NASA spacecraft successfully crashes into asteroid in defence test
Washington(PTI): After flying in space for 10 months, a NASA spacecraft successfully crashed into an asteroid on Tuesday in a first-of-its-kind mission to test whether space rocks that might threaten Earth in the future could be nudged safely out of the way, the US space agency said.
The Double Asteroid Redirection Test (DART) the world's first planetary defence technology demonstration -- targeted the asteroid moonlet Dimorphos, a small body just 160 metres in diameter.
Dimorphos orbits a larger 780-metre asteroid called Didymos. Neither asteroid poses a threat to Earth.
The mission's one-way trip confirmed NASA can successfully navigate a spacecraft to intentionally collide with an asteroid to deflect it, a technique known as kinetic impact, the agency said.
"At its core, DART represents an unprecedented success for planetary defense, but it is also a mission of unity with a real benefit for all humanity," said NASA Administrator Bill Nelson.
"As NASA studies the cosmos and our home planet, we are also working to protect that home, and this international collaboration turned science fiction into science fact, demonstrating one way to protect Earth," Nelson said in a statement.
The team will now observe Dimorphos using ground-based telescopes to confirm that DART's impact altered the asteroid's orbit around Didymos.
Researchers expect the impact to shorten Dimorphos' orbit by about 1 per cent, or roughly 10 minutes. Precisely measuring how much the asteroid was deflected is one of the primary purposes of the full-scale test.
"Planetary Defence is a globally unifying effort that affects everyone living on Earth," said Thomas Zurbuchen, associate administrator for the Science Mission Directorate at NASA.
"Now we know we can aim a spacecraft with the precision needed to impact even a small body in space. Just a small change in its speed is all we need to make a significant difference in the path an asteroid travels," Zurbuchen said.
The spacecraft's sole instrument, the Didymos Reconnaissance and Asteroid Camera for Optical navigation (DRACO), together with a sophisticated guidance, navigation and control system enabled DART to identify and distinguish between the two asteroids, targeting the smaller body.
These systems guided the 570-kilogramme box-shaped spacecraft through the final 90,000 kilometers of space into Dimorphos, intentionally crashing into it at roughly 22,530 kilometers per hour to slightly slow the asteroid's orbital speed.
DRACO's final images, obtained by the spacecraft seconds before impact, revealed the surface of Dimorphos in close-up detail.
Fifteen days before impact, DART's CubeSat companion Light Italian CubeSat for Imaging of Asteroids (LICIACube), provided by the Italian Space Agency, deployed from the spacecraft to capture images of DART's impact and of the asteroid's resulting cloud of ejected matter.
In tandem with the images returned by DRACO, LICIACube's images are intended to provide a view of the collision's effects to help researchers better characterise the effectiveness of kinetic impact in deflecting an asteroid.
"DART's success provides a significant addition to the essential toolbox we must have to protect Earth from a devastating impact by an asteroid," said Lindley Johnson, NASA's Planetary Defense Officer.
"This demonstrates we are no longer powerless to prevent this type of natural disaster.
"Coupled with enhanced capabilities to accelerate finding the remaining hazardous asteroid population by our next Planetary Defense mission, the Near-Earth Object (NEO) Surveyor, a DART successor could provide what we need to save the day," Johnson said.
With the asteroid pair within 11 million kilometers of Earth, a global team is using dozens of telescopes stationed around the world and in space to observe the asteroid system.
Over the coming weeks, they will characterise the ejecta produced and precisely measure Dimorphos' orbital change to determine how effectively DART deflected the asteroid.
The results will help validate and improve scientific computer models critical to predicting the effectiveness of this technique as a reliable method for asteroid deflection.
"This first-of-its-kind mission required incredible preparation and precision, and the team exceeded expectations on all counts," said Ralph Semmel, Director at the Johns Hopkins Applied Physics Laboratory (APL) which controlled the mission.
"Beyond the truly exciting success of the technology demonstration, capabilities based on DART could one day be used to change the course of an asteroid to protect our planet and preserve life on Earth as we know it," Semmel added.
IMPACT SUCCESS! Watch from #DARTMIssion’s DRACO Camera, as the vending machine-sized spacecraft successfully collides with asteroid Dimorphos, which is the size of a football stadium and poses no threat to Earth. pic.twitter.com/7bXipPkjWD
— NASA (@NASA) September 26, 2022
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Ballari violence: Were cops made scapegoats to cover political failure?
Bengaluru: Across Karnataka, a serious discussion has begun after the violence in Ballari and the swift action taken against police officers who were on the ground that day. The core question being asked is simple: when law and order fails, why are police officers the first to be shown the door, while political responsibility is quietly pushed aside?
The January 1 clash in Ballari was not a sudden street fight. It was a political confrontation involving supporters of two sitting MLAs. A banner related to the unveiling of a Valmiki statue became the flashpoint. What followed was stone-pelting, firing, and the death of a Congress worker. The situation spiralled within hours.
Within a day, Ballari SP Pavan Nejjur was suspended. Soon after, senior officers were reshuffled. Deputy Inspector General of Police Vartika Katiyar was transferred. No official reason was cited in the notification. But the timing made one thing clear: accountability, at least on paper, had been fixed.
Since then, there has been unease within police circles and political debate outside it.
Unconfirmed reports that Nejjur attempted suicide after his suspension were firmly denied by senior officers and the home minister. They said he was safe, resting, and under stress. Still, the very fact that such reports gained traction says something about the pressure officers feel when action is taken overnight, without public clarity.
Opposition leaders have called Nejjur a scapegoat, pointing out that he had taken charge only hours before the violence. They have asked how an officer can be blamed for a political clash he barely had time to assess. They have also drawn parallels with earlier incidents where police leadership was suspended after tragedies, while political decision-making remained untouched.
However, responding to this criticism, Home Minister G Parameshwara rejected the argument that the suspension was unfair because Nejjur had assumed charge only hours earlier. “It is not important whether he reported to duty on the same day (of incident) or one hour back. Duty is duty. He is not new to the department. IPS officers are trained to handle such situations any time. If he had acted swiftly and promptly, he could have prevented the situation from escalating.” He had said adding that Nejjur did not discharge his duties properly and that this was the reason for his suspension.
Now, fresh and unconfirmed reports suggest that Vartika Katiyar may have met a senior cabinet minister, questioning why she was made to pay the price for a situation that was political in nature. There is no official confirmation of this meeting. But the talk itself has added fuel to the debate.
What is being discussed in the state is not whether the police made mistakes. Many acknowledge that the situation on January 1 was mishandled. A clash earlier in the day was allowed to cool down without strong preventive action. Later, a banner came up near a politically sensitive location. The crowd should not have been allowed to build up. Better anticipation was needed.
At the same time, critics are asking whether the entire burden can be placed on officers when the trigger itself was political rivalry. Who installed the banner? Who mobilised supporters? Who had armed private gunmen present at the spot? These are questions that are still part of the investigation, yet administrative punishment moved faster than political accountability.
This has led to a wider comparison with past incidents, including the Bengaluru stampede after the RCB victory celebrations. There too, police officers were suspended after lives were lost, while decisions taken at higher levels were defended as unavoidable. Many are now saying Ballari fits into the same pattern.
The argument being made is not that the police are blameless. The argument is that responsibility appears to stop at the uniform. When things go wrong, officers are transferred or suspended to send a message. But when the violence is rooted in political rivalry, that message feels incomplete.
Within police ranks, there is also quiet concern about working conditions. Officers say they are expected to manage volatile political situations overnight, often with little room to push back against powerful interests. When things hold, they are invisible. When they collapse, they stand alone.
The Ballari episode has once again exposed this fault line.
For the government, the challenge is larger than one suspension or transfer. The real test is whether it is willing to publicly acknowledge political failures when law and order breaks down, instead of letting the system suggest that the police alone dropped the ball.
For now, what remains is a growing feeling across Karnataka that accountability is selective. And that whenever politics turns violent, the easiest answer is to change the officers, not the decisions that led to the violence in the first place.
