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2025-11-04 Near-Earth Asteroids Spin Faster Than We Thought
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A new study analyzing data from a recent planetary defense exercise has revealed that near-Earth asteroids (NEAs) rotate faster than previously calculated. This is particularly important for missions and planetary defense strategies that may involve landing on or deflecting an asteroid, as a faster spin rate can complicate operations. The finding challenges existing models of asteroid dynamics and highlights the need for precise measurements.
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2025-10-27 Strange Object Between Saturn and Uranus Is 'Evolving' Its Own Ring System
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Observations suggest that Chiron, a centaur orbiting between Saturn and Uranus, is developing its own ring system, making it only the second known centaur after Chariklo to possess rings. Centaurs are minor planets that behave like both comets and asteroids, and this evolving structure hints that planetary rings may be more common, and shorter-lived, than previously thought. The dynamic ring formation offers a unique opportunity to study the early stages of planetary system development.
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2025-10-22 Newly Discovered Asteroid Circles the Sun Inside Venus’ Orbit
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Astronomers have identified only the second known asteroid that orbits the Sun almost entirely within the path of Venus. The discovery highlights a population of "twilight" asteroids, which are extremely difficult to detect in the Sun's blinding glare. Locating and tracking these Inner Earth Objects (IEOs) is crucial, as they could potentially pose an impact threat to Earth.
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2025-10-17 Liquid Water Flowed on Ryugu More Than One Billion Years After It Formed
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New analysis of samples returned from asteroid Ryugu by Japan's Hayabusa2 mission suggests that water activity on the asteroid persisted for far longer than previously theorized. This discovery challenges existing theories regarding the origin of Earth's oceans, indicating that water-rich materials from asteroids like Ryugu may have been delivered to our planet late in the accretion process.
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2025-09-30 Earth Was Born Dry Until a Cosmic Collision Made It a Blue Planet
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Scientists have found that Earth's basic chemistry was set within three million years of the Solar System's formation, but it was initially barren and lacked water. New findings suggest that a cataclysmic, late-stage planetary collision provided the final ingredients, including the necessary water, that allowed Earth to become the vibrant, life-sustaining "Blue Planet" we know today, highlighting the violence of early planetary evolution.
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2025-09-23 What Happened to the Asteroid that Killed the Dinosaurs?
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The asteroid that caused the extinction of the dinosaurs, a roughly 7-mile-wide rock, essentially vaporized upon impact with Earth 66 million years ago. The energy from the collision turned the asteroid into a fine dust that spread across the planet, forming a thin layer of rock known as the iridium anomaly. Only a few tiny fragments of the asteroid have ever been found. The impact also created the massive Chicxulub crater and caused a series of devastating events, including tsunamis, acid rain, global firestorms, and a "nuclear winter," which ultimately led to the extinction of about 75% of Earth's species.
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2025-09-22 Why does Pluto have such a weird orbit?
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Pluto's highly elliptical and extremely tilted orbit is a result of gravitational interactions with the solar system's giant planets, particularly Neptune. As Neptune migrated outward early in the solar system's history, it gravitationally "swept Pluto up" into a stable 3:2 orbital resonance, where Pluto completes two orbits for every three orbits of Neptune. This resonance prevents the two objects from ever colliding and is what allows Pluto to maintain its strange, non-planetary path.
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2025-09-22 Earth Has Another Quasi-Satellite: The Asteroid Arjuna 2025 PN7
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Astronomers have confirmed that the asteroid Arjuna 2025 PN7 is the newest member of the quasi-satellite group, a class of Near-Earth Objects (NEOs) known as Arjuna asteroids. These objects follow a resonant orbit with Earth, meaning they remain in sustained proximity but are not gravitationally bound to our planet. According to research, 2025 PN7 will only be a quasi-satellite for a relatively short period—approximately 128 years—before its path changes and it follows a different type of orbit.
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2025-09-15 Evidence of Ancient Asteroid Impact and Tsunami Found in North Carolina
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New research has uncovered evidence of a massive asteroid impact and subsequent tsunami that occurred 35 million years ago in the Chesapeake Bay region. Scientists investigating rock layers in Moore County, North Carolina, approximately 240 miles from the impact site in Virginia, found four distinct rock beds. These layers, rich in elements like iridium and containing fragments of rock and seafloor debris, provide a detailed record of the cataclysmic event.
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2025-09-15 Tiny asteroid 2025 RJ2 makes close flyby of moon and Earth
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On September 15, 2025, a tiny asteroid named 2025 RJ2, measuring just 12 feet across, will pass by Earth at a distance of approximately 187,000 miles. The following day, September 16, it will make an even closer approach to the moon, coming within about 8,000 miles.
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2025-09-10 Dwarf Planet Quaoar may have an Extra Moon
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Astronomers may have discovered a new moon orbiting the dwarf planet Quaoar. Observations made during a stellar occultation showed a brief light blockage that, based on its profile, is most consistent with a satellite. While a third ring is a possibility, the duration and nature of the event make a new moon the more likely explanation, according to the researchers.
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2025-09-04 Astronomers Discover Mysterious New World at Edge of the Solar System
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Astronomers have discovered a new trans-Neptunian object, designated 2017 OF201, located at the distant edge of our solar system. With an orbit that takes approximately 25,000 years to complete and a diameter estimated around 700 km, it potentially qualifies as a dwarf planet. The detection also demonstrates the power of open science. All the data used to identify and characterize this object are archival data that are available to anyone, not only professional astronomers. Any researcher, student, or even citizen scientist with the right tools and knowledge could have made this discovery.
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2025-09-03 2025 PN7, Earth’s New Quasi-moon
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A newly discovered asteroid, 2025 PN7, has been identified as Earth's eighth quasi-moon, joining seven others that orbit the Sun in a manner that makes them appear to accompany our planet. Discovered on August 29th, 2025, by the Pan-STARRS observatory, this object has been in its quasi-moon orbit for approximately 60 years and is expected to remain so for another 60 before transitioning to a horseshoe orbit.
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2025-08-27 Asteroid Bennu Is Like A Time Capsule From The Early Solar System
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Samples returned to Earth from asteroid Bennu are providing unprecedented insights into the early Solar System, revealing a complex mix of materials both from within and beyond our solar system. Research indicates Bennu's parent asteroid formed over 4 billion years ago from a blend of presolar grains from ancient stars, interstellar organic matter, and solids that condensed near the Sun.
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2025-08-11 Lucy Could Visit An Additional Sub-km Asteroid
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The Lucy spacecraft, currently en route to Jupiter's Trojan asteroids, could potentially visit an additional, smaller asteroid with a minor course correction. This hypothetical flyby would offer a new research target and help differentiate between the L4 and L5 Trojan asteroid populations. While Lucy's primary mission focuses on the L4 cloud, it also plans to visit the Patroclus-Menoetius binary in the L5 group. The proposed plan involves using advanced telescopes to identify potential targets by late 2026.
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2025-08-01 If Pluto Has a Liquid Ocean, It's One of the Best Places to Search for Life Beyond Earth
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Scientists are increasingly focusing on icy moons like Europa and Enceladus, which are known to have subsurface oceans, as potential habitats. Recent theories suggest Pluto could also host a deep ocean, potentially habitable since its formation, if geothermal heat and suitable conditions persist. While Pluto''s extreme distance from the Sun presents challenges, the existence of an ocean there would prove that liquid water can exist even in such cold, dark regions of the solar system, significantly expanding the scope of our search for life beyond Earth.
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2025-07-24 Ancient Relic Could Help Solve the Planet Nine Mystery
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The Subaru Telescope has discovered a cosmic relic, nicknamed "Ammonite" (2023 KQ14), on the edge of our Solar System. This icy body is a "sednoid," a rare class of objects with highly elongated orbits, making it a potential key to understanding the early Solar System and the existence of Planet Nine. Ammonite, an ancient relic dating back 4.5 billion years, was found through the FOSSIL project, which uses the Subaru Telescope to study distant remnants.
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2025-04-28 Vesta's Core
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Previously believed to have a planetary structure with a core, mantle, and crust, Vesta is now thought to lack a core altogether. This unexpected discovery challenges its classification as a protoplanet and raises questions about its formation. Scientists propose that Vesta may have undergone incomplete differentiation, or it could represent a fragment from the assembly of a larger planet. Data from NASA's Dawn spacecraft provided insights into Vesta's composition, reshaping theories of planetary formation and offering new perspectives on how celestial bodies evolve within the solar system.
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2024-08-15 A Rusty Psyche?

Gizmodo logoRecent observations by the James Webb Space Telescope of asteroid Psyche investigated why the asteroid is not reflecting light as expected. The results found a high level of hydroxyl, a group of chemicals similar in composition to water. The data also hints at the presence of water on Psyche’s surface. Will NASA’s “Psyche” mission find a rusty minor planet when it arrives in a few years?

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2024-01-12 Finally! NASA Gains Access to Bennu Samples

CNN Two stubborn fasteners on the glove-box sized Touch-and-Go Sample Acquisition instrument has kept NASA scientists from reaching material collected by OSIRIS-REx in its mission to asteroid Bennu. But after weeks pf effort NASA recently announced success in gaining the precious cargo.

Prying the mechanism loose was no simple task, requiring tools to minimize the risk of damaging or contaminating the samples while being able function within the tightly-confined space of the TAGSAM head. NASA created two specialized tools from surgical steel — “the hardest metal approved for use in the pristine curation gloveboxes” while a team at Johnson Space Center tested the them in a rehearsal lab before using them to remove the stubborn clasps.

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2024-01-02 ESA to Send Mission to Dimorphos

The European Space Agency has plans to send a spacecraft to visit the asteroid Dimorphos and its tiny moon Didymos as a follow up to NASA’s DART mission which impacted the moon as a proof of concept for asteroid defense. The mission, dubbed Hera, will seek to answer questions about how the DART spacecraft’s collision affected the moon. “We need another spacecraft to go back to the crime scene in order to tell whether the impact left a crater or entirely reshaped the asteroid, because with the current data both scenarios are possible,” said Hera mission head Patrick Michel at the Côte d’Azur Observatory in France.

Hera is currently slated for an October 2024 launch, arriving at Dimorphos in December of 2026. The main craft will approach as close as 1 km to the asteroid while its two “cube satellites” will be dispatched to land on the target.

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2023-11-01 NASA Gives OSIRIS_REx New Mission

Phys.org Logo Fresh from a successful mission return samples from asteroid Bennu, the OSIRIS-REx spacecraft has been recommissioned for a journey to study asteroid Apophis during its 2029 flyby of Earth. Renamed to OSIRIS-APEX, it will visit Apophis which is an "S-type" asteroid made of silicate materials and nickel-iron compared to the carbon-rich, "C-type" Bennu. By April 2, 2029—around two weeks before Apophis' close encounter with Earth— OSIRIS-APEX's cameras will begin taking images of the asteroid as the spacecraft catches up to it. In the hours after the close encounter, Apophis will appear too near the sun in the sky to be observed by ground-based optical telescopes. This means any changes triggered by the close encounter will be best detected by the spacecraft.

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2023-10-30 Daily Minor Planet Volunteers Discover an Asteroid

NASA Logo Volunteers working with The Daily Minor Planet program recently discovered an asteroid passing near Earth. A telescope that is part of the Catalina Sky Survey snapped four pictures of the northern sky, and the next day volunteers spotted a clear streak moving through each image. After notifying the Daily Minor Planet team other telescopes world-wide were trained on it to confirm the asteroid’s orbit. Those calculations revealed that the asteroid would pass by Earth about twice as far as the moon the following week and that it was about 50 meters in diameter.

The Catalina Sky Survey is a NASA funded project to find dangerous Near Earth Asteroids (NEAs) based at the Lunar and Planetary Laboratory of the University of Arizona. The Daily Minor Planet is a citizen science project hosted by the Zooniverse that asks volunteers to review animated nightly images taken by this survey to determine if they are real asteroids or false detections.

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2023-10-13 NASA Mission to Psyche Launched

CNN NASA launched its mission to the asteroid Psyche, a mysterious world made largely of metal. The Psyche mission lifted off at 10:19 a.m. ET Friday aboard a SpaceX Falcon Heavy rocket from NASA’s Kennedy Space Center in Florida. The spacecraft will arrive at Mars in May 2026 where it’ll use the planet’s gravity to effectively slingshot its trajectory to the asteroid, arriving in late July 2029.

Psyche’s instruments will investigate the asteroid’s chemical and mineral composition, topography, mass, gravitational field and rotation. The mission’s magnetometer will attempt to detect evidence of a magnetic field around Psyche, which could suggest that the space rock initially formed as a planetary core. If it isn’t a core, it could be a rare, leftover object from the formation of the solar system that has never been observed.

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2023-09-24 Success! OSIRIS-REx Sample Capsule Recovered!

Phys.org Logo NASA successfully recovered the sample return package from its OSIRIS-REx mission to Bennu on Sunday, marking its first return of samples from an asteroid in deep space. Teams with NASA and the U.S. Air Force located the capsule following its touchdown at the U.S. Army's Dugway Proving Ground in Utah. The capsule contains about 9 oz of rocks and other material from Bennu that scientists are eager to study to learn more about the early days of our solar system.

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2022-10-11 Outcome of DART's Impact

Recent observations show that NASA’s Double Asteroid Redirection Test (DART) mission has been a solid success. The spacecraft’s impact on Dimorphos altered the asteroid’s orbit around Didymos by 32 minutes. This marks mankind's first time purposely changing the motion of a celestial object as well as the viability of asteroid deflection technology.

The investigation team is still acquiring data with ground-based observatories around the world - as well as with radar facilities at JPL’s Goldstone planetary radar in California and the National Science Foundation’s Green Bank Observatory in West Virginia. They are updating the period measurement with frequent observations to improve its precision.

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