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Medium
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Shift of the Oscillation Center in a Gravitational Field: A New Perspective on Spacetime Curvature
- Classical Pendulum: Oscillates symmetrically around the center (e.g., 5/5 cm).
- Pendulum in Curved Space: The center of oscillation shifts (e.g., to 6/4 cm).
- Local Gravitational Anomalies: This effect could explain subtle deviations in the motion of objects within different gravitational fields.
- A New Perspective on Gravitational Waves: The shift in the center of oscillation could provide an alternative method for detecting and understanding gravitational waves.
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Nasa
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Image Credit: Nasa
Blue Ghost Lands on Moon
- Firefly Aerospace's Blue Ghost Mission 1 successfully landed on the Moon.
- The lunar lander safely delivered a suite of 10 NASA science and technology instruments.
- The instruments will operate on the lunar surface for approximately one lunar day.
- This is the first Moon landing for Firefly Aerospace.
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Livescience
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9 best things to see in the night sky with binoculars
- Looking up at the night sky with binoculars reveals a spectacular view of star clusters, galaxies, and nebulas, enhancing the experience.
- Key events like the total lunar eclipse on March 13-14, 2025, offer close-up viewing opportunities for the moon's surface turning reddish-pink.
- Notable sights include the Pleiades cluster, Orion's Sword with the Orion Nebula, and the distinctive 'S' shape in Orion's Belt.
- The Hyades Cluster in Taurus, visible between January and April, offers a V-shape of stars revealing hundreds when viewed closely with binoculars.
- 2025 presents opportunities to observe the sun, including sunspots during its peak activity and a partial solar eclipse on March 29.
- The Beehive Cluster in Cancer, Andromeda Galaxy, and intriguing double star Mizar and Alcor, known as the 'horse and rider,' are recommended targets.
- For best visibility, explore these celestial wonders with high-quality binoculars like 8x42, 7x50, or 10x50 models.
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Nasa
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X-ray Signal Points to Destroyed Planet, Chandra Finds
- A white dwarf at the center of a planetary nebula may have destroyed a planet, explaining a mysterious X-ray signal detected from the Helix Nebula over 40 years.
- Composite image with X-rays from Chandra, optical data from Hubble, infrared data from ESO, and ultraviolet data from GALEX indicates the white dwarf at the Helix Nebula destroyed a closely orbiting planet.
- Debris from the destroyed planet will form a disk around the white dwarf, creating the X-ray signal astronomers have detected for decades.
- X-ray missions dating back to 1980 have observed unusual readings from the white dwarf at the center of the Helix Nebula, named WD 2226-210.
- WD 2226-210 exhibits similarities in X-ray behavior to other white dwarfs, possibly constituting a new class of variable objects.
- Observations suggest a planet in an extremely close orbit around WD 2226-210, with a regular change in X-ray signal every 2.9 hours.
- The X-ray signal could be debris from a destroyed planet being pulled onto the white dwarf, a first observed case in a planetary nebula.
- A paper detailing these findings is published in The Monthly Notices of the Royal Astronomical Society.
- This discovery may shed light on the fate of planetary systems as stars evolve, potentially providing insights into Earth's distant future.
- The study authors include researchers from institutions like the National Autonomous University of Mexico and the Institute of Astrophysics of Andalusia.
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Nasa
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How NASA Employee Went from Rock Climbing to Rocket Propulsion
- Jason Hopper, a NASA employee, started his journey by assessing risks and reading a rocket propulsion textbook while rock climbing at Mississippi State University.
- He was introduced to NASA's Stennis Space Center by a fellow student, leading him to a career in rocket propulsion testing.
- Hopper transitioned from a contractor to a civil servant at NASA in 2011, serving as a test conductor and later becoming a risk manager.
- His contributions include working on the J-2X engine test program, the SLS core stage hot fire, and projects at the E Test Complex.
- NASA Stennis, where Hopper works, is known for its excellence in rocket propulsion testing, supporting both government and commercial projects.
- Hopper emphasizes the importance of addressing high-risk items to maintain national test capabilities vital for space exploration.
- He oversees propulsion test capabilities at multiple NASA facilities, ensuring safe and efficient testing for space exploration and technology development.
- Hopper looks forward to redefining NASA Stennis' role, shifting towards a supportive role for commercial companies in space exploration.
- His work is focused on maintaining test facilities that enable safe and cost-effective rocket propulsion tests, supporting advancements in space technology.
- Hopper's journey from rock climbing to contributing to NASA's rocket propulsion efforts exemplifies the impact of taking risks and exploring new opportunities.
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TechCrunch
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Polish space agency says it’s investigating a cyberattack
- Poland's space agency (POLSA) is investigating a cyberattack on its IT infrastructure.
- POLSA disconnected its network from the internet after detecting the attack and its website remains offline.
- The nature of the cyberattack is still unknown and state cybersecurity services are working to identify the perpetrators.
- Poland has previously reported being the most attacked country in the European Union, with Russia being attributed as the source of many incidents.
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Metro
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Image Credit: Metro
When and where you could see the Northern Lights in the UK tonight
- The Northern Lights might be visible as far south as Norfolk if they appear in the skies above the UK tonight.
- If the aurora borealis does appear, it will peak around midnight tonight. You could see it as early as 9pm or as late as 2am.
- Places more suitable for viewing the Northern Lights are Scotland, large parts of the north of England, and potentially as far south as the north of Norfolk.
- Dark, rural areas on the north coast, such as the North Sea beach near Inverness, are ideal for spotting the Northern Lights.
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Earthsky
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Image Credit: Earthsky
Solar system passed through Orion, says intriguing new study
- Our solar system passed through a star-forming region in the direction of the Orion constellation around 14 million years ago.
- During this passage, the solar system traversed the Radcliffe Wave, a gaseous structure in the Orion Arm of the Milky Way known for its stellar nurseries.
- The journey coincided with the Middle Miocene Climate Transition, potentially impacting Earth's climate through interstellar dust influx.
- The findings were published in Astronomy & Astrophysics on February 11, 2025, revealing the solar system's encounter with higher gas density.
- Scientists used Gaia mission data to trace the solar system's path through the Orion region, passing star clusters like NGC 1977 and NGC 1981.
- The compression of the heliosphere during the passage could have increased interstellar dust influx on Earth.
- Traces of radioactive elements originating from supernovae may exist in Earth's geological record due to this event.
- The passage through the Orion region roughly 14 million years ago coincided with a climate shift, though the exact impact is still under investigation.
- While the contribution of interstellar dust to Earth's climate transition is being explored, it's noted that the current climate change differs significantly in timescales and causes.
- This event highlights the potential influence of interstellar encounters on planetary climate over extended periods.
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Livescience
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Image Credit: Livescience
Where will the 'Blood Moon' total lunar eclipse be visible in March 2025?
- The total lunar eclipse occurring on March 13-14, 2025, will be visible primarily from North America, South America, and parts of Europe and East Asia.
- The eclipse will last over six hours, with different phases including penumbral, partial, and totality.
- The spectacle of the 'Blood Moon' turning reddish is expected to last for 65 minutes during totality.
- North America, South America, and Oceania will have the best views, with Europe and Africa seeing partial phases at moonset.
- In the U.S., all time zones will experience different eclipse phases, with even Hawaii and Alaska catching a glimpse.
- Europe, especially Western locations like the U.K., Spain, and France, will witness parts of the eclipse as the moon sets early on March 14.
- Locations in Iceland and Greenland will have a better view of the eclipse in comparison to most parts of Europe.
- Clear skies are crucial for visibility during the eclipse, with western U.S., Canada, and parts of South America having better chances of clear skies.
- The eclipse will be safe to observe throughout its duration, offering a leisurely and captivating celestial event.
- Details on how to watch the lunar eclipse online will be provided closer to the event date by Space.com.
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Earthsky
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Image Credit: Earthsky
Vacation-style beaches on Mars? New evidence for lost ocean
- Evidence continues to suggest the presence of a now dried-out ocean basin in the vast lowlands of Mars' northern hemisphere.
- Data from China's Zhurong rover revealed subsurface layers similar to Earth's coastlines, supporting the existence of an ancient ocean and beaches on Mars.
- International researchers, backed by the latest findings from Zhurong's mission, indicate the likelihood of a past Martian ocean and sunny, sandy beaches.
- A new study, including researchers from Pennsylvania State University, published in the Proceedings of the National Academy of Sciences, supports the concept of a huge ocean in Mars' northern hemisphere.
- The evidence suggests that Mars once had an ocean with sandy beaches and gentle waves, resembling terrestrial coastlines.
- The Zhurong rover discovered buried layered structures resembling foreshore deposits, which require waves and tides to form, hinting at dynamic air-water interactions indicative of habitable environments.
- Researchers found similarities in the Martian deposits to terrestrial beaches, ruling out other explanations such as rivers, wind, or volcanic activity for the formations.
- The findings also shed light on Mars' evolutionary landscape, showing changes in ancient shorelines over time, providing insight into potential past habitability and the search for evidence of prior life.
- Scientists contemplate the Martian dichotomy, with the lowlands possibly being an ancient ocean basin, offering clues to Mars' geological history and the presence of vacation-style beaches in its distant past.
- The study affirms the existence of ancient coastal deposits on Mars and supports the notion of a lost ocean world on the red planet, featuring beaches ideal for inter-planetary vacations.
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Digitaltrends
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Image Credit: Digitaltrends
Problems with Starship force SpaceX to call off test flight at the last minute
- SpaceX's test flight of the Starship was called off in the final minute before takeoff.
- The launch was scrubbed due to issues with both the first stage and upper stage of the rocket.
- SpaceX CEO Elon Musk mentioned there were concerns about the flight and mentioned low ground spin start pressure.
- The new time and date for the Starship's eighth test flight has not yet been announced.
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Knowridge
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Image Credit: Knowridge
Scientists set new limits on dark matter’s mysterious lifetime
- Scientists have used advanced technology to set new limits on the lifetime of dark matter.
- Dark matter is an invisible substance that makes up most of the mass in the universe.
- Using a special spectrograph, the researchers observed two distant galaxies to look for decay signals.
- The study suggests that if axion-like particles exist, they could last at least 10 to the power of 25 to 26 seconds.
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Metro
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Image Credit: Metro
Elon Musk calls off Starship test flight 8 weeks after last launch exploded
- Elon Musk called off the Starship test flight in Texas after the last launch exploded.
- The previous launch in January resulted in the rocket exploding minutes into the test flight.
- SpaceX made several hardware and operational changes to make the Starship more reliable.
- Elon Musk hopes to send uncrewed Starship rockets to Mars in 2026.
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Earthsky
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Image Credit: Earthsky
Mercury farthest from sunset on March 7-8 and near Venus
- Mercury reaches its greatest elongation, farthest from the sun, on March 7-8, 2025.
- Visible in the western sky after sunset, Mercury will be about 18 degrees from the sun at its greatest elongation.
- Mercury, shining at -0.4 magnitude, will appear brighter than most stars during this time.
- It will rapidly fade after greatest elongation as it moves behind Earth in its orbit.
- Mercury will be approximately 47% illuminated and 7.3 arcseconds across when viewed through a telescope.
- During this elongation, Mercury will be in front of the constellation Pisces.
- Mercury's visibility is tied to the sun, never venturing far above the horizon.
- Venus and Mercury will be close in the sky in March, both planets disappearing in bright twilight by mid-March.
- Brilliant Venus will emerge in the morning sky in April, with both planets having upcoming significant events in 2025.
- Mercury's elongations vary throughout the year, with the best evening apparition for the Northern Hemisphere in March.
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