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In a unique study, astronomers have found compelling evidence that the planets begin forming while stars are still infants and they grow up together like siblings.
The high-resolution image obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) shows a young proto-stellar disk with multiple gaps and rings of dust.
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This new result, published in the journal Nature, shows the youngest and most detailed example of dust rings acting as cosmic cradles, where the seeds of planets form and take hold.
An international team of scientists led by Dominique Segura-Cox at the Max Planck Institute for Extraterrestrial Physics (MPE) in Germany targeted the proto-star IRS 63 with the ALMA radio observatory.
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This system is 470 light-years from Earth and located deep within the dense L1709 interstellar cloud in the Ophiuchus constellation.
Proto-stars as young as IRS 63 are still swaddled in a large and massive blanket of gas and dust called an envelope and the proto-star and disk feed from this reservoir of material.
According to the researchers, IRS 63 is different: at under 500,000 years old, it is less than half the age of other young stars with dust rings and the proto-star will still grow significantly in mass.
“The rings in the disk around IRS 63 are so young,” Segura-Cox said.
“We used to think that stars entered adulthood first and then were the mothers of planets that came later. But now we see that proto-stars and planets grow and evolve together from early times, like siblings,” Segura-Cox added.
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Planets face some serious obstacles during their earliest stages of formation. They have to grow from tiny dust particles, smaller than household dust here on Earth.
The researchers found that there are about 0.5 Jupiter masses of dust in the young disk of IRS 63 further than 20 au (astronomical unit) from its center (at a distance similar to the Uranus orbit in our solar system).
That is not counting the amount of gas, which could add up to 100 times more material.
Want to read more in Hindi? Checkout: अमिताभ बच्चन के पैतृक गांव को है उनका इंतजार
“It takes at least 0.03 Jupiter masses of solid material to form a planet core that will efficiently accrete gas and grow to form a giant gas planet,” the team said,
These results show that we must focus on the youngest systems to truly understand planet formation.
For example, there is growing evidence that Jupiter may have actually formed much farther out in the Solar System, beyond the Neptune orbit, and then migrated inwards to its present location.
“Similarly, the dust surrounding IRS 63 shows that there is enough material far from the proto-star and at a stage young enough that there is a chance for this Solar System analog to form planets in the way that Jupiter is suspected to have formed,” the team noted. (IANS)
With the festive season on in full swing, iconic brand Johnnie Walker, is all set to re-energize the country's after-hour culture. Through its one-of-a-kind campaign #RevibeTheNight, the brand brings together beloved music artists like Divine, Ritviz, Lisa Mishra, Taba Chake along with popular indie bands like When Chai Met Toast and Mad Boy Mink, among others to perform live across iconic community spaces in India.
The collaborative effort by Johnnie Walker aims to bring back the after-hour culture through live performances across popular hotspots in India. The brand's goal is drive social regeneration in India and bring back the vibe of socializing through local music artists and reignite the trade, driving social culture by executing the live events with Covid measures in place and a limited capacity audience capacity.
The collaborative effort by Johnnie Walker aims to bring back the after-hour culture through live performances across popular hotspots in India. | Photo by Vishnu R Nair on Unsplash
Prior to the world going into lockdown, the after-hour culture in India bloomed at celebrated community hubs, that eventually became a safe-haven for individuals, a place where they found their sense of self-expression and belonging, that fuelled progress. This community was driven through the culture of live music and enthralling performances that created their very own vibe, a vibe that built extraordinary, forever-lasting relationships. Through #ReVibeTheNight, one can reconnect with this community bringing music curated by artists who have a history of captivating crowds with their one-of-a-kind live experiences. Catch the gigs and live performances for artists in these venues/cities for the live performances.
(Artiicle originally published on IANSlife) (IANS/ MBI)
Keywords: johnnie walker, social, #revibethenight, performances, community, artists, culture, festivity, begin
By Nikhila Natarajan
In a continuing study on the effects of machine learning (ML) on public conversation, Twitter has confirmed that its algorithms amplify right-leaning political content. "In six out of seven countries - all but Germany - tweets posted by accounts from the political right receive more algorithmic amplification than the political left when studied as a group," Twitter blogged.
"Right-leaning news outlets, as defined by the independent organisations, see greater algorithmic amplification on Twitter compared to left-leaning news outlets." Since 2016, Twitter users are able to choose between viewing algorithmically ordered tweets first in their home timeline or viewing the most recent tweets in reverse chronological order.
"An algorithmic home timeline displays a stream of tweets from accounts we have chosen to follow on Twitter, as well as recommendations of other content Twitter thinks we might be interested in based on accounts we interact with frequently, tweets we engage with, and more. "As a result, what we see on our timeline is a function of how we interact with Twitter's algorithmic system, as well as how the system is designed."
The new research is based on tweets of elected officials of House of Commons members in Canada, the French National Assembly, the German Bundestag, House of Representatives in Japan, Congress of Deputies of Spain, House of Commons in the UK, and official and personal accounts of House of Representatives and Senate members in the US, as well as news outlets, from April 1 to August 15, 2020.
Tweets about political content from elected officials, regardless of party or whether the party is in power, do see algorithmic amplification when compared to political content on the reverse chronological timeline. | Photo by Sara Kurfeß on Unsplash
The study was conducted by Ferenc Huszar (Twitter, University of Cambridge), Sofia Ira Ktena (now at DeepMind Technologies), Conor O'Brien (Twitter), Luca Belli (Twitter), Andrew Schlaikjer (Twitter), and Moritz Hardt (UC Berkeley).
The questions probed were:
How much algorithmic amplification does political content from elected officials receive in Twitter's algorithmically ranked Home timeline versus in the reverse chronological timeline? Does this amplification vary across political parties or within a political party?
Are some types of political groups algorithmically amplified more than others? Are these trends consistent across countries?
Are some news outlets amplified more by algorithms than others? Does news media algorithmic amplification favour one side of the political spectrum more than the other?
Tweets about political content from elected officials, regardless of party or whether the party is in power, do see algorithmic amplification when compared to political content on the reverse chronological timeline. (IANS/ MBI)
Keywords: algorithmically, timeline, algorithmic, tweets, political, survey, twitter, study, germany, skew
Even as India celebrates reaching a milestone of 100 crore Covid vaccine doses, Snapdeal co-founder and COO Rohit Bansal on Friday lauded a man who facilitated 64 registrations for the vaccine on the CoWin portal. In a video shared on his Facebook and Twitter page, Bansal hailed Sonu Kumar as a "citizen celebrity".
Bansal said that Kumar not only helped "just co-workers and family but complete strangers too. With patience, empathy and uncanny jugaad". He added that Kumar joined him "many moons ago" and completed his open school from a parking lot.
"Education has helped this wonderful man enable others to get India back on track. Bravo! The CoWin portal on Thursday mentioned that a total of 100 crore vaccine doses has been administered so far to the eligible population under the vaccination drive in India, nine months after the nationwide inoculation programme was started to protect the people against Covid-19.
"It's a cause of significant celebration and happiness," Bansal said in the video. He said that while people just help a few around them, Kumar "bridged the digital gap" for 64 people, who were finding it difficult to register themselves online on the vaccine portal. Kumar said he doesn't feel that he has contributed much towards the 100 crore vaccine dose count. "I have been able to help only 64 people, if I was able to help more I would have been happier." (IANS/ MBI)
Keywords: cowin, covid, india, people, Rohit bansal, Sonu kumar, vaccine, snapdeal, registrations