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Knowridge
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A new way to measure where the Milky Way’s dark matter is
- Scientists at the University of Alabama-Huntsville have developed a technique to use pulsars to map the distribution of dark matter in the Milky Way Galaxy.
- Pulsars, rapidly spinning compressed stellar cores, can help in dark matter mapping by revealing the wobble effect of the galaxy induced by interactions with dwarf galaxies like the Large Magellanic Cloud.
- The different tugs of gravity caused by the distribution of dark matter affect the spindown rates of pulsars, which allows scientists to infer the density and distribution of dark matter in the galaxy.
- By incorporating more data from individual pulsars, scientists expect to achieve a more accurate understanding of the distribution of dark matter in the Milky Way.
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Nasa
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Progress Cargo Craft Docks to Station Resupplying Crew
- The Progress 91 spacecraft has docked to the International Space Station, resupplying the crew with food, fuel, and supplies.
- The spacecraft arrived at the Zvezda Service module, carrying about three tons of cargo.
- It will remain docked for approximately six months before disposing of trash and re-entering Earth's atmosphere.
- For more updates, follow the space station blog and NASA's social media accounts.
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Spaceflightnow
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Live coverage: SpaceX to launch 21 Starlink satellites on Falcon 9 rocket from Cape Canaveral
- SpaceX is set to launch its first Falcon 9 rocket of the month and its first Starlink flight since reaching 5 million subscribers for the satellite internet service.
- The launch, known as the Starlink 12-20 mission, is scheduled to take place from Cape Canaveral Space Force Station on March 2 at 9:24 p.m. EST.
- The Falcon 9 first stage booster will be reused for the fifth time and will attempt to land on SpaceX's droneship after the launch.
- Among the 21 Starlink satellites on board, 13 have Direct to Cell capabilities, and SpaceX has launched over 500 of these satellites to date.
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Knowridge
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Image Credit: Knowridge
What’s the shape of the universe
- The universe can be visualized in different spaces, including 2D surfaces like a beach ball or a giant doughnut, studied through geometric topology.
- While locally the universe appears 3D, when viewed as a whole, it could be a more complex 3D space with various shapes and structures.
- Understanding all possible 2D and 3D spaces has implications in physics and astronomy, helping to determine the nature of the universe.
- The concept of higher dimensions beyond 4D, suggested by string theory, has practical applications in areas like robot motion planning.
- High-dimensional spaces play a role in solving scientific problems, from modeling planetary motion to analyzing complex datasets.
- Topology also explores the relationship of spaces, such as how knots in 3D spaces coincide with surfaces in higher dimensions.
- Mathematical knots are crucial in fields like physics, biology, and chemistry, offering insights into spatial relationships and structures.
- Studies in geometric topology pose intriguing questions like the Poincaré conjecture and the slice-ribbon conjecture, advancing knowledge of spaces.
- Topology contributes to scientific and engineering disciplines, aiming to unravel the mysteries of spaces in various dimensions for practical applications.
- Geometric topology, a complex field, continues to hold promise for understanding our world and addressing real-world challenges.
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Guardian
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Even rightwingers are mocking the ‘Epstein files’ as a lot of redacted nothing
- The Trump administration promised to declassify shocking information about Jeffrey Epstein and his associates but ended up releasing heavily redacted information that was already in the public domain.
- Influencers were given binders labeled 'The Epstein Files: Phase 1', which contained mostly old and leaked documents.
- Critics, including a Palm Beach lawyer, Spencer Kuvin, viewed the release as a publicity stunt and accused the administration of using Epstein's victims for political gain.
- The release, mocked even by right-wingers like Laura Loomer, was criticized for being unprofessional and lacking substance.
- The White House's choice of influencers to preview the information, including controversial figures like Mike Cernovich, raised eyebrows.
- The fallout from the Epstein files fiasco highlighted how the administration shifted blame to entities like the FBI and the southern district of New York, rather than taking responsibility.
- The incident also underscored the lack of accountability for Epstein's enablers and associates, with only Ghislaine Maxwell facing consequences.
- The article also mentions the Tate brothers, charged with human trafficking, landing in the US after Romania lifted travel restrictions following a request from the Trump administration.
- It discusses how some 'abortion abolitionists' are advocating for women who have abortions to face the death penalty, a stance slowly gaining mainstream attention in the US.
- Additionally, the article touches on children dying of hypothermia in Gaza, Katy Perry's upcoming space trip with Jeff Bezos, and challenges with contraceptive methods not evolving over time.
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Guardian
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Jeff Bezos takes one small step for feminism and social progress, and one giant leap for self-publicity | Sarah Manavis
- Blue Origin, owned by Jeff Bezos, will launch the first all-female commercial flight to space with Katy Perry, Gayle King, Lauren Sánchez, Kerianne Flynn, Aisha Bowe, and Amanda Nguyen aboard.
- The mission is seen as symbolically significant, especially for female empowerment and social progress, with Amanda Nguyen's flight being noted as a symbol of reconciliation between the US and Vietnam.
- The flight will be the first all-female mission into space in over 60 years, but critics view it as a dystopian and PR-driven stunt by Bezos, lacking substantial social impact.
- While the celebrities on board claim the flight will inspire future generations, criticisms argue that the significance is shallow and self-serving for Bezos.
- Bezos has faced backlash for his actions in other business ventures, such as Amazon's support for Trump and changes at the Washington Post, leading to concerns about true commitment to feminism and social progress.
- The celebrity space missions, including Bezos's, are criticized for being more about personal gain and competition in the tech industry rather than true progress or benevolence.
- Despite the attention and star-studded nature of these space missions, they are viewed as self-serving endeavors that lack meaningful impact on social progress or the world.
- Critics argue that these celebrity flights are part of a new, superficial space race driven by personal interests rather than genuine advancements benefiting society.
- While celebrities may enjoy personal and professional benefits from such flights, the overall impact is questioned, with comparisons to wish fulfilment for a billionaire's personal hobby.
- The trend of high-profile and gimmicky celebrity space flights is expected to continue, serving as a platform for companies like Blue Origin to enhance their image, albeit without substantial contributions to social progress or meaningful advancements.
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Medium
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Image Credit: Medium
Can Particle Oscillations Explain the Dynamics of the Universe More Accurately Than Time?
- Particle oscillations may potentially explain the dynamics of the universe more accurately than time.
- Oscillations of particles, such as cesium atoms, are linked to the structure of space and its spatial length.
- By basing the measurement of dynamic processes on particle oscillations, a unified model connecting quantum mechanics and general relativity can be achieved.
- This model can provide explanations for cosmic phenomena, offer new insights into dark matter and dark energy, and open discussions on the fundamental nature of time.
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Arstechnica
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SpaceX readies a redo of last month’s ill-fated Starship test flight
- SpaceX plans to launch the eighth full-scale test flight of its Starship rocket after regulatory approval.
- The test flight aims to repeat the goals that were not achieved in the failed January launch.
- Priorities include testing Starship's satellite deployment mechanism and new heat shield material.
- The launch is scheduled for Monday from SpaceX's Starbase launch facility in Texas.
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Digitaltrends
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Image Credit: Digitaltrends
Beautiful Hubble image shows the stunning colors of the Veil Nebula
- The Hubble Space Telescope captured a stunning image of the Veil Nebula, a remnant of a supernova.
- The Veil Nebula is a delicate structure composed of dust and gas, located 2,400 light-years away.
- The image highlights different elements present in the nebula, allowing scientists to study its distinct chemistry.
- Hubble's observations over several decades show the changes in the structure of the Veil Nebula.
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Nasa
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Image Credit: Nasa
Smooshing for Science: A Flat-Out Success
- NASA's Mars Perseverance rover 'smooshed' a pile of tailings named 'Green Gardens' in order to prepare a smooth area for the SHERLOC instrument, which searches for organic compounds and signs of past microbial life on Mars.
- The uppermost surface of most rocks on Mars has been exposed to UV rays and the atmosphere, making it difficult to find fresh samples for studying organic compounds.
- By compacting the drill tailings into a flat and stable patch with the rover's contact sensor, the SHERLOC instrument was able to successfully scan the fresh tailings for astrobiologically interesting minerals.
- This innovative approach demonstrates how creative thinking and problem-solving techniques maximize the scientific capabilities of the Mars Perseverance rover.
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Universe Today
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Image Credit: Universe Today
Detection of a Space Capsule Entering Earth’s Atmosphere with Distributed Acoustic Sensing (DAS)
- A recent study has recorded geophysical signals produced by a space capsule's reentry using distributed acoustic sensing (DAS) technology.
- The study was led by Dr. Carly M. Donahue and her colleagues from the Earth and Environmental Sciences Division at the Los Alamos National Laboratory (LANL).
- The researchers rapidly deployed DAS interrogators and fiber-optic cables to capture the sonic boom produced by the capsule as it entered Earth's atmosphere.
- The results of the study have implications for predicting meteor and asteroid strikes and could provide a more accurate characterization of their trajectory.
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Universe Today
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Image Credit: Universe Today
Andromeda’s Dwarf Galaxies Reveal Unique Star Formation Histories
- The Andromeda Galaxy has 36 identified dwarf galaxies, and the Hubble telescope mapped them over 1,000 orbits to study their star formation histories.
- Quenching of star formation in galaxies happens due to various factors like black hole feedback or gas stripping.
- Andromeda's dwarf galaxies exhibit unique patterns of star formation and quenching attributed to their environment.
- Research on M31 satellites' star formation histories was published in The Astrophysical Journal, with Alessandro Savino as the lead author.
- Studying dwarf galaxies around Andromeda provides insights into galaxy formation compared to Milky Way satellites.
- Observing Andromeda's dwarf galaxies challenges due to dimness, but Hubble data helps understand their evolution.
- The correlation between dwarf galaxies' star formation, mass, and proximity to Andromeda is revealed through detailed observations.
- Astronomers find that Andromeda's dwarf galaxies show different star formation patterns than Milky Way's, suggesting environmental influences.
- Color-magnitude diagrams reveal extended star formation in Andromeda's dwarf galaxies, contrary to simulations.
- Andromeda's dwarf galaxies exhibit diverse properties, indicating the need for further research to explain their unique characteristics.
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Medium
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Image Credit: Medium
Recap/Discussion: JRE #2281 Elon Musk
- The episode opens with Elon Musk showcasing the new features of Grok 3, including a 'sexy' mode and an 'unhinged' mode.
- Topics discussed include the mysterious square structure on Mars, defunding USAID, unaccounted trillions from U.S. Treasury payments, recent plane crashes, illegal immigration, and voter ID policies in New York and California.
- Elon Musk shares insights on the lack of advanced aircraft, the increasing innovation at SpaceX, and his predictions for manned Mars missions and AI surpassing human intelligence in the next few years.
- The episode ends with discussions about Elon's handling of business endeavors, political corruption, and a humorous plea to disprove accusations of being a nazi.
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Nasa
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Image Credit: Nasa
NASA Uses New Technology to Understand California Wildfires
- NASA scientists and engineers tested the Compact Fire Infrared Radiance Spectral Tracker (c-FIRST) during flights over the California wildfires in January 2025.
- c-FIRST, managed and operated by NASA's Jet Propulsion Laboratory, gathers thermal infrared images and data to study the impacts of wildfires on ecosystems.
- With the ability to capture the full temperature range across a wide area, c-FIRST provides more accurate understanding of fire behavior and crucial characteristics such as size and temperature.
- The data collected by c-FIRST can be used to estimate the likelihood of fire spread, aid firefighting agencies, and understand the recovery of ecosystems from fire events.
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Gritdaily
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Image Credit: Gritdaily
Lunar Legacy: A Book’s Journey to the Moon
- Lunar Legacy: DNA of Success, a collection of insights from entrepreneurs, is about to become one of the first literary works to rest permanently on the Moon's surface.
- The book is part of a pyramid-shaped lunar monument created by LifeShip, a company dedicated to preserving human culture and biodiversity in space.
- The mission represents a pivotal moment in commercial space exploration, highlighting the role of private enterprises in shaping humanity's reach beyond Earth.
- A livestreamed landing event on March 2, 2025, will allow people to witness Lunar Legacy's final descent to the lunar surface and gain insights from mission partners and Ben Haldeman, LifeShip's founder.
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