The Case Strengthens for Planet 9 | News | Astrobiology
3 days ago — Some call the potential celestial object Planet X and some call it Planet 9 — as in, the ninth planet in our solar system now that Pluto has been demoted to a dwarf planet. But by any name, the interest is clearly high.
Caltech Researchers Find Evidence of a Real Ninth Planet
3 days ago — Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. 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 Neptune (which orbits the sun at an average ...
Hypothetical Planet X - NASA Science
Batygin and Brown nicknamed the hypothetical object “Planet Nine.” However, the notion of an undiscovered large planet in the realm beyond Neptune has been investigated multiple times in the past century, based on distinct lines of evidence. Sometimes it’s also referred to as “Planet X.”
Planet 9: Inside the search for a hidden planet in our solar system …
Nov 5, 2024 — An artist's concept illustrates the theorized Planet Nine, which Batygin and Brown believe to be five to seven times the mass of Earth. A competing theory proposes the existence of a hidden Kuiper ...
In Depth | Hypothetical Planet X - NASA Solar System Exploration
Jan 20, 2015 — Caltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto.
Is Planet X/Planet Nine real? | The Planetary Society
Apr 2, 2024 — In the early years of the search, the mystery world was known as Planet X. In the new millennium, the hunt for a ninth planet was renewed, this time under the name Planet Nine. To this day, a hypothetical ninth planet remains possible, yet …
There's one last place Planet Nine could be hiding - Phys.org
Feb 19, 2024 — A study recently submitted to The Astronomical Journal continues to search for the elusive Planet Nine (also called Planet X), which is a hypothetical planet that potentially orbits in the...
Researchers see signs of a real Planet X | Astronomy.com
Jan 20, 2016 — Researchers see signs of a real Planet X. The gravitational tug on outer solar system objects indicates this giant world -- if it exists -- would be 5,000 times more massive than Pluto and take...
Astronomers narrow down where 'Planet Nine' could be hiding by …
Feb 28, 2024 — Planet Nine, also known as Planet X, is a theoretical planet that is rumored to exist in the outer solar system. The Planet Nine hypothesis was first proposed in 2016 by Caltech astronomers...
New Telescope Could Potentially Identify Planet X
Nov 6, 2024 — Renewed Interest in Planet X. The search for Planet X eventually led to the discovery of Pluto in 1930. “At the time, astronomers thought, this planet we’ve been talking about, it’s a giant planet beyond Neptune,” Siraj says. As technology improved, scientists were better able to calculate Pluto’s mass, which prompted some ...