OCEANS

An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 75% of the Earth's surface is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.

More than half of this area is over 3,000 metres deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt. Scientists estimate that 230,000 marine life forms of all types are currently known, but the total could be up to 10 times that number.

The Water Cycle

The water cycle is also called the hydrologic cycle. Basically, it
involves three steps: water collected in an ocean or other source
evaporates into the air and becomes clouds; the water then gathers together to become heavy enough to fall as rain. The rainwater eventually collects in pools of water which evaporate again. This is a cycle, so it always continues - water never stops moving

Early Solar system

The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.^[1]

Most of the collapsing mass collected in the centre, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.