Unsolved mysteries of solar system

 These are the unsolved mysteries of solar system.

1.  Formation of asteroid belt

              Asteroid belt is situated between planets Mars and Jupiter.  Scientists are still unclear that whether it is the remains of failed planet or the product of gravitational interactions.

2.  Uranus Extreme Axial tilt

               Uranus exhibit an axial tilt of    98 degrees causing it to rotate on its side. Though it is hypothesized that collision may be the cause ,  this is still speculative.

3.   Sun's corona temperature anamoly 

                  Sun's corona which is the outermost layer of its atmosphere is significantly hotter than its surface.  Scientists yet to know this temperature discrepancy.

4.  Origin of Saturn's hexagonal storm

                    Saturn's north Pole has persistent hexagonal storm.  Exact cause of this storm is still not known.