Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs)—bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth, over 250 astronomical units (AU). These ETNOs tend to make their closest approaches to the Sun in one sector, and their orbits are similarly tilted. These alignments suggest that an undiscovered planet may be shepherding the orbits of the most distant known Solar System objects. Nonetheless, some astronomers question this conclusion and instead assert that the clustering of the ETNOs' orbits is due to observational biases stemming from the difficulty of discovering and tracking these objects during much of the year.
GENERAL INFO
- Created On: iOS
- Game Version: 1.3.204.1
CHARACTERISTICS
- Radius: 25,600 km
- Sea Level: None
- Surface Gravity: 9.0 m/s
- Rotational Period: N/A
- Escape Velocity: 21.47 km/s
- Mass: 8.84E+25kg
Atmosphere
- Height: 399 km
- Scale Height: 58 km
- Surface Air Density: 0.160 kg/m3
- Surface Temperature: 1,000 K
EQUIRECTANGULAR MAP
