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 The study, currently published on the arXiv preprint database but not yet peer-reviewed, suggests that this celestial intruder passed close to where Mars orbits today, reshaping the paths of Jupiter, Saturn, Uranus, and Neptune.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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RCB beat MI by 18 runs after batters fire
Mumbai (PTI): Royal Challengers Bengaluru skipper Rajat Patidar, Phil Salt and Virat Kohli blasted half-centuries as the defending champions beat Mumbai Indians by 18 runs in an Indian Premier League match here on Sunday.
Salt (78 off 36 balls) and Kohli (50 off 38 balls) stitched together a 120-run stand for the opening wicket before Patidar scored a rapid 53 off just 20 balls as RCB posted 240 for 4.
In response, Mumbai Indians were restricted to 222 for 5, with RCB spinner Suyash Sharma (2/47) putting the skids on the home side with a double strike in the eighth over, from which they could not recover.
Sherfane Rutherford top-scored for MI with an unbeaten 71 off 31 balls.
While opener Rohit Sharma appeared to be struggling with a hamstring issue and had to retire hurt on 19, his partner Ryan Rickelton made 37, while Suryakumar Yadav (33) and Hardik Pandya (40) were the other contributors for MI.
Brief scores:
Royal Challengers Bengaluru 240 for 4 in 20 overs (Phil Salt 78, Virat Kohli 50, Rajat Patidar 53, Tim David 35 not out).
Mumbai Indians: 222 for 5 in 20 overs (Sherfane Rutherford 71 not out, Ryan Rickelton 37, Hardik Pandya 40; Suyash Sharma 2/47).
