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Planet Nine

All articles tagged with #planet nine

One fleeting glimpse beyond Pluto hints at a hidden outer-solar-system population
space3 hours ago

One fleeting glimpse beyond Pluto hints at a hidden outer-solar-system population

Astronomers identified 2017 OF201, a ~700-km dwarf-planet candidate in a 24,000–25,000-year orbit, currently about 90 AU from the Sun with a perihelion near 45 AU and an aphelion near 1,600 AU. It was discovered by linking faint archival observations across two decades, meaning it is visible for only about 0.5% of its orbit. This narrow window implies there could be hundreds more similar bodies hidden in the outer solar system, highlighting census biases that only count objects bright near perihelion. While 2017 OF201 is not proof of Planet Nine, the work constrains models and shows how archival data can reveal distant worlds long after observations were made. The object's size is inferred from brightness assuming an albedo and may be rounded; its exact shape awaits future data.

via Space Daily|
#archival-data#dwarf-planet-candidate#outer-solar-system
Beyond Neptune: the Sun's dominance reveals a vast, mostly empty solar system
science21 days ago

Beyond Neptune: the Sun's dominance reveals a vast, mostly empty solar system

The Sun accounts for about 99.86% of the solar system’s mass, so gravity is dominated by a single star while the rest is mostly empty space; the solar boundary extends far beyond Neptune to the heliopause (~120 AU), where Voyager 1 entered interstellar space in 2012 and Voyager 2 followed in 2018. Beyond lies the distant, inferred Oort Cloud that may reach up to a couple of light-years, while Planet Nine remains a hypothesis not yet confirmed.

via Space Daily|
#heliopause#oort-cloud#planet-nine
Planet Nine Debate Persists as New Distant-World Detections Complicate the Search
space2 months ago

Planet Nine Debate Persists as New Distant-World Detections Complicate the Search

The article reviews renewed evidence and ongoing controversy over Planet Nine, noting that irregular orbits of distant Kuiper Belt objects and new distant bodies like 2023 KQ14 have kept the hypothesis viable but unproven. Long orbital periods and limited data mean there is no definitive detection yet; if a ninth planet exists, it would likely lie farther than ~500 AU. Ongoing ground- and space-based observations—and future missions—are needed to clarify whether a massive unseen planet shapes these orbits.

via SciTechDaily|
#kuiper-belt#outer-solar-system#planet-nine
Scientists Reinstate the Nine-Planet Model Amid Evidence of a Hidden Planet
science8 months ago

Scientists Reinstate the Nine-Planet Model Amid Evidence of a Hidden Planet

Astronomers have found preliminary evidence of a potential ninth planet in our solar system, based on infrared data from decades-old sky surveys indicating a distant, Neptune-sized object beyond the Kuiper Belt. Further observations are needed to confirm its existence and orbit, which could explain gravitational anomalies observed in the Kuiper Belt. The discovery, if verified, would add a new ice giant to our solar system, similar in composition to Uranus and Neptune.

via Indian Defence Review|
#distant-planet#infrared-surveys#kuiper-belt
NASA's James Webb Telescope and the Search for a Hidden Ninth Planet
science11 months ago

NASA's James Webb Telescope and the Search for a Hidden Ninth Planet

Scientists hypothesize the existence of a ninth planet, called Planet Nine, based on unusual clustering of Kuiper Belt objects and computer simulations suggesting a large, distant gas giant with an orbit 20-30 times farther from the sun than Neptune. However, its existence remains unconfirmed and controversial, with ongoing debates and challenges in observation.

via yahoo.com|
#astronomy#kuiper-belt#planet-nine
Astronomers Detect Signs of a Hidden Ninth Planet in the Outer Solar System
science1 year ago

Astronomers Detect Signs of a Hidden Ninth Planet in the Outer Solar System

Astronomers have identified a potential candidate for Planet Nine beyond Neptune using archival satellite data, sparking excitement and skepticism. The discovery's confirmation depends on future observations, particularly from the Vera C. Rubin Observatory, which could either verify or refute the existence of this elusive planet, potentially reshaping our understanding of the solar system.

via Rude Baguette|
#astronomy#kuiper-belt#planet-nine
Astronomers Detect Potential Ninth Planet Beyond Neptune
science1 year ago

Astronomers Detect Potential Ninth Planet Beyond Neptune

Astronomers have identified a promising candidate for the elusive Planet Nine using archival satellite data, sparking excitement and skepticism. While some believe this could be the long-sought planet beyond Neptune, others, like Mike Brown, question its orbit alignment. The upcoming Vera C. Rubin Observatory is expected to provide definitive evidence to confirm or refute its existence.

via Rude Baguette|
#astronomy#kuiper-belt#planet-nine
Mysterious Solar System Object Reveals New Celestial Insights
science1 year ago

Mysterious Solar System Object Reveals New Celestial Insights

Scientists continue to investigate the possibility of a massive undiscovered planet beyond Neptune, known as Planet Nine, which could explain the irregular orbits of Kuiper Belt objects. While evidence has grown, challenges remain due to limited observations and new discoveries of stable distant objects that suggest such a planet might be farther than initially thought. Ongoing observations and future technology will be crucial in confirming or refuting its existence.

via ScienceAlert|
#astronomy#dwarf-planets#kuiper-belt
Scientists Search for Hidden Massive Object at Solar System's Edge
science1 year ago

Scientists Search for Hidden Massive Object at Solar System's Edge

Scientists continue to investigate the possibility of a massive undiscovered planet, 'Planet Nine', influencing the orbits of distant objects in the Kuiper Belt, though recent discoveries and limited observational data make its existence uncertain. The search relies on telescopic observations, as space travel to the outer solar system would take over a century.

via Phys.org|
#astronomical-observations#kuiper-belt#outer-solar-system