Interstellar visitor may have altered planetary orbits in Solar System, say scientists
A group of scientists has proposed that a massive interstellar object, potentially eight times the size of Jupiter, might have dramatically influenced the orbits of planets in our solar system. The study, currently published on the arXiv preprint database but not yet peer-reviewed, suggests that this celestial intruder passed close to where Mars orbits today, reshaping the paths of Jupiter, Saturn, Uranus, and Neptune.
For years, researchers have noted a discrepancy between the ideal concentric, planar arrangement of planetary orbits and their current three-dimensional orientations. To investigate, the team hypothesized that approximately four billion years ago, a star-sized object entered our solar system. They conducted 50,000 simulations over 20 million years, varying the visitor's mass, velocity, and proximity to the Sun.
Their findings indicate that in about 1% of scenarios, the object's gravitational influence could explain the current orbital patterns of the planets. According to the simulations, the interstellar visitor may have approached within 1.69 astronomical units (AU) of the Sun—just beyond Mars' present orbit. Such proximity would have allowed its gravity to nudge the planets into new trajectories.
While previous theories attributed these irregularities to interactions among the planets themselves, this study posits that a one-time interstellar event may provide a more plausible explanation. The researchers also called for further investigation into the potential effects of such an encounter on minor planets in the asteroid belt and the trans-Neptunian region.
"We estimate that there is about a 1-in-100 chance that such a flyby produces a dynamical architecture similar to that of the solar system," the researchers stated, adding that this encounter could account for the moderate eccentricities and inclinations observed in planetary orbits.
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ED attaches fresh assets in PMLA case against Reliance Group; total attachment over Rs 10K cr
New Delhi (PTI): The Enforcement Directorate has attached fresh assets worth Rs 1,120 crore as part of its money laundering probe against the companies of Reliance Group chairman Anil Ambani, officials said.
Eighteen properties, including the Reliance Centre in Mumbai's Ballard Estate, fixed deposits, bank balance and shareholding in unqouted investments of Reliance Anil Ambani Group have been provisionally attached under the Prevention of Money Laundering Act (PMLA), they said.
Another set of seven properties of Reliance Infrastructure Ltd, two properties of Reliance Power Ltd, nine properties of Reliance Value Service Private Ltd, fixed deposits in the name of Reliance Value Service Private Ltd, Reliance Venture Asset Management Private Lt, Phi Management Solutions Private Ltd, Adhar Property Consultancy Pvt Ltd, Gamesa Investment Management Private Ltd and investments made in unquoted investment by Reliance Venture Asset Management Private Ltd and Phi Management Solutions Private Ltd have also been attached, they said.
The ED had earlier attached properties worth over Rs 8,997 crore in the bank fraud cases related to Reliance Communications Ltd (RCOM), Reliance Commercial Finance Ltd, and Reliance Home Finance Ltd.
The total attachment in the case against the Reliance Group is now Rs 10,117 crore.
