1401/07/04 - 29 صفر 1444 - 2022/9/26
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Astronomical Research Center (A.R.C.)

Astronomy Picture of the Day

All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution; Data source: Igor Shiklomanov

Explanation: How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth's surface, these oceans are shallow compared to the Earth's radius. The featured illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth's Moon, but slightly larger than Saturn's moon Rhea which, like many moons in our outer Solar System, is mostly water ice. The next smallest ball depicts all of Earth's liquid fresh water, while the tiniest ball shows the volume of all of Earth's fresh-water lakes and rivers. How any of this water came to be on the Earth and whether any significant amount is trapped far beneath Earth's surface remain topics of research.
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Praise and Gratitude be to Allah, The Lord of All Worlds. And Prayers and peace and greetings upon the most noble of the prophets and messengers Mohammad (sala lah alyh w aleh): Allah says in the Holy Koran (It is He who made the sun a shining light and the moon a derived light and determined for it phases - that you may know the number of years and account) ). Muslims has taken care of astronomy wide attention because of the close relationship of this science in the care of worship , including: knowledge of the time and direction of Qibla , especially after the overlap of Islamic civilization with other civilizations in the first era of Islam were Muslims gives scrutiny of things, and checked the things.
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