NASA's Voyager 2 probe nearing interstellar space

Agencies
October 7, 2018

NASA's Voyager 2 probe is approaching interstellar space and has detected an increase in cosmic rays that originate outside our solar system, the US space agency said.

Launched in 1977, Voyager 2 is a little less than 17.7 billion kilometres from Earth, or more than 118 times the distance from Earth to the Sun. Since 2007 the probe has been travelling through the outermost layer of the heliosphere -- the vast bubble around the Sun and the planets dominated by solar material and magnetic fields.

Voyager scientists have been watching for the spacecraft to reach the outer boundary of the heliosphere, known as the heliopause. Once Voyager 2 exits the heliosphere, it will become the second human-made object, after Voyager 1, to enter interstellar space.

Since late August, the Cosmic Ray Subsystem instrument on Voyager 2 has measured about a five per cent increase in the rate of cosmic rays hitting the spacecraft compared to early August.

The probe's Low-Energy Charged Particle instrument has detected a similar increase in higher-energy cosmic rays. Cosmic rays are fast-moving particles that originate outside the solar system. Some of these cosmic rays are blocked by the heliosphere, so mission planners expect that Voyager 2 will measure an increase in the rate of cosmic rays as it approaches and crosses the boundary of the heliosphere.

In May 2012, Voyager 1 experienced an increase in the rate of cosmic rays similar to what Voyager 2 is now detecting. That was about three months before Voyager 1 crossed the heliopause and entered interstellar space. However, Voyager team members note that the increase in cosmic rays is not a definitive sign that the probe is about to cross the heliopause.

Voyager 2 is in a different location in the heliosheath -- the outer region of the heliosphere -- than Voyager 1 had been, and possible differences in these locations mean Voyager 2 may experience a different exit timeline than Voyager 1.

The fact that Voyager 2 may be approaching the heliopause six years after Voyager 1 is also relevant because the heliopause moves inward and outward during the Sun's 11-year activity cycle.

Solar activity refers to emissions from the Sun, including solar flares and eruptions of material called coronal mass ejections. During the 11-year solar cycle, the Sun reaches both a maximum and a minimum level of activity.

"We're seeing a change in the environment around Voyager 2, there's no doubt about that," said Ed Stone, Voyager Project Scientist.

"We're going to learn a lot in the coming months, but we still don't know when we'll reach the heliopause. We're not there yet -- that is one thing I can say with confidence," said Stone.

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News Network
November 26,2024

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Islamabad: Four paramilitary personnel and two policemen have been killed and over 100 security personnel injured as the protest by supporters of jailed former prime minister Imran Khan turned violent prompting the federal government to deploy the army in the national capital along with shoot at sight orders on Tuesday, state-run media said.

Pakistan deployed the army amid a tense stand-off with Khan's supporters from his Pakistan Tehreek-e-Insaf (PTI) pushing forward by removing hurdles on their way to Islamabad's D-Chowk venue as the government vowed to foil their attempt “even if a curfew needs to be imposed.”

Radio Pakistan said a vehicle rammed into Pakistan Rangers personnel killing four Rangers officials on the Srinagar Highway in Islamabad late on Monday night. Five other Rangers personnel and several police officials too sustained severe injuries.

About five kilometres from this spot, a bunch of miscreants, equipped with weapons and ammunition, pelted stones on the Rangers personnel and carried out indiscriminate firing on the security personnel at Chungi No 26 in Rawalpindi, Radio Pakistan said.

It also reported that two policemen were killed but didn't provide any details.

According to Punjab police, one policeman was killed at Hakla interchange on Islamabad outskirts during clashes with the PTI protestors on Monday but it also did not give details about the second policeman.

Separately, Interior Minister Mohsin Naqvi said, at a late night media interaction, that more than one hundred security personnel, mostly from police, were injured and added: “One senior police officer (SP) was critically injured – he suffered a severe head injury -- due to stone-pelting by protesters.”

Radio Pakistan further reported that the Pakistan Army was called in “to deal with the miscreants with an iron hand” and “clear orders have also been issued to shoot miscreants and troublemakers on sight.”

Strongly condemning the attack on Rangers and police personnel by protesters, Prime Minister Shehbaz Sharif, in a statement, directed to immediately identify those involved in the incident and ensure they are brought to justice.

“Attacks on police and Rangers, under the guise of a so-called peaceful protest, are condemnable,” he said, adding, the anarchist group seeks bloodshed and “Pakistan cannot afford any form of chaos or bloodshed. Bloodshed for nefarious political agenda is unacceptable and highly condemnable.”

He also instructed to provide the best possible medical facilities to those injured.

Interior Minister Naqvi said the government had offered an alternative venue to the protestors to stage their activity at Sangjani in the suburbs of the capital and apparently Khan has also agreed to it.

Despite permission given by Khan, “maybe there is a leadership above Imran Khan who has refused to accept this,” he claimed and confirmed that talks were going on with the PTI to resolve the issue and that the PTI leaders were allowed to meet Khan twice on Monday to get his input.

The government is waiting for a formal response to its offer of an alternative venue for protest and “we are now waiting for PTI’s response before taking further steps,” Naqvi added.

Naqvi also warned that “come what may, the PTI would not be allowed to stage a protest at D Chowk and even hinted of imposing a curfew if needed.”

Security sources also said that all necessary measures are being taken to counter terrorist activities by disruptive and extremist elements. “All the miscreants are also being identified to bring them to justice,” the sources added.

Meanwhile, the PTI accused the authorities of using violence in which several of its supporters have been injured. A PTI spokesman told BBC Urdu that at least two supporters have also been killed but it was not confirmed from other sources so far.

Khan, 72, the PTI founder, has been in jail since August 5, 2023, and had given the ‘final call’ for the protest to force the authorities to release all prisoners, including himself, and also restore the alleged stolen mandate or victory of his party in February 8 elections as well as rescind the last month's 26th constitutional amendment allowing the government more powers over judiciary.

Earlier on Sunday, led by Khyber-Pakhtunkhwa Chief Minister Ali Amin Gandapur and Khan's wife, Bushra Bibi, the PTI supporters began their journey from the militancy-hit province with a mission to make it to D-Chowk in the national capital but faced obstacles on the roads.

The D-Chowk, close to several important government buildings: the Presidency, the PM Office, the Parliament, and the Supreme Court, is a prime location in the national capital.

The authorities had blocked the highways by placing shipping containers but the protestors accompanied by lifting equipment and other heavy machines worked their way by removing hurdles, but the hurdles did skittle their speed and plans.

The convoy entered Islamabad from Sangjani toll plaza. The party also shared footage of the KP convoy in Islamabad’s limits.

The government already banned rallies by imposing Section 144, a colonial era law used to outlaw political activities, as a high level delegation from Belarus was visiting Pakistan.

At least one policeman was killed and dozen others injured in clashes on Monday as thousands of the PTI protestors entered the territorial jurisdiction of the national capital. In one of the clashes, a policeman was killed at the Hakla interchange on Islamabad outskirts.

Another constable of the Sargodha police was injured due to “firing by miscreants” and was being treated, local media said, adding, dozens of other policemen too were injured in the clashes, but exact details were not available.

As the convoy entered the capital territory in the evening, Bushra Bibi said in a video message: “My brothers, as long as Imran is not with us, we will not end this march.”

Meanwhile, as announced on Monday, all public and private educational institutions would remain closed in view of the law and order situation both at Islamabad and Rawalpindi on Tuesday.

Khan has been implicated in dozens of cases since his government was dismissed through a no-confidence motion in 2022. He has been in Adiala Jail at Rawalpindi since last year facing over 200 cases.

His party won the largest number of seats in the February general elections despite contesting as independents as the party was denied an election symbol.

The party founder has alleged that the ruling Pakistan Muslim League-Nawaz (PML-N) and its coalition partners, including the Pakistan Peoples Party (PPP), had “stolen the mandate” to grab power at the federal level.

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News Network
November 14,2024

Bengaluru: Karnataka Deputy Chief Minister D K Shivakumar on Thursday backed Chief Minister Siddaramaiah over his claim that the BJP had offered Rs 50 crore each to 50 Congress MLAs in an attempt to "topple" the state government.

Addressing reporters here, Shivakumar, also the Congress state president, said, “The BJP indeed lured 50 Congress MLAs with Rs 50 crore each.”

He defended Siddaramaiah’s statement and said the Congress MLAs were briefed about the BJP’s alleged 'Operation Lotus', a term used to describe the BJP's attempts to destabilise ruling governments through horse-trading.

“Some of our MLAs informed the Chief Minister about this matter, and he, in turn, shared it with the media,” Shivakumar said.

At an event in Mysuru, Siddaramaiah reiterated the claim that "none of the Congress MLAs had accepted the offer".

He also accused the BJP of filing false cases against him in a bid to "remove him and overthrow his government".

The BJP has yet to respond to the allegations.

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News Network
November 16,2024

Mangaluru: The Kavoor police in Mangaluru, Karnataka, have arrested three individuals from Kerala in connection with two separate cybercrime cases, including one involving extortion under the guise of a "digital arrest."

City Commissioner of Police Anupam Agrawal reported that one of the arrested individuals, Nisar, a resident of Ernakulam district, posed as a CBI officer. He allegedly threatened the complainant with arrest and extorted Rs 68 lakh. A case has been filed under sections 66 (C) and 66 (D) of the IT Act, and sections 308 (2) and 381 (4) of BNS.

In another case, the Kavoor police arrested two men, Sahil K P of Thiruvannur, Kozhikode, and Muhammad Nashath of Mappila Koyilandy, Kerala, in connection with a share trade fraud. The accused are alleged to have deceived the complainant by promising substantial profits from an investment in the stock market. Trusting the fraudsters, the complainant invested Rs 90 lakh, which was subsequently lost. A case has been registered under sections 66 (C) and 66 (D) of the IT Act, and sections 318 (4) and 3 (5) of BNS.

The accused were arrested in Koyilandi and presented before the court. The operation was carried out under the guidance of City Police Commissioner Anupam Agrawal, led by Mangaluru North Sub-Division ACP Srikanth K, Kavoor Inspector Raghavendra Byndoor, Kavoor PSI Mallikarjuna Biradara, and staff members Ramanna Shetty, Bhuvaneshwari, Rajappa Kashibai, Praveen N, and Malatesh. 

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