A year on Sedna is 10,500 Earth years.
Calculated at around 11,400 earth years.
No. While we only have a rough estimate of Sedna's size, we know that it is much smaller than Earth.
Sedna is thought to be less than 1600 km across, which would make it very much smaller than the Earth. We do not have really good dimensions yet.
Sedna's gravity is significantly weaker than Earth's gravity. Sedna is a distant dwarf planet located in the outer reaches of our solar system, and its smaller size and mass result in a much weaker gravitational pull compared to Earth.
The heliosphere starts right here (or, you might say, at the Sun). Sedna is much further out. However, the heliosphere extends far out beyond Pluto. So the outer boundary of the heliosphere can be beyond Sedna. Sedna has an orbit that is very "eccentric" (highly elliptical). It's distance from the Sun varies greatly as it orbits. So, whether Sedna is inside or outside of the heliosphere changes with time.
There is no exact time but it is prob anywhere from 400-500 million years from now
No. It is much older. Earth is about 4.6 billion years old.
Jupiter makes one rotation around the sun every 11.86 years. This equals 4,332 days. It has to orbit 778 million kilometers compared to Earth's 150 million kilometers.
58.90 Earth Days.
12 years
The beryllium abundance in the earth's crust is 4-6 ppm.
Sedna is about 90 Astronomical Units from the Sun, at present. That's about 3 times further than Pluto. It's near to its closest approach to the Sun.It can get to about 75 AU at its nearest, but reaches over 900 AU from the Sun at its most distant. Its average distance is about 520 AU.