Then one day, an accident occurred in his laboratory, causing Chemical X to undergo a strange transformation. He named this substance, "Chemical Z. Shortly afterward, a massive iceberg appeared in Tokyo City. Utonium's son, Ken, used the newly developed Chemical Z and concentrated it into a beam, destroying the iceberg, and releasing various black and white lights upon the city Thousands of years ago, there existed a properous civilization on the moon orbiting the Earth of Dimensional Sector SM, called Silver Millenium. One day, it came under attack by the demonic Dark Kingdom, and in the end, the moon kingdom was lost.
Queen Serenity, the ruler of Silver Millenium, sacrificed her life by using the mystical silver crystal, the Ginzuishou, to save the life of her daughter, her guardians, and the prince of Earth, Endymion, sending their souls to Earth to be reborn. The princess of the moon was reborn as Usagi Tsukino, a year-old living in Japan. After many events, trials, and tribulations, she had rediscovered her lost past, and with the help of her reborn guardians, now her friends, they defended the Earth from the Dark Kingdom, and again from the Black Moon family.
One year later, the peace they had fought for would soon be shattered Whether it be street thugs, mad scientists, or genetically enhanced mutants, the citizens of Jump City knew no rest. The only thing keeping the city from falling into total chaos was a group of young superpowered heroes: Recently, they have come across a mysterious new enemy, a skilled fighter and tactical genius known only as Slade. Leaving behind cryptic messages and a trail of obscure hints, he toys with the Titans, especially the team's leader, Robin The Holy Grail War of has begun once more.
Seven magi, called Masters, are given control of seven spiritual Servants, and battle to the death for the ultimate prize: A young man named Shirou Emiya, is unwittingly dragged into this conflict, and becomes a Master after summoning the Servant Saber. Having no desire for the Grail, Shirou only agrees to enter the battle in order to put an end to the fighting and killing it entails.
However, the only way to end the fighting is with more fighting All of these worlds are separate, but soon their destinies will be intertwined, and their futures, along with the future of all worlds, will rest in their hands Just In All Stories: Story Story Writer Forum Community. Part 1 of 3. A multi-series crossover, centered around the Nanoha series, and inspired by the Super Robot Wars franchise! Chapter 11b - Nanoha's group makes a stop in Sector MH, and encounter a new kind of enemy! Infinite Horizon Book 1: Dawn by Exdeathmore Prologue: Nautical dawn is the moment when the geometric center of the Sun is 12 degrees below the horizon in the morning.
It is preceded by morning astronomical twilight and followed by morning nautical twilight. Nautical dusk is the moment when the geometric center of the Sun is 12 degrees below the horizon in the evening. It marks the beginning of evening astronomical twilight and the end of evening nautical twilight. Before nautical dawn and after nautical dusk, sailors cannot navigate via the horizon at sea as they cannot clearly see the horizon. Sailors can take reliable star sightings of well-known stars, during the stage of nautical twilight when they can distinguish a visible horizon for reference i.
Under good atmospheric conditions with the absence of other illumination, during nautical twilight, the human eye may distinguish general outlines of ground objects but cannot participate in detailed outdoor operations. Nautical twilight has military considerations as well. The initialisms BMNT begin morning nautical twilight, i. This is partially due to tactics dating back to the French and Indian War part of the Seven Years' War of — , when combatants on both sides would launch attacks at nautical dawn or dusk. Astronomical dawn is the moment when the geometric center of the Sun is 18 degrees below the horizon in the morning.
Astronomical dusk is the moment when the geometric center of the Sun is 18 degrees below the horizon in the evening. After astronomical dusk and before astronomical dawn, the sky is not illuminated by the sun. However, some critical observations, such as of faint diffuse items such as nebulae and galaxies , may require observation beyond the limit of astronomical twilight. Theoretically, the faintest stars detectable by the naked eye those of approximately the sixth magnitude will become visible in the evening at astronomical dusk , and become invisible at astronomical dawn.
However, in other places, especially those with skyglow , astronomical twilight may be almost indistinguishable from night. In the evening, even when astronomical twilight has yet to end and in the morning when astronomical twilight has already begun, most casual observers would consider the entire sky fully dark. Because of light pollution , observers in some localities, generally in large cities, may never have the opportunity to view even fourth-magnitude stars, irrespective of the presence of any twilight at all, and to experience truly dark skies.source site
Asura Night by Fionn Jameson
This also occurs for most observers at higher latitudes on many dates throughout the year, except those around the summer solstice. However, at latitudes closer than 9 degrees to either Pole, the Sun cannot rise above the horizon nor sink more than 18 degrees below it on the same day on any date, this example of twilight cannot occur because the angular difference between solar noon and solar midnight elevates less than 18 degrees.
At latitudes greater than about These latitudes include many densely populated regions of the Earth, including the entire United Kingdom and other countries in northern Europe. In Arctic and Antarctic latitudes in wintertime, the polar night only rarely produces complete darkness for 24 hours each day.
This can occur only at locations within 5. At all other latitudes and dates, the polar night includes a daily period of twilight, when the Sun is not far below the horizon.
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Around winter solstice, when the solar declination changes slowly, complete darkness lasts several weeks at the Pole itself, e. At latitudes within 9 degrees of either Pole, as the sun's angular elevation difference is less than 18 degrees, twilight can last for the entire 24 hours.
This occurs for one day at latitudes near 9 degrees from the Pole and extends up to several weeks the further towards the Pole one goes. The only permanent settlement to experience this condition is Alert, Nunavut , Canada, where it occurs for a week in late February, and again in late October.
This angle of the sun's motion with respect to the horizon changes with latitude as well as the time of year affecting the angle of the Earth's axis with respect to the sun. At Greenwich, England At the equator , conditions can go from day to night in as little as 20—25 minutes. This is true because at low latitudes the sun's apparent movement is perpendicular to the observer's horizon. But at the poles, civil twilight can be as long as 2—3 weeks. In the Arctic and Antarctic regions, twilight if there is any can last for several hours. There is no astronomical twilight at the poles near the winter solstice for about 74 days at the North Pole and about 80 days at the South Pole.
As one gets closer to the Arctic and Antarctic circles, the sun's disk moves toward the observer's horizon at a lower angle.
The observer's earthly location will pass through the various twilight zones less directly, taking more time. Within the polar circles , twenty-four-hour daylight is encountered in summer, and in regions very close to the poles, twilight can last for weeks on the winter side of the equinoxes. Outside the polar circles, where the angular distance from the polar circle is less than the angle which defines twilight see above , twilight can continue through local midnight near the summer solstice.
The precise position of the polar circles, and the regions where twilight can continue through local midnight, varies slightly from year to year with Earth's axial tilt. The lowest latitudes at which the various twilights can continue through local midnight are approximately These are the largest cities of their respective countries where the various twilights can continue through local solar midnight:.
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Although Helsinki, Oslo, Stockholm, Tallinn, and Saint Petersburg also enter into nautical twilight after sunset, they do have noticeably lighter skies at night during the summer solstice than other locations mentioned in their category above, because they do not go far into nautical twilight. A white night is a night with only civil twilight which lasts from sunset to sunrise. At the winter solstice within the polar circle, twilight can extend through solar noon at latitudes below Twilight on Mars is longer than on Earth, lasting for up to two hours before sunrise or after sunset.
Dust high in the atmosphere scatters light to the night side of the planet. Similar twilights are seen on Earth following major volcanic eruptions. In Christian practice, " vigil " observances often occur during twilight on the evening before major feast days or holidays. For example, the Easter Vigil is held in the hours of darkness between sunset on Holy Saturday and sunrise on Easter Day — most commonly in the evening of Holy Saturday or midnight — and is the first celebration of Easter, days traditionally being considered to begin at sunset.
Twilight is sacred in Hinduism.
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Many rituals , including Sandhyavandanam and Puja , are performed at twilight hour. Eating of food is not advised during this time. Sometimes it is referred to as Asurasandhya vela.