Planetary Science

Saturn is the planet with the most visible rings. Saturn's rings are one of the most iconic symbols of astronomy.
Saturn is the planet in our solar system that is famous for the rings.

Mouth

moderate temperatures and strong gravity (APEX)

accretion disk

gravity

When a star explodes, it is referred to as a nova. If the star is large enough, it will create a super nova. And if the star is dense enough, it does not explode, but instead collapses on itself and forms a black hole

what is the terrestrial planet that has no atmosphere

Mercury is the smallest of the terrestrial planets.

elliptical galaxy....

Outward pressure and inward gravity

Saturn

In a full moon, the Moon is on the other side of Earth from the Sun. In a solar eclipse, the Moon is on the SAME side of the Earth as the Sun.

As water is cooled its density increases until it reaches about 4 C and then it decreases.

The Milky Way.

Cirrus Clouds are mostly made up entirely of ice crystals.

Pluto has five moons.

Terrestrial means on Earth so Earth is the only terrestrial planet

This is incorrect, the first 4 planets are terrestrial as they are solidly bound planets. Pluto was also a terrestrial dwarf planet. Any planet can have moons but due to the gas giants having larger gravitational forces they have traditionally gathered more moons. Thusly, no.

the giant red spot is found in the planet jupiter.

first it is a nebula, a large cloud of gas and dust that is spread out in an immense volume. After it forms a protostar, which is a large cloud of gas and dust with enough mass to form a star. Then it matters what is that star's mass. it could be a high mass star or a small or medium mass star like our sun.

Pluto barks. Goofy talks.

Mars

When the moon is on the side of the earth opposite the sun you get a full-moon.