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
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Kerala court sentences man to life imprisonment for doc's murder in hospital
_vb_42.jpeg)
Kollam (PTI): A teacher convicted in the sensational murder of Dr Vandana Das inside a hospital here was sentenced to life term on Saturday, and the prosecution said it will move an appeal seeking death penalty for the accused. The victim's family also batted for "maximum punishment".
Dr Das was brutally killed inside a taluk hospital in May 2023 by G Sandeep.
Kollam Additional District and Sessions judge P N Vinod sentenced Sandeep to a total of 30 years for various offences under the then Indian Penal Code (IPC) and said that after he serves that period, his life imprisonment for Das' murder will commence.
The court also imposed a fine of Rs 2.35 lakh on the convict.
Though the prosecution had sought death penalty for the accused during the arguments on sentence, the court was of the view that the case does not fall under the rarest-of-rare category to warrant the maximum punishment.
It was also of the view that there was a chance of the convict getting reformed as he told the court that the rest of his life would be one of repentance, the order on sentence said.
"At the same time, I agree with the stand of the prosecution to the effect that the sentence should commensurate with the gravity of the crime and the sentence should not only be reformative, but should also have a deterrent effect."
"In my view, the said objective can be achieved by directing that the term sentences that will be imposed will run consecutively and life sentence that has to be imposed will commence only after the expiration of terms sentences," the judge said.
After the verdict, special public prosecutor (SPP) Prathap G Padickal told reporters outside the court that he will recommend to the prosecution to file an appeal seeking enhancement of the life imprisonment to death penalty.
The victim's father said that the verdict has come as a relief for the family, but that he cannot authoritatively say whether his late daughter has got justice. He indicated his dissatisfaction with the punishment, saying that steps will be taken to seek its enhancement after discussions with the public prosecutor.
Dr Das' mother said that the family can only wish for the maximum punishment and it was up to the court to decide what sentence should be given. She said that the family will go in appeal, but declined to comment on whether her daughter got justice.
She tearfully said that she wants the convict to suffer the same pain that her daughter underwent "as he stabbed her 27 times".
The court on March 17 had convicted Sandeep for various offences under the IPC, including murder, destruction of evidence and wrongful restraint.
It had also held him guilty under the provisions of the Kerala Healthcare Service Persons and Healthcare Service Institutions (Prevention of violence and damage to property) Act 2012.
Sandeep was brought to the taluk hospital by the police for medical treatment during the small hours of May 10, 2023 and he went on a sudden attacking spree using a pair of surgical scissors kept in the room where his leg injury was being dressed.
A school teacher by profession, he had initially attacked the police officers and another person who had accompanied him to the hospital and then turned on the young Dr Das, who could not escape to safety.
She was stabbed several times and later succumbed to her injuries in a private hospital in Thiruvananthapuram where she was rushed following the attack.
Dr Das was a native of the Kaduthuruthy area of Kottayam district and the only child of her parents.
She was a house surgeon at Azeezia Medical College Hospital and was working at the Kottarakkara taluk hospital as part of her training.
Sandeep had called the emergency number 112, claiming that his life was in danger. When local police located him, he was standing close by his home, surrounded by local residents and his relatives, and had a wound on his leg following an alleged quarrel.
He was then taken to the hospital for dressing the wound.
_vb_97.jpeg)
_vb_62.jpeg)