Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. [4][2] Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans …

4 天之前 · The object, which the researchers have nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does …

2017年10月4日 · If a planet is there, it’s extremely distant and will stay that way (with no chance – in case you’re wondering – of ever colliding with Earth, or bringing “days of darkness”). It is a …

2024年6月14日 · Astronomers have been scouring the outer solar system for signs of a hypothetical ninth planet for almost a decade, without success. However, we may finally be on …

2024年5月19日 · The case is growing that a Neptune-sized planet – Planet 9 – hides deep in the outskirts of our solar system. Researchers from Caltech, Université Côte d’Azur and …

2024年4月15日 · Astronomers leading the search for the potential planet orbiting our sun far beyond Neptune recently revealed that they’ve whittled away at where it might be in the sky, …

2024年5月1日 · Scientists have been searching for a ninth planet to explain the orbital eccentricities of Uranus and Neptune (and dwarf planets like Sedna and Pluto) for more than a …

Planet Nine - also referred to as Planet X - is a massive, hypothetical object in an elliptical orbit far beyond Pluto, roughly at a distance that would take 10,000 to 20,000 Earth years for it to …

A ‘ghost planet’ sounds like something JJ Abrams is considering for his next project, but that’s just one of the many terms used to describe Planet Nine, a hypothetical mystery world. If it is …

2016年1月20日 · Caltech astronomers believe they've found evidence for a ninth planet in our solar system, a giant with a 20,000 year orbit. An artist’s concept of the possible ninth planet, …