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Lunar eclipses are relatively frequent, with lunar eclipses averaging a little less than once a year, but on July 27, 2018 The longest lunar eclipse of the century will take place, with a number of spectacular features that have not occurred in more than 18 years. (Alan Dyer / VW PICS / UIG via Getty Images)
June 27, 2018 The longest total lunar eclipse of the centennial will last 1 hour, 42 minutes and 57 seconds, four minutes less than the maximum possible theoretical duration, the totally overshadowed phase of the Moon being visible on portions of six continents, There will be 230 lunar eclipses in the 21st century, including 85 lunar eclipses, but there is a special set of conditions that must align to create one that lasts the longest possible time. that the shadow of the Earth falls near s or even on the full moon, what's going on this month is something really special. Here is the science of what is happening.
For an eclipse to occur, the Moon's orbit nodes must align with the Earth-Sun plane during a new moon or full moon. Having this alignment with the moon at the apogee and with the Earth near the aphelion is a very rare occurrence. James Schombert / University of Oregon
The Earth revolves around the Sun in an ellipse, while the Moon revolves around the Earth in its own elliptical orbit. These orbits share some common properties, but are also different in some important ways.
When the Sun, the Earth and the Moon align properly, and the Moon passes completely through the parasol shadow of the Earth, a total lunar eclipse occurs. But there is a combination of factors that combine to make an eclipse as long as possible. Each of them leads to consequences that we can observe. For the cautious skywatcher, the sights can be rewarding like no other. Here are the top five things you should look for, as well as the science of their importance.
A perigee in full moon compared to a full apogee moon, where the first is 14% larger and the second 12% smaller than the other. The longest possible lunar eclipses correspond to the smallest full moons of the apogee Tomruen
1.) This eclipsed Moon will appear much smaller than a typical full moon . Although the Moon orbits around the Earth in an almost circular orbit, there is a difference between its closest point to Earth (perigee) and its furthest point from Earth (apogee) in each orbit. We have known for more than 400 years – since the time of Kepler – that objects that rotate to the farthest point of their orbit move the slowest.
If that were true, then the longest lunar eclipse of the century should occur lunar apogee; slow speed should outweigh the relatively smaller size of the Earth's umbrella shadow. That holds! The lunar climax occurs on July 27: the same day as the lunar eclipse, with the Moon at 406,223 km from the Earth: only 502 km from the maximum possible apogee over the 5,000 last years. In total, see a Moon 12% smaller in diameter than your biggest supermons!
During most total lunar eclipses, a partial eclipse is followed by a dark red that takes the moon on one side, with one remaining limb remaining brighter and whiter than the other. Because the Moon will pass to the center of the Earth's shadow, the Moon will appear almost uniformly red during the fullest peak on July 27, 2018. (KAZUHIRO NOGI / AFP / Getty Images)
2.) During the maximum totality, the Moon should be abnormally, uniformly red all around . In order to obtain a total lunar eclipse, the Moon must completely pass in the path of the Earth's shadow. But for the longest possible eclipse, there must be a perfect alignment between the Sun, the Earth and the Moon; it means that the Moon should pass perfectly in the middle of the Earth's shadow.
The eclipse of July 27, 2018 will see the Moon pass almost to the center of the Earth's shadow, thus ensuring one of the most aligned eclipses of the 21st century. century. In combination with a number of other factors, this will result in the longest eclipse of the century. Tomruen / Wikimedia Commons
The eclipse of July 27, 2018 is closer than any other eclipse of this century criterion. At the point of maximum eclipse, which occurs at 20:21:44 Universal Time, the Moon will appear almost perfectly, uniformly red. (It will be just slightly north of the center of the Earth's shadow.) At other times, not maximally during this eclipse, as well as during other eclipses, the parts closest to the Edge of the Earth's shadow will appear whiter because less blue light is scattered. Enjoy the most red natural moon you have ever seen in your lifetime.
In April 2014, a total lunar eclipse occurred near Mars (top right) in the sky. On July 27, 2018, Mars will spectacularly eclipse the Moon completely overshadowed to the fullest of all Sodai Gomi / flickr
3.) The full moon eclipsed will be so weak that Mars will eclipse it . The moon is normally the brightest object of the night sky, even in crescent phase. It's just too close to Earth, and the sunlight that it reflects can turn an otherwise virgin sky into a nightmare to behold. But during all, and especially at the maximum totality, it will become even darker than a new Moon. This marks the weakest and weakest state that the Moon will reach throughout the century.
In astronomy, the full moon is the brightest thing in the night sky; the fully eclipsed Moon will be about 1,000,000 times lower. The night of July 27, she will be extremely close to the planet Mars in the sky, which will be in opposition. For once, Mars and the Moon will be visible in the same portion of the sky, and Mars will be the brightest of the two while it represents only 1.5% of the angular size of the Moon. The planets Jupiter and Venus will also eclipse the eclipsed Moon, just like the brightest star: Sirius. Nearby, the planet Saturn and the star Canopus will be comparable in brightness to the eclipsed Moon. You will never see a full moon as dark
During the total lunar eclipse of July 27, 2018, the smallest (full) climax (Moon) appears smaller than the Sun at any time of the year. . However, the Sun aphelion seems smaller, which means that the Earth's shadow extends over a greater distance in space, making the eclipse a little more long Astrobin Ehsan Rostamizadeh
4.) The sun should be as close to its smallest view of the Earth . The Earth, during a year, also varies from about 3% of the Sun, from perihelion (its closest) to the aphelion (its farthest). Because the Earth is smaller than the Sun, the shape of its shadow is always a cone. But when the Earth is closer, the cone ends on a shorter distance, while when it is farther away, the cone moves further away. For the largest and longest shadow cone, we want the Earth closest to the aphelion.
A combination of photos taken and created on January 31, 2018 in Islamabad shows the moon during a lunar eclipse and allows sky observers to measure and reconstruct the size of the Earth's shadow on the surface of the Moon during the partial phases. (AAMIR QURESHI / AFP / Getty Images)
Perihelion, in 2018, occurred on January 3, while aphelion was a few weeks ago on July 6. On July 27, we will still be very close to the aphelion, which means that the Sun will always appear smaller than the average in the sky, and that the Earth's cone will be longer than the average. You can verify this in two ways: by measuring the size of the solar disk directly, during the day, or by looking at the shadow of the Earth on the Moon, and geometrically reconstructing the size of its shadow. Either way, it's a spectacular observation that a dedicated skywatcher can check for himself!
And finally …
The dark lunar lowlands known as Maria, craters, and even craters can be seen with binoculars or – power telescope directly, without filter, during the peak phases of 39, a total lunar eclipse. (Nick Ut / Getty Images)
5.) Binoculars or a telescope will allow you to see the incredible features of the Moon without additional filters . Normally, watching the moon through binoculars or a telescope is very hard on the eyes, and impossible without a special lunar filter due to the overwhelming brightness of the moon. But to look at the moon during the totality, or the partially eclipsed part of the totality before or after, gives a special treatment. Curiosities you should look for include:
Just before and after all, a tiny bit of the moon will be illuminated by direct sunlight, producing the blue band easily visible through a telescope. The effect is known colloquially as the "Japanese lantern" effect. Larry Johnson / Wikimedia Commons
Interestingly, the alignment between the Sun, the Earth and the Moon is repeated every 18 years, 11 days and 8 hours. The July 16, 2000 eclipse – the last time this exact alignment occurred – lasted 1 hour and 47 minutes. It marked the longest total lunar eclipse that the Earth will experience for the next 1000 years! Residents of North America, or other cloudy or daytime places, can always watch a live webcast, but nothing replaces such an event for yourself. Do not worry if you can not; the next lunar eclipse is only six months old, and you can even join me if you wish. No matter what, look up and enjoy; the night sky and all that it offers is a treat like no other!
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Lunar eclipses are relatively common, with total lunar eclipses occurring a little less than once a year, on average on July 27, 2018, the longest lunar eclipse of the century will have place, with a number of spectacular features that have not occurred in more than 18 years. (Alan Dyer / VW PICS / UIG via Getty Images)
On June 27, 2018, the longest lunar eclipse total of the century will take place.The Totality will last a phenomenal 1 hour, 42 minutes and 57 seconds: only four minutes below the maximum theoretical duration possible The totally overshadowed phase of the Moon will be visible through the portions Although it There are 230 lunar eclipses in the 21st century, of which 85 lunar eclipses, there is a special set of conditions that must align to create one, this lasts as long as possible.If the Earth's shadow often falls near or even on the p Leine Moon, what's going on this month is something really special. Here is the science of what is happening.
For an eclipse to occur, the nodes of the Moon's orbit must align with the Earth-Sun plane during a new moon or a full moon. Having this alignment with the moon at the apogee and with the Earth near the aphelion is a very rare occurrence. James Schombert / University of Oregon
The Earth revolves around the Sun in an ellipse, while the Moon revolves around the Earth. in its own elliptical orbit. These orbits share some common properties, but are also different in some important ways.
When the Sun, the Earth and the Moon align properly, and the Moon passes completely through the parasol shadow of the Earth, a total lunar eclipse occurs. But there is a combination of factors that combine to make an eclipse as long as possible. Each of them leads to consequences that we can observe. For the cautious skywatcher, the sights can be rewarding like no other. Here are the top five things you should look for, as well as the science of their importance.
A perigee in full moon compared to an apogee full moon, where the first is 14% larger and the last is 12% smaller than the other. The longest possible lunar eclipses correspond to the smallest full moons of the apogee Tomruen
1.) This eclipsed Moon will appear much smaller than a typical full moon . Although the Moon orbits around the Earth in an almost circular orbit, there is a difference between its closest point to Earth (perigee) and its furthest point from Earth (apogee) in each orbit. We have known for more than 400 years – since the time of Kepler – that objects that rotate to the farthest point of their orbit move the slowest.
If that were true, then the longest lunar eclipse of the century should occur lunar apogee; slow speed should outweigh the relatively smaller size of the Earth's umbrella shadow. That holds! The lunar climax occurs on July 27: the same day as the lunar eclipse, with the Moon at 406,223 km from the Earth: only 502 km from the maximum possible apogee over the 5,000 last years. In total, see a Moon 12% smaller in diameter than your biggest supermons!
During most total lunar eclipses, a partial eclipse is followed by a dark red taking the moon on one side, with a branch always brighter and whiter than the other. Because the Moon will pass to the center of the Earth's shadow, the Moon will appear almost uniformly red during the fullest peak on July 27, 2018. (KAZUHIRO NOGI / AFP / Getty Images)
2.) During the maximum totality, the Moon should be abnormally, uniformly red all around . In order to obtain a total lunar eclipse, the Moon must completely pass in the path of the Earth's shadow. But for the longest possible eclipse, there must be a perfect alignment between the Sun, the Earth and the Moon; it means that the Moon should pass perfectly in the middle of the Earth's shadow.
The eclipse of July 27, 2018 will see the Moon pass almost to the center of the Earth's shadow, thus ensuring one of the most aligned eclipses of the 21st century. century. In combination with a number of other factors, this will result in the longest eclipse of the century. Tomruen / Wikimedia Commons
The eclipse of July 27, 2018 is closer than any other eclipse of this century criterion. At the point of maximum eclipse, which occurs at 20:21:44 Universal Time, the Moon will appear almost perfectly, uniformly red. (It will be just slightly north of the center of the Earth's shadow.) At other times, not maximally during this eclipse, as well as during other eclipses, the parts closest to the Edge of the Earth's shadow will appear whiter because less blue light is scattered. Enjoy the most red natural moon you'll ever see in your life.
In April 2014, a total lunar eclipse occurred near Mars (top right) in the sky. On July 27, 2018, Mars will spectacularly eclipse the Moon completely overshadowed to the fullest of all Sodai Gomi / flickr
3.) The full moon eclipsed will be so weak that Mars will eclipse it . The moon is normally the brightest object of the night sky, even in crescent phase. It's just too close to Earth, and the sunlight that it reflects can turn an otherwise virgin sky into a nightmare to behold. But during all, and especially at the maximum totality, it will become even darker than a new Moon. This marks the weakest and weakest state that the Moon will reach throughout the century.
In astronomy, the full moon is the brightest thing in the night sky; the fully eclipsed Moon will be about 1,000,000 times lower. The night of July 27, she will be extremely close to the planet Mars in the sky, which will be in opposition. For once, Mars and the Moon will be visible in the same portion of the sky, and Mars will be the brightest of the two while it represents only 1.5% of the angular size of the Moon. The planets Jupiter and Venus will also eclipse the eclipsed Moon, just like the brightest star: Sirius. Nearby, the planet Saturn and the star Canopus will be comparable in brightness to the eclipsed Moon. You will never see a full moon as dark
During the total lunar eclipse of July 27, 2018, the smallest (full) climax (Moon) appears smaller than the Sun at any time of the year. . However, the Sun aphelion seems smaller, which means that the Earth's shadow extends over a greater distance in space, making the eclipse a little more long Astrobin Ehsan Rostamizadeh
4.) The sun should be as close to its smallest view of the Earth . The Earth, during a year, also varies from about 3% of the Sun, from perihelion (its closest) to the aphelion (its farthest). Because the Earth is smaller than the Sun, the shape of its shadow is always a cone. But when the Earth is closer, the cone ends on a shorter distance, while when it is farther away, the cone moves further away. For the largest and longest shadow cone, we want the Earth closest to the aphelion.
A combination of photos taken and created on 31 January 2018 in Islamabad shows the moon during a lunar eclipse and allows sky observers to measure and reconstruct the size of the Earth's shadow on the surface of the Moon during the partial phases. (AAMIR QURESHI / AFP / Getty Images)
Perihelion, in 2018, occurred on January 3, while aphelion was a few weeks ago on July 6. On July 27, we will still be very close to the aphelion, which means that the Sun will always appear smaller than the average in the sky, and that the Earth's cone will be longer than the average. You can verify this in two ways: by measuring the size of the solar disk directly, during the day, or by looking at the shadow of the Earth on the Moon, and geometrically reconstructing the size of its shadow. Either way, it's a spectacular observation that a dedicated skywatcher can check for himself!
And finally …
The dark lunar lowlands known as Maria, craters, and even craters can be seen with binoculars or – power telescope directly, without filter, during the peak phases of 39, a total lunar eclipse. (Nick Ut / Getty Images)
5.) Binoculars or a telescope will allow you to see the incredible features of the Moon without additional filters . Normally, watching the moon through binoculars or a telescope is very hard on the eyes, and impossible without a special lunar filter due to the overwhelming brightness of the moon. But to look at the moon during the totality, or the partially eclipsed part of the totality before or after, gives a special treatment. Curiosities you should look for include:
Just before and after all, a tiny bit of the moon will be illuminated by direct sunlight, producing the blue band easily visible through a telescope. The effect is known colloquially as the "Japanese lantern" effect. Larry Johnson / Wikimedia Commons
Interestingly, the alignment between the Sun, the Earth and the Moon is repeated every 18 years, 11 days and 8 hours. The July 16, 2000 eclipse – the last time this exact alignment occurred – lasted 1 hour and 47 minutes. It marked the longest total lunar eclipse that the Earth will experience for the next 1000 years! Residents of North America, or other cloudy or daytime places, can always watch a live webcast, but nothing replaces such an event for yourself. Do not worry if you can not; the next lunar eclipse is only six months old, and you can even join me if you wish. No matter what, look up and enjoy; the night sky and all that it offers is a treat like no other!
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