Tag

Planetary Defense

All articles tagged with #planetary defense

science11 days ago•3 min saved

Tiny Space Rocks, Big Risks: The Decameter Asteroid Threat

MIT researchers warn that decameter-scale asteroids (tens of meters across) strike Earth every few decades, potentially causing 8–10 megaton airbursts, disrupting satellites and possibly triggering the Kessler debris cascade; detection is hard due to low reflectivity, but JWST has aided tracking and Vera Rubin will find more, while MIT is building a follow-up telescope network—though there is currently no global framework to defend against such threats.

via Universe Today|

#decameter-scale-asteroids #jwst #kessler-syndrome

science15 days ago•32 min saved

Car-Sized Asteroid Flies By Earth, No Risk Detected

A car-sized asteroid, roughly 4–8 meters wide and known as 2026FM3, passed about 147,000 miles from Earth (closer than the Moon) on March 24–25. NASA tracked the object after its discovery just days earlier and confirmed it posed no threat. Such small near-Earth objects frequently fly by, and studying these close approaches helps scientists refine detection and planetary defense for larger objects in the future.

via Yahoo|

#2026fm3 #asteroids #nasa

space-and-spaceflight24 days ago•15 min saved

Blue Origin Unveils NEO Hunter Plan to Deflect Asteroids

Blue Origin, in collaboration with NASA's JPL and Caltech, introduced the NEO Hunter mission concept to defend Earth from hazardous near-Earth objects, leveraging the Blue Ring platform. The plan envisions a two-phase approach: first deploying cubesats to study and characterize the target asteroid to guide deflection, including an ion-beam method; if needed, a second phase would perform a robust direct kinetic disruption (inspired by NASA’s DART) with a Slamcam to document the impact. The mission is planned to launch its first phase in spring 2026.

via Gizmodo|

#asteroids #blue-origin #blue-ring

science26 days ago•30 min saved

Bus-Size Asteroid Flies By Earth, No Threat Confirmed by NASA

NASA tracked a roughly 140-foot asteroid, 2007 EG, as it passed about 1.06 million miles (roughly 1.7 million kilometers) from Earth on March 15, 2026. There was no threat detected, and it was part of routine planetary-defense monitoring of thousands of near-Earth objects. The asteroid’s Aten-class orbit crosses Earth’s path, and future close approaches are predicted, including in 2028 and 2043, with ongoing observations to refine its trajectory. ISRO plans to participate more in international asteroid missions.

via Ground News|

#2007-eg #aten-class #nasa

science27 days ago•3 min saved

NASA's DART Nudge Shifts Dimorphos' Orbit, Demonstrating Planetary Defense Feasibility

NASA's DART spacecraft slammed into the Didymos system’s moon Dimorphos in 2022, creating ejecta that boosted momentum and slowed the system’s orbit by about two inches per hour, shortening its solar orbit by roughly 0.15 seconds over 770 days. The result shows we can alter an asteroid’s path, but a much larger or multiple impacts would likely be needed to deflect a real threat; the event provides essential data for improving planetary defense as near-Earth objects remain a vulnerability.

via Jalopnik|

#asteroids #dart #nasa

space28 days ago•6 min saved

MIT’s JWST-Powered Detect-and-Track System Aims to Shield Space Infrastructure

MIT researchers unveil a JWST-based method to detect and track decameter-scale asteroids that are too faint for ground-based telescopes, enabling earlier threat assessment to protect satellites and space infrastructure; the approach, demonstrated with asteroid 2024 YR4, is part of a broader planetary-defense effort that leverages collaborations with observatories like Vera Rubin and MIT facilities to accelerate detection-to-mitigation.

via The Daily Galaxy|

#asteroids #jwst #mit

space-exploration1 month ago•54 min saved

DART finds binary asteroids exchange debris via slow 'cosmic snowballs'

NASA's DART mission captured the first direct evidence that debris can move between the binary asteroid pair Dimorphos and Didymos, with 2022-era imagery showing fan-shaped streaks likely produced by material shed from Didymos and landing on Dimorphos. The ejecta traveled about 30.7 centimeters per second (12.1 inches per second), slow enough to deposit material rather than creating craters, indicating active surface evolution in a binary asteroid system. The findings, published in The Planetary Science Journal, complement other results showing DART altered Dimorphos’ orbit and slightly shifted the binary system’s orbit around the sun; the ESA Hera mission is set to survey the system later this year to further study the aftermath and improve planetary-defense models.

via Space|

#binary-asteroids #dart #didymos

space1 month ago•3 min saved

Europe Fireball Breaks into Meteorites; ESA Probes Koblenz Roof Impact

The European Space Agency is investigating a weekend fireball that lit up skies across Belgium, France, Germany, Luxembourg, and the Netherlands, which broke apart into meteorites and punched a football-sized hole in a Koblenz, Germany home; no injuries were reported. ESA's planetary defence team is analyzing data on the object, thought to be a few metres wide, noting that such objects strike Earth periodically and are often not seen by telescopic surveys.

via ScienceAlert|

#esa #fireball #koblenz

science1 month ago•2 min saved

Moon remains safe as 2024 YR4 will miss the Moon by over 20,000 km

New measurements with powerful telescopes, including the James Webb Space Telescope, show asteroid 2024 YR4 will safely pass the Moon at more than 20,000 km away, ruling out Earth or Moon collision risks and highlighting the value of ongoing near-Earth object tracking for planetary defense.

via The Guardian|

#asteroid #moon #near-earth-object

space1 month ago•10 min saved

NASA nudges asteroid off course in landmark planetary-defense test

NASA's DART mission intentionally collided its spacecraft with the asteroid Dimorphos to test whether altering its trajectory could defend Earth from future impacts, marking the first demonstration of planetary defense in action.

via The Independent|

#asteroid #dart #dimorphos

space1 month ago•8 min saved

Webb nails down asteroid YR4's near-miss with the Moon

JWST observations show asteroid 2024 YR4 will pass about 14,229 miles (22,900 km) from the Moon, with a margin of error of ±497 miles, effectively ruling out a lunar impact and easing previous fears of a Moon collision; the measurements also demonstrate Webb’s growing role in planetary defense by tracking a tiny, fast-moving asteroid and refining its orbit for future risk assessment.

via CNN|

#asteroid-2024-yr4 #astronomy #jwst

space1 month ago•13 min saved

2032 Lunar Collision Fear Dismissed: 2024 YR4 Will Miss the Moon

Initial concerns that the 60-meter asteroid 2024 YR4 could hit Earth or the Moon in 2032 were resolved after James Webb Space Telescope observations, which show the object will miss both the Earth and the Moon—likely by at least about 20,000 km for the Moon—while Earth impact remains highly unlikely; NASA and partners continue monitoring and refining planetary defense efforts.

via Hackaday|

#asteroid #james-webb-space-telescope #moon

science1 month ago•5 min saved

Tiny orbital nudge proves NASA's asteroid defense works

NASA's 2022 DART mission deliberately hit the asteroid Dimorphos, nudging its orbit by a tiny 0.15-second change in its solar orbit. The new analysis confirms that a kinetic-impact deflection can measurably alter a celestial body's path and provides crucial data for planning future planetary-defense efforts, though the test was not in response to any actual threat.

via France 24|

#dart #dimorphos #nasa

science1 month ago•16 min saved

Earth at Risk: Over 15,000 City-Killing Asteroids Remain Undetected

NASA warns at an AAAS meeting that more than 15,000 asteroids large enough to destroy a city remain undetected, leaving Earth with little warning time; only about 40% of roughly 25,000 known city-scale asteroids have been cataloged, while many remain dark or near the Sun. Improving detection through the planned Near-Earth Object Surveyor and expanded ground- and space-based surveys, plus international coordination and sustained funding, could provide crucial warning time to mitigate impacts, but a late discovery could still arrive with limited time to respond.

via Earth.com|

#asteroid-detection #nasa #near-earth-objects

space1 month ago•6 min saved

DART Collision Nudges Didymos-Dimorphos’ Solar Path

A Science Advances study shows NASA’s DART impact on Dimorphos changed not only Dimorphos’ orbit around Didymos, but also the pair’s orbit around the Sun by about 0.15 seconds — the first measurable change to a celestial body’s solar orbit caused by a human-made object. The team used radar, ground-based observations, and 22 stellar occultations to measure Didymos’ motion; debris momentum (momentum enhancement ~2) amplified DART’s effect. This validates kinetic impact as a planetary-defense technique and informs future missions like NASA’s NEO Surveyor.

via NASA (.gov)|

#dart #didymos #dimorphos