PLANET NEPTUNE - நெப்ட்யூன் கிரகத்தை பற்றிய டெக்னிக்கல் தகவல்கள் !

1. Diameter: Approximately 49,244 km (30,598 miles)

2. Mass: About 1.02 × 10^26 kg (17 Earths)

3. Surface Gravity: 11.15 m/s² (1.14 g)

4. Orbital Period: 164.8 Earth years

5. Rotational Period: Approximately 16.11 hours

6. Atmosphere: Composed primarily of hydrogen (80%), helium (19%), and methane (1.5%)

7. Average Surface Temperature: -214 degrees Celsius (-353 degrees Fahrenheit)

8. Surface Pressure: No solid surface; pressure increases with depth into the planet

9. Moons: 14 known moons, including Triton, Proteus, Nereid, and Larissa

10. Tilt of Axis: 28.32 degrees (causing seasonal changes)

11. Orbital Speed: 5.43 km/s (19,560 km/h or 12,158 mph)

12. Surface Features: No solid surface; visible cloud tops, bands, and large storm systems such as the Great Dark Spot

13. Magnetic Field: Tilted 47 degrees from the rotational axis, offset from the planet's center

14. Solar Day (Neptunian Day): Approximately 16.11 Earth hours

15. Atmospheric Density: Dense atmosphere extending deep into the planet

16. Surface Composition: No solid surface; composed of gas and ice, primarily water, ammonia, and methane ices

17. Geological Activity: No geological activity on Neptune itself, but evidence of geological activity on its moon Triton

18. Ring System: Faint ring system composed of dust particles and small rocks, discovered in 1984

19. Distance from Sun: Average of about 4.50 billion km (2.79 billion miles)

20. Albedo (Reflectivity): Average albedo of 0.41

21. Escape Velocity: 23.5 km/s (52,500 mph)

22. Weather: Extreme and dynamic weather patterns, with high-speed winds and large storm systems

23. Radiation: Moderate levels of radiation in its magnetosphere

24. Interior Composition: Likely has a rocky core surrounded by a mantle of water, ammonia, and methane ices, with an outer layer of hydrogen and helium