1. WHY SATURN HAVE RINGS?
2. WHY THERE IS NO LIFE IN OTHER PLANET?
3.WHY IS PLUTO CALLED A MOON?
1-
Saturn's rings are formed because of the broken objects such as moon, comets asteroids etc entered into its orbit due to its strong gravity.
2-
In planets oxygen is present but bound with some chemicals. Earth is the only planet where free atmospheric oxygen is present. The supply of oxygen in the atmosphere comes mostly from plants. As other planets do not have any life form, it is difficult to obtain oxygen there.
GLIESE 581C is a new planet discovered outside our solar system. It is known as Super Earth as it is 5.6 times bigger than earth. Super earth is reported to be earth like as it is situated within the habitat zone of its star as our earth’s position from sun. It is also assumed that as the distance from its star is moderate, water may available there in liquid form due to moderate temperature. As water is one of the most important constituents for life, living things may grow one day if all other aspects are available in order.
3-
Pluto is the dwarf planet which has five known moons.In order of distance from Pluto they are Charon, Styx, Nix, Kerberos, and Hydra.