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Drill-and-detonate plan: researchers propose nuking approaching asteroids to avert catastrophe
technology21 days ago

Drill-and-detonate plan: researchers propose nuking approaching asteroids to avert catastrophe

Chinese scientists from the China Academy of Launch Vehicle Technology propose a defense against large near-Earth asteroids by drilling into an incoming rock and detonating a nuclear device about 100 meters deep. Computer simulations suggest a 300-kiloton explosion could destroy a small asteroid (~164 feet), while a 3-megaton blast could destroy a much larger body (~1,000 meters), with effectiveness depending on size, speed, and depth of detonation. Real-world viability would require early threat detection and a mission capable of delivering drilling and nuclear hardware into space, adding to ongoing discussions of nuclear options alongside other defenses like NASA’s DART.

via New York Post|
#asteroid-defense#dart#early-detection
DART Nudge: First Deliberate Change to an Asteroid’s Path
science21 days ago

DART Nudge: First Deliberate Change to an Asteroid’s Path

NASA’s 2022 DART impact on Dimorphos changed its orbit around Didymos by about 33 minutes, aided by ejecta’s recoil that added to the spacecraft’s push; Hera will later weigh Dimorphos and image the crater to refine the physics; the result shows a kinetic-impactor deflection is feasible with enough warning, but depends on accurately measuring the target’s mass and accounting for debris—lessons vital as new near-Earth threats, like 2024 YR4, remain on the radar.

via Space Daily|
#asteroid-deflection#dart#didymos
A Decade of Planetary Defense: Gains Made, But More Skywatching Is Needed
science1 month ago

A Decade of Planetary Defense: Gains Made, But More Skywatching Is Needed

International Asteroid Day marks 10 years of progress in defending Earth from space rocks, with nearly 40,000 near-Earth objects identified and NASA's DART mission proving a redirect of an asteroid is possible. Yet experts warn we still lack enough telescopes to spot all threats; the upcoming Near-Earth Object Surveyor aims to detect two-thirds of potentially hazardous asteroids, as events like the 2029 Apophis close approach highlight the ongoing need for vigilant skywatching.

via ABC News - Breaking News, Latest News and Videos|
#asteroids#dart#near-earth-object-surveyor
DART proves humanity can nudge an asteroid's orbit
space2 months ago

DART proves humanity can nudge an asteroid's orbit

NASA’s DART deliberately struck Dimorphos, a small moonlet of Didymos, at about 6 km/s and shortened its orbital period around Didymos by roughly 33 minutes—a result well beyond the required 73 seconds for success—largely due to ejecta momentum (beta ~3.6). This confirmed that a kinetic-impact deflection can alter an asteroid’s trajectory if done years in advance, though the exact effectiveness depends on the target’s composition; ESA’s Hera mission, launched in 2024, will measure Dimorphos’s mass and crater to turn the result into a calibrated figure ahead of any future planetary-defense decisions.

via Space Daily|
#dart#didymos#dimorphos
Highland Park exits DART, reshaping North Texas transit
transportation3 months ago

Highland Park exits DART, reshaping North Texas transit

Highland Park voters chose to exit the Dallas Area Rapid Transit (DART) system, the first suburb to do so since 1989; Addison and University Park voted to stay in DART, leaving 12 member cities. DART says Highland Park’s withdrawal will take effect May 14 and will cost about $270 million in sales-tax revenue over 20 years, with the closure of 15 bus stops and the loss of paratransit service in Highland Park amid ongoing disputes over taxes and service.

via The Texas Tribune|
#addison#dart#highland-park
DART Achieves First Solar-Orbit Change After Asteroid Impact
science-space4 months ago

DART Achieves First Solar-Orbit Change After Asteroid Impact

NASA’s DART mission confirmed that crashing into the small asteroid Dimorphos shortened its orbit around the larger Didymos by about 32 minutes, and new analysis shows the impact also nudged the binary system’s solar trajectory by roughly 1.7 inches (4.3 cm) per hour—the first measured change in an object’s path around the Sun—demonstrating humanity’s ability to steer asteroids if needed.

via DOGO News|
#dart#didymos#dimorphos
NASA's DART Nudge Shifts Dimorphos' Orbit, Demonstrating Planetary Defense Feasibility
science5 months ago

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
DART finds binary asteroids exchange debris via slow 'cosmic snowballs'
space-exploration5 months ago

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
DART impact nudges binary asteroid off its solar path
space5 months ago

DART impact nudges binary asteroid off its solar path

NASA's 2022 DART impact on Dimorphos not only shortened its orbit around Didymos (from 11h55m to 11h23m) but also nudged the entire Didymos–Dimorphos system onto a subtly different solar orbit, thanks to momentum from the ejecta which doubled the thrust. The system's solar-trajectory change is about 11.7 microns per second (roughly 1.7 inches per hour) and the orbit around the Sun shifted by about 0.15 seconds; the findings, published in Science Advances, confirm asteroid deflection is feasible and underscore the value of NEO Surveyor and amateur occultation observers who helped quantify the change. Dimorphos density ~1,540 kg/m3; Didymos ~2,600 kg/m3.

via Yahoo|
#asteroid-deflection#dart#didymos
DART’s hit nudged the Didymos–Dimorphos pair into a slightly faster solar orbit
space5 months ago

DART’s hit nudged the Didymos–Dimorphos pair into a slightly faster solar orbit

NASA’s DART spacecraft’s impact on Dimorphos altered the binary asteroid system’s motion around the Sun: their orbital period around the Sun shortened by about 0.15 seconds (from ~770 days) due to momentum transfer and debris ejection (~16 million kg). The measured change in orbital speed was ~11.7 microns per second, marking the first time a human-made object subtly altered a celestial body’s solar orbit; follow-up Hera observations will study the aftermath.

via CNN|
#asteroid-deflection#dart#didymos
DART makes history by nudging an asteroid's path around the Sun
space5 months ago

DART makes history by nudging an asteroid's path around the Sun

NASA's DART spacecraft’s 2022 impact on Dimorphos not only shortened the moonlet's orbit around Didymos but also measurably altered the Didymos–Dimorphos system's orbit around the Sun, changing the pair's solar trajectory by about 11.7 microns per second (roughly 1.7 inches per hour). This first-of-its-kind result supports planetary-defense research by showing how small nudges can accumulate to influence long-term hazard assessments.

via Engadget|
#dart#didymos#dimorphos
Tiny orbital nudge proves NASA's asteroid defense works
science5 months ago

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