Articles tagged with Constellations
New research reveals Pleiades star cluster as core of larger structure spanning 1,950 light-years, with similar ages and chemical compositions among its members. The study uses rotation-based approach to identify stars sharing origin story.
The discovery reveals that the Pleiades is part of a sprawling stellar family, known as the Greater Pleiades Complex, with thousands of hidden siblings across the sky. By combining data from NASA's TESS and ESA's Gaia space telescope, researchers identified young stars spinning quickly, tracing the origins of the Pleiades.
Astronomers discovered a greedy white dwarf star consuming its closest celestial companion at an unprecedented rate. The study found that the super-dense white dwarf is burning brightly due to the mass transfer between the two stars, potentially leading to a massive explosion visible from Earth.
A Chinese team developed OSSMC, a modularized satellite system that tackles orbital congestion by sharing resources and collaborating globally. The system stabilizes at approximately 48,000 satellites, reducing collision risks and space debris while promoting equitable access to space resources.
A new POD method integrates ISL data with onboard BDS-3 observations to determine the orbits of LEO and MEO satellites simultaneously. The approach reduces LEO orbit errors from over 20 cm to about 1 cm, offering low-latency, high-accuracy solutions without heavy reliance on ground tracking stations.
A team of astronomers has combined cluster and variable star data from the Gaia mission to create a new map of stellar life cycles. The study shows that at least one in five stars in clusters changes brightness over time, with young clusters hosting more variety of variable stars.
The NRL's Narrow Field Imager (NFI) has captured its first light images, primarily focused on calibrating the instrument and confirming pointing accuracy. The NFI will enable scientists to study the Sun's corona in unprecedented detail, helping to understand and predict coronal mass ejections.
The NRL-developed Narrow Field Imager is a compact coronagraph that will image the transition of the Sun's atmosphere to the solar wind, gaining insights into space plasma environments. The PUNCH mission aims to improve prediction and mitigation of space weather events like coronal mass ejections.
Researchers led by Kristen McQuinn used the Webb Telescope to find that Leo P formed stars early on but stopped for a few billion years during the Epoch of Reionization. The study provides insights into the growth of low-mass structures and the processes that led to star creation.
Researchers from DTU have discovered a neutron star that rotates at an astonishing 716 times per second, making it one of the fastest-spinning objects ever observed. The neutron star is part of an X-ray binary star system and is located in the Sagittarius constellation.
Researchers at the University of Edinburgh suggest that carvings on a stone pillar at Göbekli Tepe in Turkey represent the world's oldest solar calendar, dating back to a comet strike around 10,850 BC. The V-shaped symbols may record an astronomical event that triggered changes in human civilization.
Recent satellite deployments have reached record-breaking brightness levels, posing a threat to ground-based astronomy. The addition of 400,000 satellites in the near future could completely alter the night sky.
Space-based gravitational wave observatories offer longer arm lengths, enabling detection of low-frequency GWs. Configuration design and stability control are key factors for success, with geocentric configurations showing promise due to their simplicity and ease of deployment.
A new Ka-band CMOS phased-array transmitter has been designed for small satellites, achieving 63.8 dBm equivalent isotropically radiated power with a 62% reduction in power consumption compared to state-of-the-art transmitters. The design uses an active hybrid coupler to select transmission modes and save power.
A recent study has identified common and unique cellular processes in six neurodegenerative diseases, providing new insights into the underlying causes of these conditions. The research used machine learning analysis to compare RNA markers in whole blood samples from patients with distinct diseases, revealing eight shared themes across...
Astronomers used the Webb Space Telescope's near-infrared camera to analyze images of the Cosmic Cliffs region in NGC 3324. The discovery reveals telltale signs from two dozen previously unseen young stars, with many appearing to be protostars that will eventually become low-mass stars like Earth's sun.
Researchers deciphered descriptions of four constellations from the Hipparchus Star Catalogue, refuting a long-held idea about its relation to Claudius Ptolemy's catalogue. The study confirms Hipparchus' data as accurate to the nearest degree, making it a significant advancement in reconstructing the ancient astronomical text.
A new surveillance constellation concept aims to detect and track near-Earth asteroids, providing early warning and tracking capabilities. The system consists of six space-based surveyors and a mothership, which work together to monitor the orbits of potentially hazardous asteroids.
Researchers uncovered a unique story behind Marra Wonga rock art site, featuring animal tracks, lines, grooves, and hand-related stencils. The site's composition appears to be linked to the Seven Sisters Dreaming story, with designs spread across the length in a particular order.
The development of LEO mega constellations has significantly impacted human scientific progress in communication, navigation, and remote sensing. However, unrestrained deployment poses a threat to spacecraft safety and space environment stability, requiring rational surveillance and governance mechanisms.
University of Arizona students developed a comprehensive study to track and characterize the brightness of satellites. The team's work could help astronomers adapt by closing their telescopes' shutters during incoming bright satellites.
The review paper analyzed research advancements in data acquisition, target recognition, and monitoring for space situational awareness. The author emphasized the importance of comprehensive reviews and identified emerging trends in multiagent and synergetic constellation technologies.
Researchers have solved the 900-year-old mystery of the Chinese supernova of 1181AD by identifying a matching nebula and star in the Milky Way. The Pa30 nebula, surrounding Parker's Star, matches the profile, location, and age of the historic supernova.
Astronomers have explained Betelgeuse's sudden dimming by a cloud of dust formed from stardust, which temporarily blocked the star's light. The discovery was made using new images taken with the European Southern Observatory's Very Large Telescope.
Researchers at Skoltech's Space Center have developed an algorithm to measure the geomagnetic field using CubeSats in a tetrahedral orbital formation. The system uses Kriging interpolation to predict magnetic field values, enabling improved attitude control and station-keeping systems.
Scientists have found a way to characterize the degree of quantumness in physical systems, which is essential for understanding quantum computing and sensing advantages. By analyzing extrema states, researchers identified a mathematical representation called Majorana constellation, which covers more of the sphere as quantumness increases.
A new observational study reveals that the GW-Orionis triple-star system's disk is misaligned due to disk tearing, which could lead to planetary systems with oblique or retrograde orbits. The study provides a three-dimensional model and simulation of the system, reproducing its highly deformed disk and misaligned rings.
The BRITE Constellation has recorded a complete nova eruption, offering a unique perspective on the phenomenon. The data provides valuable insights into shock-powered optical emission in novae, shedding light on the underlying mechanisms of star explosions.
Researchers at Cornell University have discovered a way to make four-satellite constellations possible, enabling advances in telecommunication, navigation, and remote sensing. The new design harnesses energy from gravitational and solar radiation forces, reducing propellant needs and extending lifespan.
Researchers propose inventory control method to efficiently swap out broken satellites, ensuring continuous global coverage. The 'warehouse strategy' utilizes lower-altitude parking orbits and batch launches to minimize costs and maximize efficiency.
The catalog includes 17 short and 169 long bursts, providing fresh insights into how gamma-ray bursts work. Astronomers can distinguish the two GRB classes by the duration of their lower-energy gamma rays, revealing clues to the physical mechanisms at play.
A low-pressure system in the Gulf of Campeche brought heavy rainfall to southeast Texas and southern Louisiana, with flash flooding reported throughout the Houston area. The National Weather Service predicts a high risk for flash flooding across parts of the region, with rainfall totals expected to reach 3-7 inches.
The Hubble Space Telescope has captured a breathtaking image of NGC 2903, a nearby spiral galaxy. The study aims to understand the relationship between a galaxy's central black hole and its rugby-ball-shaped bulge.
Astronomers estimate that Messier 11 formed 220 million years ago and will disperse in a few million years as its stars are ejected by stronger gravitational forces.
The Upper Guadiato Archaeological Ager Mellariensis project has analyzed 49 km2 of the territory containing ancient Roman city Mellaria using the COSMO-SkyMed constellation. The satellite technology has revealed invisible moist and floodable areas, groundwater flow, and lost medieval roads.
A study at the University of Illinois explores cost-effective options for providing global broadband services by launching satellites into orbit. The research suggests designing a satellite constellation that provides regional coverage first, then expands stage by stage to maximize profit.
Heavy seasonal rainfall caused by NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) revealed severe flooding in Kenya, displacing over 244,000 people. The estimated death toll from flooding and mudslides has been increased to about 100 people.
GOES satellites help track thunderstorms, tornadoes, hurricanes, and flash floods, while also supporting search and rescue efforts through their transponders,
Cloud detection by satellites MODIS, CALIPSO, AIRS and CloudSAT onboard A-Train satellite constellation during severe haze episodes in winter 2015-2016 found haze impacts cloud observation. MODIS misclassified aerosol as cloud, suggesting caution when using its cloud product
Tropical Storm Cindy brought significant rainfall to the Gulf Coast region, with estimated totals ranging from 6.80 inches in Prattville, Alabama, to 12.30 inches in Ocean Springs, Mississippi. The majority of heavy rainfall was located east of Cindy's center, affecting states along the Gulf Coast and surrounding areas.
The Hubble Space Telescope has imaged two galaxies in close proximity, each traveling at approximately 2 million kilometers per hour. Their interaction will cause distortions and changes to the structures of both galaxies due to gravitational forces.
Astronomers have discovered a unique star in the constellation of Lacerta, which is millions of times closer to Earth than the galaxy NGC 7250, allowing it to overpower its light
Heavy rainfall in Mocoa, Colombia triggered devastating flooding and mudslides that killed over 250 people. NASA's GPM mission provided crucial data on precipitation from its orbit, helping estimate the amount of rain that fell near the affected area.
Researchers have discovered a repeating one-per-cent spike in the light of Iota Orionis, a binary star system with a mass 35 times that of the Sun. The unusual variation is caused by the gravitational interaction between the two stars, triggering quakes that allow astronomers to probe the star's inner workings.
NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) estimated record-breaking rainfall totals over the western United States from January 17 to 24, 2017. Rainfall of almost 4 inches in one day was reported in Long Beach, California, causing flooding and mudslides.
The galaxy RX J1140.1+0307 has a supermassive black hole with one of the lowest known masses, yet its emission spectrum cannot be explained by current models. Scientists believe other mechanisms are at play in the interactions between the inner and outer parts of the accretion disk surrounding the black hole.
Severe thunderstorms spawned tornadoes and generated flooding rainfall over the Southeast, with up to a foot of rain falling in five days. At least 13 deaths were blamed on the violent weather, according to NASA's Integrated Multi-satellite Retrievals for GPM (IMERG) program.
Heavy rainfall over Hispaniola led to widespread flooding in the northern Dominican Republic, with rainfall totals exceeding 230 mm. NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) data revealed the extent of the flooding, which was caused by slow-moving frontal systems and a tropical wave.
Tropical Storm Darby brought extremely heavy rainfall to northern Oahu, with estimated totals reaching up to 480 mm. The storm's track led to flash flooding and lightning damage on the island of Oahu.
NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) data revealed extreme rainfall in West Virginia during June 20-26, 2016, with 12.6 inches reported in affected areas., The IMERG analysis also showed heavy rain producing thunderstorms, causing flash flooding in the region.
Astronomers at Indiana University have discovered a small blue galaxy, Leoncino, which contains the lowest level of heavy chemical elements (metals) ever observed in a gravitationally bound system. This finding is exciting as it could help contribute to a quantitative test of the Big Bang theory.
Heaviest rainfall in the southern US was reported over 24 inches in Monroe, Louisiana, with over 4,958 homes damaged by flooding. NASA's TMPA analysis revealed a merged satellite rainfall image showing heavy rain stretching from northern Louisiana to south central Arkansas.
Heavy rainfall caused flooding and landslides in northern Peru, with NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) measuring extreme rainfall totals of over 700 mm. The strong El Niño was partially blamed for the abnormally high rainfall.
Researchers at Columbia University have won a design competition to reimagine a future cemetery using architectural and technological innovations. The 'Sylvan Constellation' proposal envisions a network of memorial vessels transforming biomass into a perpetually renewing constellation of light.
Researchers at National Oceanography Centre use GPS reflections to measure sea surface height from space for the first time. This technique provides a new way to monitor ocean currents by detecting variations in sea surface height caused by currents.
Typhoon Melor brought heavy rainfall to the Philippines, with northeastern Luzon experiencing over 771 mm of rain. The central region received nearly three feet of rain, surpassing initial estimates.
Researchers at Colorado State University are developing smaller satellites called CubeSats to monitor storms and clouds. The project aims to demonstrate real-time storm observation and take thousands of images inside clouds to improve understanding of precipitation processes.
Hurricane Sandra's rainfall was extensively studied using NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) data. The analysis showed that the hurricane produced over 700 mm of rainfall in an area northeast of Puerto Vallarta, Mexico.
Heavy flooding in southeastern India has caused at least 70 reported deaths, with Chennai experiencing exceptionally high casualties. NASA's Integrated Multi-satellite Retrievals for GPM (IMERG) data indicate rainfall totals of over 200mm in large areas of Tamil Nadu and northern Sri Lanka.
Astronomers discovered jets of material ejected by still-forming young brown dwarfs, confirming they form through a scaled-down version of star formation. The presence of these jets was detected by the VLA and confirmed with Spitzer and Herschel space telescopes.