Planet Nine

GS-III: Planet Nine.

News

Planet Nine

Hidden in the outer Solar System lurks a presence, believed to be a gigantic planet orbiting the same Sun and casting a visible influence on the behaviour of a number of other objects.
Although it has not yet been spotted, this behaviour would be difficult to explain if such a presence did not exist.
It is popularly referred to as Planet Nine, the presumed ninth planet of the Solar System, and occasionally as Planet X.

Planet of tiny black hole?

Scientists have proposed that this could be a tiny black hole instead.
They have shown that the behaviour of certain Trans-Neptunian Objects like a primordial black hole.

Primordial black hole

A primordial black hole is one that is believed to have formed immediately after the creation of the universe.
Like Planet Nine, primordial black holes too have been predicted to exist including by the late Stephen Hawking but none has been spotted as yet.

What do we know of Planet Nine so far?

Over the years, scientists have sought to explain several puzzling aspects of the Solar System by attributing these to the influence of Planet Nine.

In a 2016 paper made out a case for Planet Nine’s existence by arguing that it could be responsible for the peculiar alignment of icy objects on the outskirts of the Solar System.

What, then, is the basis of the new suggestion about a black hole?

Researchers based their theory proposed two gravitational anomalies.
One is the unusual orbits of asteroids beyond the orbit of Neptune, which have fed the prediction of Planet Nine, estimated to be somewhere between 5 and 20 times the mass of the Earth.
The other anomaly was observed thousands of light years away, by a project called the Optical Gravitational Lensing Experiment (OGLE).
In six observations, an object bent the light of a star like black holes do. This is called microlensing.

Can the black hole be found?

The catch is that it is much harder to look for a black hole than to look for a planet, especially when the black hole is predicted to be of small dimensions.
However, it is reasonable to expect a dark matter halo surrounds this black hole.
If dark matter can annihilate into particles we know, the halo surrounding the black hole would radiate high energy photons and the halo would be visible in X-rays and gamma rays.

Source: Indian Express

Join Our Telegram

US Resumes Nuclear Weapon Testing

Formation Day

03 Dec, 25
SHARE

On 1st November, eight Indian states—Andhra Pradesh, Chhattisgarh, Haryana, Karnataka, Kerala, Madhya Pradesh, Punjab, and Tamil Nadu—along with five Union Territories—Andaman and Nicobar Islands, Chandigarh, Delhi, Lakshadweep, and Puducherry—celebrate their Formation Day. This date marks an important milestone in India

Turtle (Kachhua) Wildlife Sanctuary

02 Dec, 25
SHARE

The Turtle Wildlife Sanctuary, also known as the Kachhua Sanctuary, is located in the Varanasi district of Uttar Pradesh. It is recognised as India’s first freshwater turtle wildlife sanctuary, established to conserve endangered turtle species and support the ecological health of the Ganga River. Location and Extent The sanctuary co

Introduction of AI and Computational Thinking (CT) in

02 Dec, 25
SHARE

The Ministry of Education plans to introduce Artificial Intelligence (AI) and Computational Thinking (CT) from Class 3 onwards in the 2026–27 academic year. This initiative is part of the National Curriculum Framework for School Education (NCF-SE) 2023 and aligns with the National Education Policy (NEP) 2020. The aim is to prepare student

Sal Tree

02 Dec, 25
SHARE

Scientists from the Environment Department of Himachal Pradesh University (HPU) in Shimla have recently revealed that the Sal tree (Shorea robusta) is the most effective natural air purifier for combating rising pollution levels. Their findings highlight the tree’s superior capacity to trap dust, absorb gases, and cleanse the air compared

US Resumes Nuclear Weapon Testing

02 Dec, 25
SHARE

The President of the United States has ordered the resumption of nuclear weapon testing after a gap of 33 years, the last test being in 1992. This decision marks a significant shift in global nuclear policy and has far-reaching implications for geopolitics, the environment, and international security. Status of Global Nuclear Weapon Testing