News
Behold, the Solar System in All its X-ray Glory
The Universe looks mighty impressive when visualized with X-ray instruments. More importantly, X-ray images provide vital scientific insights by revealing features in the Universe that are not observable in visible light. The same is true of our Solar System, which has been difficult because of the challenges of separating local emissions from the rest of the Milky Way galaxy. In a recent study, a team from the Max Planck Institute for Extraterrestrial Physics (MPE) managed, for the first time, to disentangle the X-ray glow of our Solar System from deep space.
This was based on data obtained by the extended ROentgen Survey with an Imaging Telescope Array (eROSITA), an instrument aboard the Russian-German Spectrum-Roentgen-Gamma (SRG) observatory, between 2019 and 2021. The four sky maps produced from this enabled the extraction of solar wind charge exchange (SWCX) emissions from the cosmic background, providing the clearest view of the Solar System’s soft X-ray glow to date.
The soft X-ray glow arises when highly charged solar wind ions (like carbon and oxygen) capture electrons from neutral atoms in Earth’s upper atmosphere (geocorona) and elsewhere in the heliosphere. Based on data collected between 2019 and 2021. Previously, scientists believed that the SWCX was merely signal interference since it affected every study of the X-ray sky, skewing temperature and density measurements. These are vital to cosmological models, which makes the new data vital to our understanding of how the Universe has evolved over billions of years.
Illustration of the separation of the SWCX foreground emission from the cosmic X-ray sky, for the Western Galactic hemisphere. Credit: K. Dennerl (MPE)
The SRG/eROSITA telescope enabled this through the telescope’s unique location (around the L2 Lagrange Point), which avoids X-ray interference from Earth’s geocorona. Its ability to conduct long-term observations from solar minimum onwards also allowed researchers to track changes in X-ray levels driven by solar activity. By comparing observations, the team isolated the heliospheric component and reconstructed the soft X-ray sky as it would appear from outside the Solar System.
They also enable (for the first time) the study of the heavy-ion content of the solar wind, how it variability, and its interaction with the interstellar medium (ISM). The data also revealed an evolution of X-ray emissions, with increased solar activity leading to observable changes at different latitudes. This confirms previous research showing reduced X-ray emissions around the Sun’s polar regions at solar minimum, a phenomenon known as a “polar hole” that closes as activity increases.
Further analysis of the data revealed a localized region near Earth’s orbit with enhanced X-ray emissions that doesn’t orbit the Sun. This is the result of the “interstellar breeze,” helium atoms that pass through the Solar System as it moves through the Milky Way. This confirmed yet another prediction dating back to the 1970s: that the Sun’s gravity creates a “helium focusing cone.” In essence, the Sun’s gravity bends the trajectories of these atoms, creating a concentrated stream on the “downwind” side.
By combining solar wind measurements and data on the distribution of matter in the ISM, the team produced time-resolved three-dimensional models of the SWCX emissions. This revealed that emissions originate predominantly from spiral structures driven by variations in solar wind speed, primarily within Mars’ orbit, which (when averaged over time) show the cone clearly. These findings represent a paradigm shift in soft X-ray astronomy, turning what was considered a contaminating nuisance into a powerful diagnostic tool. As team lead Konrad Dennerl noted in a MPE press release:
Tracking how the solar wind modifies the appearance of the X-ray sky over time not only allows us to clean up observations of the distant universe but also provides unprecedented insights into solar physics and heliospheric dynamics. Understanding our Solar System’s X-ray emission is the key to properly interpreting observations of the diffuse X-ray sky.
The paper describing their findings, “Determination of the Solar System contribution to the soft X-ray sky,” recently appeared in the journal Science.
Further Reading: MPE
News
California judge rebukes Trump-backed push of oil pipeline restart
In a rebuff of the Trump administration’s push to restart oil pipelines off California’s Central Coast, a state judge has ruled that a recent executive order does not override state regulations concerning oil operations.
It remains unclear exactly what effect the ruling may have on pipeline operator Sable Offshore Corp., which faces a number of legal challenges from California authorities.
Environmental groups, however, celebrated Friday’s ruling as a “win for the rule of law,” and Gov. Gavin Newsom called it a “rebuke of the Trump administration and Sable’s ploy to illegally use emergency powers to bypass California law.”
Last month, the Trump administration invoked the Defense Production Act when it directed Sable to commence operations and send crude flowing through a network of undersea and on-land oil lines. The administration argued that the order preempted several California laws, regulations and court orders, which had, for months, blocked the pipelines’ restart.
In Friday’s ruling, Santa Barbara County Superior Court Judge Donna Geck upheld a preliminary injunction issued last summer against Sable, prohibiting the pipeline system’s restart until the Houston-based company adheres to all state and local regulations.
“Nothing … permits a party subject to a [Defense Production Act] order to violate other laws,” Geck wrote in the ruling. She cited case law from two other similar federal court decisions, which “strongly implies that the [Defense Production Act] order, by itself, does not permit the violation of applicable state regulatory law.”
Experts say Geck’s ruling could signal how other judges — including in upcoming federal court cases — may rule on the Trump administration’s push to restart the pipelines.
Allan Marks, a professor at UCLA’s law school who has a background in energy law, pointed to similar challenges of the Trump administration’s meddling in offshore projects, particularly East Coast wind farms, which the courts have largely rejected.
He said Geck’s ruling followed similar logic, reaffirming “that the pipelines cannot legally be restarted without complying with state permitting requirements,” Marks said.
Sable has repeatedly clashed with state and local regulators as it has worked to restart the pipelines, which run through Santa Barbara, San Luis Obispo and Kern counties but are linked to three offshore oil rigs. The lines had sat unused since 2015, when a pipe rupture caused one of the state’s largest oil spills.
Trump officials have rushed to support the project, arguing it will increase domestic oil production, especially as gas prices soar due to the war with Iran — despite ongoing regulatory issues, including criminal charges against Sable.
Much about the project, however, remains tied up in legal challenges, including the future of a federal consent decree supposed to outline any pipeline restart and an assertion from California that the company is now trespassing through Gaviota State Park.
Geck acknowledged the other ongoing legal disputes, but said they don’t diminish the authority of the court, saying she was “deeply concerned with noncompliance with the preliminary injunction.”
Sable had requested that Geck rescind the state court injunction following the executive order to restart the pipelines. The company argued the federal order preempts any requirement from California regulators, including court orders.
Geck disagreed. She will soon consider if the company should be found in contempt of court.
“This preliminary injunction is another reminder that Sable is not above the law,” said Mati Waiya, executive director for the Wishtoyo Chumash Foundation, one of the groups that sued to ensure Sable complies with environmental protections. “We will continue the fight to protect our home.”
News
Influencers Are Spinning Nicotine as a ‘Natural’ Health Hack
The influencers, many of them aligned with the Make America Healthy Again Movement, say the medical establishment has unfairly demonized the compound.
News
The Vera C. Rubin Observatory has Discovered 11,000 New Asteroids, and It’s Barely Even Started!
The Vera C. Rubin Observatory was built with an ambitious purpose in mind. As part of its 10-year Legacy Survey of Space and Time (LSST), the Rubin Observatory will gather about 30 petabytes of data. This will include creating an inventory of the Solar System, transient objects (such as supernovae and variable stars), and mapping the Milky Way. Using preliminary data gathered by the Observatory, scientists have already discovered 11,000 new asteroids in the Solar System. These results were confirmed by the International Astronomical Union’s Minor Planet Center (IAU-MPC).
This constitutes the largest single batch of asteroid discoveries in the past year. The discoveries were the result of 1 million observations spanning a month and a half, covering over 11,000 new asteroids and more than 80,000 already known asteroids. The new data was acquired as part of Rubin’s early optimization surveys and is a testament to Rubin’s sophisticated instruments. It also offers a preview of the impact Rubin will have on Solar System science once it begins the LSST campaign next year.
Mario Juric, a faculty member at the University of Washington and the Rubin Solar System Lead Scientist, explained in an official press release:
This first large submission after Rubin First Look is just the tip of the iceberg and shows that the observatory is ready. What used to take years or decades to discover, Rubin will unearth in months. We are beginning to deliver on Rubin’s promise to fundamentally reshape our inventory of the Solar System and open the door to discoveries we haven’t yet imagined.
*A rendering of the inner Solar System showing the asteroids discovered by Rubin in light teal. Known asteroids are dark blue. Credit: NSF–DOE Vera C. Rubin Observatory/NSF NOIRLab/SLAC/AURA/R/NASA/Goddard/ESA/Gaia/DPAC*
The dataset includes 33 previously unknown near-Earth objects (NEOs), the largest of which measures about 500 meters (1640 ft) in diameter. This is especially significant given that some NEOs are classified as potentially hazardous objects (PHOs), those that could impact Earth in the future. None of the newly-discovered objects poses a threat to Earth. Once fully operational, Rubin is expected to reveal nearly 90,000 new NEOs, nearly doubling the number of known NEOs larger than 140 meters to around 70%, some of which may be PHOs. This will make Rubin a vital part of planetary defense.
The dataset also includes roughly 380 trans-Neptunian objects (TNOs), two of which have extremely large, elongated orbits. At their farthest point (periapsis), these two objects (provisionally named 2025 LS2 and 2025 MX348) are roughly 1000 times farther away from the Sun than Earth. This places them among the 30 most distant minor planets known. The newly discovered objects are a significant addition to the 5,000 TNOs discovered over the past three decades, representing a significant growth in the study of these icy, distant objects.
Former MPC Director Matthew Holman, a Senior Astrophysicist at the Harvard & Smithsonian Center for Astrophysics (CfA), spearheaded the work on the TNO discovery pipeline. “Searching for a TNO is like searching for a needle in a field of haystacks — out of millions of flickering sources in the sky, teaching a computer to sift through billions of combinations and identify those that are likely to be distant worlds in our Solar System required novel algorithmic approaches,” he said.
Along with Kevin Napier, a research scientist at the CfA, Holman developed the algorithms to detect distant Solar System objects with Rubin data. “Objects like these offer a tantalizing probe of the Solar System’s outermost reaches, from telling us how the planets moved early on in the Solar System’s history, to whether a hitherto undiscovered 9th large planet may still be out there,” he added.
Orbital distribution of 11,097 newly discovered asteroids from NSF–DOE Rubin Observatory’s Early Optimization Survey. Credit: NSF–DOE Vera C. Rubin Observatory/NSF NOIRLab/SLAC/AURA/R/NASA/Goddard/ESA/Gaia/DPAC*
Ari Heinze, a research assistant at the University of Washington, built the software that enabled their detection with Jacob Kurlander, a graduate student at the University of Washington. As he noted:
Rubin’s unique observing cadence required a whole new software architecture for asteroid discovery. We built it, and it works. Even with just early, engineering-quality data, Rubin discovered 11,000 asteroids and measured more precise orbits for tens of thousands more. It seems pretty clear this observatory will revolutionize our knowledge of the asteroid belt.
The MPC’s verification of this large group of asteroids also means the entire scientific community can access the data, refine orbits, and begin analysis immediately. And these discoveries are just the beginning, given that the LSST hasn’t even started yet! Over the course of this ten-year survey, scientists expect Rubin to discover this many asteroids every two to three nights in the first few years. This will triple the census of known asteroids and increase the number of known TNOs by close to a factor of 10.
The discoveries were made possible by Rubin’s unique combination of a large mirror, its LSST digital camera (the largest ever built), and highly sophisticated software. These capabilities, along with the advanced data pipelines, are enabling the detection of faint, fast-moving objects in our Solar System. Rubin can survey the sky with roughly six times the sensitivity of most current asteroid searches, allowing it to detect smaller and more distant objects than ever before. This will improve our understanding of the Solar System and its evolutionary history.
People are encouraged to visit the Rubin Orbitviewer site and the Small Body Explorer to learn more about the newly discovered asteroids and interact with them virtually.
Further Reading: Rubin Observatory
-
Trending2 weeks agoWho Are Illinois Guard Keaton Wagler’s Parents?
-
Trending3 weeks agoPolice to charge suspect in fatal shooting of infant in Brooklyn
-
Trending2 weeks agoBill Raftery, college basketball’s poet laureate, calls 2026 Final Four
-
Trending3 weeks agoTexas Rangers 2026 Home Opener: How to watch and what to look for
-
Trending2 weeks ago
Hector Rodriguez Obituary (2026) – McAllen, TX
-
News2 weeks agoAn Aerobot With ISRU Capabilities Could Explore Venus’ Atmosphere for Years
-
News2 weeks agoIf Life Exists in Venus’ Atmosphere, It Could Have Come From Earth
-
News2 weeks ago
‘Good to be Home’: Savannah Guthrie Returns to ‘Today’
