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Astronomers discovered Sun-like star that devoured its own planets

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Astronomers discovered Sun-like star that devoured its own planets
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New York, Oct 13: Astronomers have discovered that a Sun-like star lurking around 350 light-years away consumed the rocky equivalent of 15 Earths.

Dubbed Kronos after the child-eating Titan of Greek mythology, the star is the clearest and most dramatic case yet of a Sun-like star consuming its own planets, said Semyeong Oh, astrophysicist at Princeton University in New Jersey and lead author of the study.

“Even if our Sun ate the entire inner solar system, it wouldn’t come close to the anomaly we see in this star,” study co-author David Hogg from the Flatiron Institute in New York added.

The research did not begin as a hunt for a planet-eater.

Oh was analysing a catalog of new star data collected by the European Space Agency’s Gaia spacecraft for pairs of stars with similar speeds and trajectories.

Such duos are typically twin stars that formed close together from the same ingredients.

The analysis ultimately led to the identification of Kronos and its lesser known brother Krios.

Their official designations are HD 240430 and HD 240429, and they are both about 350 light years from Earth.

The keys to the discovery were first confirming that the widely separated pair are in fact a binary pair, and secondly observing Kronos’ strikingly unusual chemical abundance pattern, Oh explained in a statement released by the Princeton University.

Other co-moving star pairs have had different chemistries, Oh explained, but none as dramatic as Kronos and Krios.

Most stars that are as metal-rich as Kronos “have all the other elements enhanced at a similar level,” she said, “whereas Kronos has volatile elements suppressed, which makes it really weird in the general context of stellar abundance patterns.”

In other words, Kronos had an unusually high level of rock-forming minerals, including magnesium, aluminium, silicon, iron, chromium and yttrium, without an equally high level of volatile compounds — those that are most often found in gas form, like oxygen, carbon, nitrogen and potassium, the study said. (IANS)

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Number of Students Opting for Science or Tech Are On Rise in India

India leads the world in the number of students getting bachelors degrees in science, technology, engineering and maths (STEM) subjects, according to the UN Conference on Trade and Development (UNCTAD).

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Sydney-based University of New South Wales (UNSW) has instituted 61 scholarships to attract
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India leads the world in the number of students getting bachelors degrees in science, technology, engineering and maths (STEM) subjects, according to the UN Conference on Trade and Development (UNCTAD).

Of about 5 million students who received their bachelor’s degrees in 2012 in STEM subjects worldwide, 29.2 per cent were from India, UNCTAD’s Technology and Innovation Report 2018 released on Tuesday said.

China came next with 26 per cent of the STEM graduates. The EU accounted for 9.5 per cent of STEM graduates that year and the US for 6 per cent, the report said.

The report used statistics from 2012 and said the total number of bachelors-equivalent degrees awarded that year was 20 million.

The wide gulf in the numbers of students graduating in STEM explains why the US relies on such a large number of foreigners, especially Indians, to fill its technology workforce needs.

“Many countries are witnessing skills shortages in the fields of digital technologies and many employers report difficulties in filling high-skill vacancies,” UNCTAD said, citing a 2016 worldwide survey by ManpowerGroup on talent shortage that found that 40 per cent of employers reported difficulties in filling positions.

So, if your child is preparing for IIT-JEE or NEET from any of the reputed centres like Aakash Institute, as a parent, it's your responsibility to help your child find the right study time
study, representational image, Pixabay

According to India’s University Grants Commission, 10.7 million students were studying science, engineering/technology or computer science in 2016-17, although it did not give a breakdown between undergraduate and postgraduate levels or by year of study.

They made up 36 per cent of those studying in universities and colleges, UGC statistics showed.

Looking to the future, UNCTAD cautioned that “there were indications that educational institutions were not keeping pace with technological advances during the current transition period”.

It urged educational institutions to “react with agility” to the rapid pace of technology and the labour market changes and said this may require “significant transformations” in the education and training systems.

With the widespread use of artificial intelligence and robots looming on the horizon, the report said that “rapid technological progress required the labour force to develop a broader range of skills, focusing on humans’ comparative advantage, to increase employability”.

Also Read: India-Trained ‘Wrongly Educated’ Monks Banned by China

UNCTAD called for broadbasing education and said: “In the new technological landscape, there is a need for generic, core or fundamental skills such as literacy, numeracy and academic skills, together with basic financial and entrepreneurial skills and increasingly, basic digital and even coding skills.” (IANS)

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