Moon Facts: Fun Information About the Earth’s Moon
Learn how Earth's moon formed, how its orbit affects Earth's tides, why Astrophotographer Anthony Lopez sent in a photo of the full moon taken in (27 percent) the size of Earth, a much smaller ratio () than any other. The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent The Moon's apparent size in the sky is almost the same as that of the Sun, since the .. Comparison of high-resolution images obtained by the Lunar. The moon is a bit more than one-fourth (27 percent) the size of Earth, a much smaller ratio () than any other planets and their moons. Earth's.
That is about 60 percent of Earth's density. The moon is the second densest moon in the solar system; Jupiter's moon Io is denser, with 3. The moon's gravitational force is only about A kilogram person would weigh lbs.
A person who can jump up 10 feet on Earth would be able to jump almost 60 feet on the moon. Like most of the solar system worlds, the moon's gravity varies based on its surface features. Super moon Because the moon's orbit is not circular, it is sometimes closer than at other times.
How Big Is the Moon? - The Size and Weight Compared to Earth
Perigee is the term for when the moon is closest to Earth. When a full moon coincides with perigee, we get a supermoon, which appears 14 percent larger and 30 percent brighter than usual.
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First applied by astrologer Richard Nolle in"supermoon" originally referred to a new or full moon that occurs when the moon is within 90 percent of its closest approach to Earth. The astronomical term for the phenomena is perigee-syzygy moon. The difference isn't always obvious; according to NASA"A 30 percent difference in brightness can be easily masked by clouds or the competing glare of urban lights.
How the 'Supermoon' Looks ] "The main reason why the orbit of the moon is not a perfect circle is that there are a lot of tidal, or gravitational, forces that are pulling on the moon," Petro told Space.
That's an average, however; the year boasted not one but three supermoons. The moon won't get as close to Earth as it got during the November supermoon until November 25, The year only has one supermoon, which will occur on December 3, The year will have two supermoons, both in January, with the first on January 2 and the second on January The January 31 supermoon will also occur during a lunar eclipse.
Horizon illusion A little-understood optical effect can make the moon seem bigger when rising behind distant objects on the horizon. This trick of the brain — known either as the moon illusion or the Ponzo illusion — has been observed since ancient times, but still has no generally accepted explanation. One theory holds that we're used to seeing clouds just a few miles above us, while we know that clouds on the horizon can be tens of miles distant.
Low tides occur between these two humps. The pull of the moon is also slowing the Earth's rotation, an effect known as tidal braking, which increases the length of our day by 2. The energy that Earth loses is picked up by the moon, increasing its distance from the Earth, which means the moon gets farther away by 1.
The moon doesn't escape from the interplay unscathed. A new study suggests that Earth's gravity stretched the moon into its odd shape early in its lifetime. Lunar eclipses During eclipses, the moon, Earth and sun are in a straight line, or nearly so. A lunar eclipse takes place when Earth gets directly or almost directly between the sun and the moon, and Earth's shadow falls on the moon.
A lunar eclipse can occur only during a full moon. Total Lunar Eclipse of Oct. A solar eclipse can occur only during a new moon. Solar eclipses are rare in a given location because the shadow of the moon is so small on the Earth's surface. The last total solar eclipse in the United States happened in Aug. Skywatcher Nick Rose took this photo of the total lunar eclipse Dec.
Nick Rose Seasons The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun. This means the Northern and Southern hemispheres will sometimes point toward or away from the sun depending on the time of year, varying the amount of light they receive and causing the seasons.
The tilt of Earth's axis is about As such, the moon virtually has no seasons. This means that some areas are always lit by sunlight, and other places are perpetually draped in shadow.
The Greeks also believed the dark areas of the moon were seas while the bright regions were land, which influenced the current names for those places — "maria" and "terrae," which is Latin for seas and land, respectively. The pioneering astronomer Galileo Galilei was the first to use a telescope to make scientific observations of the moon, describing in a rough, mountainous surface that was quite different from the popular beliefs of his day that the moon was smooth.
See the moon phases, and the difference between a waxing and waning crescent or gibbous moon, in this Space. See the full infographic. This spurred a series of uncrewed missions by both the Soviet Union and the United States to observe the moon's surface.
Many of these first probes were failures or only partially successful. However, over time, these early probes returned information about the moon's surface and geological history. Luna 2 was the first spacecraft to impact the moon in The first soft landing was achieved inby Luna 9. The United States sent astronauts to the moon's orbit and surface in the s and s. The first mission to the moon was inwhen the Apollo 8 astronauts orbited it. InApollo 11 landed the first astronauts on the moonundoubtedly the most famous of NASA's achievements, followed by five more successful missions and one, Apollo 13, that didn't make to the moon.
Their efforts returned lbs. It remains the only extraterrestrial body that humanity has ever visited. Scientists continue to study the rocks, and have made new discoveries as technology improved. For example, inwater was found in samples from Apollo 15, 16 and 17 — an interesting find given that previous analyses showed these rocks were quite dry. While crewed lunar missions concluded inrobotic exploration continued.
The Soviet Union remained active in robotic lunar exploration through the s and s, even as the Apollo astronauts landed there. The first lunar sample return mission took place with Luna 16 in Septemberafter multiple failed attempts with other missions. The Soviets also deployed the first robotic lunar rover, called Lunokhod 1, just two months later.
Earth - Mars - Moon Comparison
Lunokhod 2, which deployed inset an off-world distance driving record for more than 40 years, until the long-running Mars Opportunity rover mission surpassed it in after several years of driving. Also in the s, other space programs had advanced enough for new nations to begin exploring the moon themselves.
India launched Chandrayaan-1 inbut controllers lost contact with the spacecraft in InChina made history by landing a robotic rover on Earth's satellite. InLRO sent back the best moon map ever. Its high-resolution images of the moon's surface not only provided information about water and geology, but also pictures of the landing and crash sites of various spacecraft and rocket parts. Countries aren't the only entities exploring the moon.