised launch schedule is expected to be announced following the completion of SpaceX's technical evaluations.
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RCB deny MI direct entry into WPL final with win; DC through to title clash
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Monday, 10 March 2025
Rohit Sharma reveals India's 'silent hero'
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WPL 2025: Harmanpreet stars as MI beat GG by nine runs
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Sunday, 9 March 2025
What is significance of white jackets donned by Team India?
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Saturday, 8 March 2025
CT Final: Unexpected source reveals NZ's plans against India
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'Some teams win by scheduling': Ex-Pak slams India before CT final
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Liverpool extend Premier League lead to 16 points
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Friday, 7 March 2025
Enceladus' Geysers May Not Come from Underground Ocean, Study Suggests
Saturn's moon Enceladus has been a subject of scientific intrigue due to its massive water plumes, which were initially believed to be linked to an underground ocean beneath its icy crust. The idea that this ocean could sustain microbial life made it a prime target for astrobiological studies. However, new research suggests that the source of these geysers may not be the deep subsurface ocean, but rather a mushy layer within the ice shell itself. This finding challenges previous assumptions about the habitability of Enceladus and raises new questions about the mechanisms behind the moon's plumes.
New Theory on Enceladus' Geysers
According to a study published in Geophysical Research Letters, researchers from Dartmouth College propose that the plumes erupting from Enceladus may not require fractures that extend entirely through the ice shell to the underground ocean. Instead, they suggest that a slushy, salt-laden layer within the ice could act as the source of the water vapor and ice particles seen in the plumes. This theory is based on the observation that the moon's icy surface contains salts, which lower the melting point of ice, allowing it to form a semi-liquid state in certain regions.
Shear Heating and Fractures in the Ice
Scientists have pointed to "tiger stripe" fractures in the moon's southern hemisphere as key locations where these eruptions occur. The study suggests that friction between ice layers, known as shear heating, could generate enough warmth to maintain a slushy state within the ice shell. This would create a reservoir of briny water close to the surface, supplying the plumes without requiring a direct connection to the deep ocean.
Gases and Plume Composition
As per the reports, the composition of the plumes observed by NASA's Cassini spacecraft could be explained by the melting of gas-rich ice structures called clathrates. These formations trap molecular hydrogen, carbon dioxide, and methane within the ice. Partial melting of these structures could release hydrogen while retaining other gases, potentially accounting for the chemical composition detected in the plumes.
Future Investigations
While this study provides an alternative explanation for Enceladus' geysers, further research is required to determine how the slushy zone replenishes itself over time. Scientists continue to analyse Cassini's data to refine their understanding of the processes shaping the moon's icy surface and its potential for sustaining life.
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WPL: Harleen stars in Gujarat Giants' thrilling win over Delhi Capitals
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Thursday, 6 March 2025
Solar Storm to Trigger Northern Lights in US: Visibility, Timing & Impact
A solar storm is set to reach Earth tonight, with potential geomagnetic activity that could make the northern lights visible as far south as New York and Idaho. The event is the result of a coronal mass ejection (CME) from the Sun, which was recorded on March 1. The Space Weather Prediction Center (SWPC) of the National Oceanic and Atmospheric Administration (NOAA) has classified this as a G1-level geomagnetic storm, with a possibility of stronger G2 conditions. As a result, skywatchers in mid-latitudes may witness the aurora borealis in areas where the skies remain clear.
Geomagnetic Storm Forecast and Impact
According to NOAA's Space Weather Prediction Center, the CME is expected to make contact with Earth's magnetic field between March 4 and March 5. The intensity of the storm is predicted to peak between 7:00 p.m. EST and 10:00 p.m. EST on March 5. While a G1 storm is considered minor, space weather physicist Tamitha Skov has indicated that G2 storm conditions remain a possibility, increasing the chances of a more widespread auroral display.
Geomagnetic storms occur when charged particles from the Sun interact with Earth's magnetosphere, potentially affecting satellite communications, power grids, and GPS accuracy. Experts have advised that radio operators, GPS users, and drone pilots may experience signal disruptions, especially during nighttime hours when such interference is more pronounced.
Visibility and Viewing Conditions
As per reports, aurora visibility will largely depend on atmospheric clarity and light pollution levels. NOAA's storm classification system places G1 storms as minor, meaning that the northern lights will likely be seen closer to high-latitude regions. If G2 storm conditions occur, visibility could extend further south. Observers are advised to find dark locations away from city lights for the best viewing experience.
For real-time updates and forecasts, space weather monitoring agencies continue to track the storm's progression.
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