Latest Science News
‘Mystery orbits in outer solar system not caused by ‘Planet Nine’, reveals study

[vc_row][vc_column][vc_column_text]The strange orbits of some objects in the outermost reaches of our solar system are not shaped by the hypothesised ‘Planet Nine’, but can be explained by the gravitational force of small bodies orbiting the Sun beyond Neptune, scientists say.
The alternative explanation to the so-called ‘Planet Nine’ hypothesis by researchers at the University of Cambridge in the UK and colleagues proposes a disc made up of small icy bodies with a combined mass as much as ten times that of Earth.
When combined with a simplified model of the solar system, the gravitational forces of the hypothesized disc can account for the unusual orbital architecture exhibited by some objects at the outer reaches of the solar system, according to the study published in the Astronomical Journal.
The new theory is not the first to propose that the gravitational forces of a massive disc made of small objects could avoid the need for a ninth planet. However, it is the first such theory which is able to explain the significant features of the observed orbits while accounting for the mass and gravity of the other eight planets in our solar system.
Beyond the orbit of Neptune lies the Kuiper Belt, which is made up of small bodies left over from the formation of the solar system. Neptune and the other giant planets gravitationally influence the objects in the Kuiper Belt and beyond, collectively known as trans-Neptunian Objects (TNOs), which encircle the Sun on nearly-circular paths from almost all directions.
Since 2003, around 30 TNOs on highly elliptical orbits have been spotted: they stand out from the rest of the TNOs by sharing, on average, the same spatial orientation.
This type of clustering cannot be explained by the existing eight-planet solar system architecture and has led to some astronomers hypothesising that the unusual orbits could be influenced by the existence of an as-yet-unknown ninth planet.
The ‘Planet Nine’ hypothesis suggests that to account for the unusual orbits of these TNOs, there would have to be another planet, believed to be about ten times more massive than Earth, lurking in the distant reaches of the solar system and ‘shepherding’ the TNOs in the same direction through the combined effect of its gravity and that of the rest of the solar system. “The Planet Nine hypothesis is a fascinating one, but if the hypothesised ninth planet exists, it has so far avoided detection,” said Antranik Sefilian, a PhD student at Cambridge University.
“We wanted to see whether there could be another, less dramatic and perhaps more natural, cause for the unusual orbits we see in some TNOs. We thought, rather than allowing for a ninth planet, and then worry about its formation and unusual orbit, why not simply account for the gravity of small objects constituting a disc beyond the orbit of Neptune and see what it does for us?” Sefilian said.
Professor Jihad Touma, from the American University of Beirut, and Sefilian modelled the full spatial dynamics of TNOs with the combined action of the giant outer planets and a massive, extended disc beyond Neptune. The duo’s calculations revealed that such a model can explain the perplexing spatially clustered orbits of some TNOs. They were able to identify ranges in the disc’s mass, its ’roundness’ (or eccentricity), and forced gradual shifts in its orientations (or precession rate), which faithfully reproduced the outlier TNO orbits.
“If you remove planet nine from the model and instead allow for lots of small objects scattered across a wide area, collective attractions between those objects could just as easily account for the eccentric orbits we see in some TNOs,” said Sefilian.
(With PTI Inputs)[/vc_column_text][/vc_column][/vc_row]
India News
Global warming to impact flow of Ganga, Brahmaputra: UN chief Antonio Gutteres
Global warming will likely impact the flow of major Himalayan rivers like the Ganga (Ganges), Brahmaputra and the Indus, the United Nations has warned.

Global warming will likely impact the flow of major Himalayan rivers like the Ganga (Ganges), Brahmaputra and the Indus, the United Nations has warned.
Speaking at an event on the International Year of Glaciers’ Preservation, UN Secretary General Antonio Guterres said that major Himalayan rivers like the Indus, the Ganges and Brahmaputra will feel the impact of glaciers and ice sheets continuing to recede over the coming decades and will have their flow reduced, majorly.
He said the world has already seen how Himalayan melts have worsened flooding in Pakistan, adding that rising sea levels combined with saltwater intrusion will decimate large parts of these huge deltas.
Guterres stressed on the critical importance of glaciers—which today cover 10 percent of the earth’s surface— for life on earth as the massive ice bodies carved out landmasses for human sustenance over millennia
The UN chief expressed concern over human activity driving the planet’s temperature to dangerous new levels and “melting glaciers are the canary in the coalmine”.
Antarctica is losing an average of 150 billion tons of ice mass every year while the Greenland ice cap is melting even faster – losing 270 billion tonnes per year.
Read Also: 2 drunk passengers abuse crew, co-passengers in Dubai-Mumbai IndiGo flight, arrested
In Asia, 10 major rivers originate in the Himalayan region, supplying freshwater to 1.3 billion people living in its watershed.
Antonio Guterres was speaking at the event held on the margins of the UN 2023 Water Conference – formally known as the 2023 Conference for the Midterm Comprehensive Review of Implementation of the UN Decade for Action on Water and Sanitation (2018-2028) – currently underway at UN Headquarters.
The conference which is co-hosted by Tajikistan and the Netherlands will result in a summary of proceedings from the UNGA President that will feed into the 2023 session of the UN High-level Political Forum on Sustainable Development.
A day before the UN Water Conference, the ‘United Nations World Water Development Report 2023: partnerships and cooperation for water’ published by the UN Education, Scientific and Cultural Organization (UNESCO) said that around 80% of people living under water stress lived in Asia; in particular, northeast China, as well as India and Pakistan.
2 drunk passengers abuse crew, co-passengers in Dubai-Mumbai IndiGo flight, arrested
All That Breathes releases in India: Where and when to watch?
Latest Science News
Elon Musk’s SpaceX eyes for its first orbital launch to reach Mars via spacecraft, here’s the first glimpse | WATCH
In September 2019, Musk had announced that SpaceX aimed to fly people to Mars by 2024. The Starship spacecraft will be capable of carrying about 100 people at a time and the company aimed to launch its first orbital test flight within the next six months, Musk had also said during his presentation.

Elon Musk’s SpaceX is looking for its first orbital launch to reach Mars via spacecraft. The billionaire founder, who has revolutionised commercial space travel, has now released a simulation of what the journey to Mars will look like.
This will be real in our lifetime, Musk tweeted after releasing the Martian simulation.
Last week, the billionaire had released the details about the development of Starship, the world’s most powerful rocket ever built.
Standing alongside the 390-foot (119-meter) rocket at SpaceX’s Texas spaceport, Musk had also said let’s make this real! This is really some wild stuff here. In fact, hard to believe it’s real.
In September 2019, Musk had announced that SpaceX aimed to fly people to Mars by 2024. The Starship spacecraft will be capable of carrying about 100 people at a time and the company aimed to launch its first orbital test flight within the next six months, Musk had also said during his presentation.
Elong Musk has estimated that the Starship launch could wind up costing less than $10 million.
From the beginning of the year 2022, the SpaceX has been ramping up operations with its workhorse Falcon-9. The company has also been launching Starlink constellations and cargo to the International Space Station.
Latest Science News
Stephen Hawking birth anniversary: Google Doodle pays tribute to legendary scientist
Hawking is mainly known for his theories on black holes. He revolutionized the modern physics with his theories on origins and mechanics of the universe. His intellectual and curiosity about new things, earned him a nickname Einstein.

Stephen Hawking the legendary scientist and theoretical physicist would be celebrating his 80th birth anniversary. To mark the special day, search engine company Google paid tribute to the English cosmologist and author with a two and half minutes long animated video on their homepage.
Born in Oxford, England, Stephen Hawking was fascinated by the universe from a very young age. However, Hawking was diagnosed with a rare disease named neurodegenerative when he was just 21 years old. The disease slowly forced him to sit on a wheelchair. As the time passed, he started losing his voice and after a while he lost his speech. Therefore, he started to communicate through a speech generating device, which was invented by himself. Google describes the legendary scientist as ‘one of history’s most influential scientific minds’.
Hawking is mainly known for his theories on black holes. He revolutionized the modern physics with his theories on origins and mechanics of the universe. His intellectual and curiosity about new things, earned him a nickname Einstein.
In 1965, Hawking defended his PhD thesis on ‘Properties of Expanding Universe’ at the Cambridge University. The revolutionary theory presented that space and time originated from a singularity.
Here are some of the best quotes by Stephen Hawking
- One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don’t throw it away.
- Quiet people have the loudest minds.
- Intelligence is the ability to adapt to change.
- The victim should have the right to end his life, if he wants. But I think it would be a great mistake. However bad life may seem, there is always something you can do, and succeed at. While there’s life, there is hope.
-
India News13 hours ago
Varanasi Court sentences life imprisonment to gangster Mukhtar Ansari in Awadhesh Rai murder case
-
India News13 hours ago
HDFC Bank manager abuses, howls at employees over incomplete account targets
-
India News21 hours ago
Protesting wrestlers meet Home Minister Amit Shah late on Sunday night, demand an impartial investigation
-
Bihar news21 hours ago
4-lane bridge crumbles like a biscuit in Bihar, one person missing, latest visuals out; watch
-
India News18 hours ago
Three days after the tragic accident, another train derails in Odisha’s Bargarh
-
India News19 hours ago
Dire situation in violence hit Manipur as lack of medicines supply, essential commodities price rises
-
India News20 hours ago
AAP leader Manish Sisodia’s 6-week bail request to be heard in Delhi High Court today
-
Latest Politics News19 hours ago
Shiv Sena, BJP to fight Lok Sabha elections together: CM Eknath Shinde declares after meeting Amit Shah