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NASA’s Voyager 2 becomes second spacecraft to reach interstellar space

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Washington: Nasa’s Voyager 2 has become only the second human-made object to reach the space between stars.

Nasa said that the spacecraft left the region of the sun’s influence last month and is now beyond the outer boundary of the heliosphere, about 11 billion miles from Earth. It is trailing Voyager 1, which reached interstellar space – the vast, mostly empty area between star systems – in 2012.

The study, published in the journal Nature Astronomy, confirmed Voyager 2’s passage on November 5, 2018, into the ISM by noting a definitive jump in plasma density detected by a plasma wave instrument on the spacecraft.

The marked increase in plasma density is evidence of Voyager 2 journeying from the hot, lower-density plasma characteristic of the solar wind to the cool, higher-density plasma of interstellar space, the researchers said.

It is also similar to the plasma density jump experienced by Voyager 1 when it crossed into interstellar space, they said.

“In a historical sense, the old idea that the solar wind will just be gradually whittled away as you go further into interstellar space is simply not true,” said Professor Don Gurnett from the University of Iowa, and corresponding author on the study.

Data from the instrument on Voyager 2 also gives additional clues to the thickness of the heliosheath, the outer region of the heliosphere and the point where the solar wind piles up against the approaching wind in interstellar space, which Gurnett likens to the effect of a snowplow on a city street.

Corona

Corona cases increasing, government advises all states and UTs to take precautions

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Corona cases are increasing once again in the country; keeping in mind the government has become cautious. Along with the constant precaution, Corona guidelines are also being emphasized. In this context, Home Secretary Ajay Bhalla has written a letter to states and union territories to extend the Corona Guidelines by 31 March. In this letter, all the states said that to remove the epidemic completely, caution and strict monitoring needs to be maintained.

Urging the authorities to ensure compliance with the guidelines issued for the corona epidemic, Bhalla said that all activities have been permitted following the standard operating procedures (SOPs) issued by the concerned administrative ministry and department. He further reiterated that there would be no restriction on persons and goods for trade along the borders of neighboring countries.

The official said, ‘As you know, the number of active and new cases in the country has come down drastically in the last few months. However, to remove the epidemic completely, caution and strict monitoring are required to be maintained. ‘

For the past several days, cases are increasing in Maharashtra located in the country. The state government is also cautious about this. Instructions have also been given to show the Corona Negative Report to the people arriving there. This state is the most infected in the country. At the same time, India remains the second-most infected country in the world, whereas the first-ranked country is the United States.

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