What is earth’s only natural satellite?

Space colonization, on the Moon or elsewhere, is widely debated. Some argue that humans have a moral duty to save our species from extinction, and space colonization is one way of doing so. Others argue that living in space is science fiction and that we should concentrate on improving life on Earth instead of potentially ruining another planet or moon. For more on the debate about colonizing space, visit Properties of the Moon and the Earth-Moon system Moon Earth approximate ratio (Moon to Earth) mean distance from Earth (orbital radius) 384,400 km — — period of orbit around Earth (sidereal period of revolution) 27.3217 Earth days — — inclination of equator to ecliptic plane (Earth's orbital plane) 1.53° 23.44° — inclination of equator to body's own orbital plane (obliquity to orbit) 6.68° 23.44° — inclination of orbit to Earth's Equator 18.28°−28.58° — — eccentricity of orbit around Earth 0.0549 — — recession rate from Earth 3.8 cm/year — — rotation period synchronous with orbital period 23.9345 hr — mean radius 1,737 km 6,378 km 1:4 surface area 37,900,000 km 2 510,000,000 km 2 (land area, 149,000,000 km 2) 1:14 mass 0.0735 × 10 24 kg 5.976 × 10 24 kg 1:81 mean density 3.34 g/cm 3 5.52 g/cm 3 1:1.7 mean surface gravity 162 cm/sec 2 980 cm/sec 2 1:6 escape velocity 2.38 km/sec 11.2 km/sec 1:5 mean surface temperature day, 380 K (224 °F, 107 °C); night, 120 K (−244 °F, −153 °C) 288 K (59 °F, 15 °C) — temperature extremes 396 K (253 °F, 123 °C) to 40 K (−388 °F, −233 °C) 3...

Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus, and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun. This distance, called an astronomical unit (AU), is a standard unit of measurement in astronomy. Earth is one AU from the sun. The planet Jupiter is about 5.2 AU from the sun—about 778 million kilometers (483.5 million miles). Earth is the largest and most massive of the rocky inner planets, although it is dwarfed by the gas giants beyond the Asteroid Belt. Its diameter is about 12,700 kilometers (7,900 miles), and its mass is about 5.97×1024 kilograms (6.58×1021 tons). In contrast, Jupiter, the largest planet in the solar system, has a diameter of 143,000 kilometers (88,850 miles), and its mass is about 1,898×1024 kilograms (2093×1021 tons). Earth is an oblate spheroid. This means it is spherical in shape, but not perfectly round. It has a slightly greater radius at the Equator, the imaginary line running horizontally around the middle of the planet. In addition to bulging in the middle, Earth’s poles are slightly flattened. The geoid describes the model shape of Earth, and is used to calculate precise surface locations. Earth has one natural satellite, the moon. Earth is the only planet in the solar system to have one moon. Venus and Mercury do not have any moons, for example, while Jupite...

The Moon is the Planet Earth’s only natural satellite. This means that it is the only satellite not put into Earth’s orbit by humankind. Planets can have more than one moon. For example, Jupiter has 79 known moons orbiting it. Planet Earth just has one moon that often goes by the name of “Luna.” The Moon is located approximately 384,633 km away from Earth, and has a diameter that is just 1/81 of Earth’s diameter. This may sound tiny, but it makes it the largest moon in the solar system relative to the size of the planet that it orbits. Humankind visited the Moon for the first time in 1969 with the Apollo missions and now, fifty years later, there are plans to return with the Artemis missions. Image Source: “The Moon tonight”by JanetR3is licensed with CC BY 2.0. How was the Moon formed? There are a variety of hypotheses about how the Moon was formed. The most widely accepted hypothesis suggests that another astronomical body, similar to the size of Mars, collided with the Earth in the early days of its formation. The body that the Earth collided with has been named Theia. It is proposed that the collision led to rock and dust being ejected into Earth’s orbit. This rock and dust likely then coalesced to form the Moon, in a similar way to how the dust and gaseous material of the Solar Nebula formed the planets of the solar system. Figure 1. A depiction of the formation of the Moon. Why is the Moon important? The tidal rhythms on Planet Earth can be attributed to the gravitati...

LinkedIn and 3rd parties use essential and non-essential cookies to provide, secure, analyze and improve our Services, and to show you relevant ads (including professional and job ads) on and off LinkedIn. Learn more in our Select Accept to consent or Reject to decline non-essential cookies for this use. You can update your choices at any time in your Moon, the only natural satellite revolving around the Earth, primarily stabilizes the living planet’s axial wobble, thereby; helping maintain a constant climate and making Earth a habitable planet. Moon is the fifth largest among over 200 natural satellites that orbit planets in our solar system. Here is an in-depth look into the various facets of the moon: Structure The moon is primarily comprised of three layers – core, mantle and crust. Moon has a comparatively smaller core than other terrestrial bodies, with a solid inner core of a radius of 149 miles and a 56 miles shell of liquid iron surrounding it. The liquid iron core is surrounded by a partially molten layer with a radius of about 93 miles. The mantle of the moon is the surface from the tip of the partially molten layer to the base and comprises mostly minerals olivine and pyroxene which are most likely the composition of the elements of magnesium, iron, silicon and oxygen. The upper surface or the crust of the moon traces amounts of titanium, uranium, thorium, potassium, and hydrogen. Formation Most reliable studies suggest that the moon was formed about 4.5 billio...

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A single orbit of our planet takes the Moon 27.3 Earth days - the same amount of time it takes for the satellite to also rotate once on its axis. As a result, half of the Moon's surface perpetually faces Earth. The other half (erroneously referred to as the dark side of the Moon, in spite of receiving the same amount of sunlight as the more familiar side) was finally seen for the This ' At the same time, the Moon is gradually inching away from our world, How was the Moon formed? It's widely accepted that the Moon was formed from the debris of a collision between an infant Earth and a planet roughly the size of Early in the Solar System's formation around 4.5 billion years ago, many emerging planets and protoplanets would have had overlapping and unstable orbits that brought them within range of colliding. An impact between two similarly-sized bodies could have vaporised both, leaving a mix of their molten minerals and heated gases swirling under the pull of gravity. Lighter elements and debris could have aggregated to form the Moon, with denser materials from Theia settling into a core for a 'rejuvenated' Earth to form around. Materials brought back by the Apollo missions largely support this hypothesis over other ideas, such as those that suggest the Moon was captured by Earth's gravity. This was easier to do in an era of tension between superpowers, which threatened a return to global conflict. Today, without this threat, similar programs would need good reasons to argue...