9/16/2023 0 Comments Sun in moonIt is made of oxygen, silicon, magnesium, iron, calcium, and aluminum, with small amounts of titanium, uranium, thorium, potassium, and hydrogen. The crust has a thickness of about 43 miles (70 kilometers) on the Moon’s near-side hemisphere and 93 miles (150 kilometers) on the far-side. It is most likely made of minerals like olivine and pyroxene, which are made up of magnesium, iron, silicon, and oxygen atoms. The mantle extends from the top of the partially molten layer to the bottom of the Moon's crust. A partially molten layer with a thickness of 93 miles (150 kilometers) surrounds the iron core. It is surrounded by a liquid iron shell 56 miles (90 kilometers) thick. The solid, iron-rich inner core is 149 miles (240 kilometers) in radius. The Moon’s core is proportionally smaller than other terrestrial bodies' cores. StructureĮarth's Moon has a core, mantle, and crust. Because Earth is moving as well – rotating on its axis as it orbits the Sun – from our perspective, the Moon appears to orbit us every 29 days. The Moon makes a complete orbit around Earth in 27 Earth days and rotates or spins at that same rate, or in that same amount of time. And a "new moon" occurs when the far side of the Moon has full sunlight, and the side facing us is having its night. During a "full moon," the hemisphere of the Moon we can see from Earth is fully illuminated by the Sun. The changing illumination is why, from our perspective, the Moon goes through phases. As the Moon orbits Earth, different parts are in sunlight or darkness at different times. Some people call the far side – the hemisphere we never see from Earth – the "dark side" but that's misleading. The Moon is rotating at the same rate that it revolves around Earth (called synchronous rotation), so the same hemisphere faces Earth all the time. Credit: NASA Visualization Technology Applications and Development (VTAD)
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |