From Quadrantids to Geminids: Meteor showers to watch out for in 2018

Mound of the Dead, Sindhi: The ruins of the city were discovered in by Rakhaldas Bandyopadhyay, an officer of the Archaeological Survey of India. He was led to the mound by a Buddhist monk, who believed it to be a stupa. In the s, massive excavations were conducted under the leadership of John Marshall, K. Dikshit, Ernest Mackay, and others. When excavations of Harappa and Mohenjo-Daro reached the street level, they discovered skeletons scattered about the cities, many holding hands and sprawling in the streets as if some instant, horrible doom had taken place. People were just lying, unburied, in the streets of what once happened to be a sprawling metropolis. And these skeletons are thousands of years old, even by traditional archaeological standards. What could cause such a thing? Why did the bodies not decay or get eaten by wild animals?

Egyptian calendar

The author of this page will appreciate comments, corrections and imagery related to the subject. Please contact Anatoly Zak. Meteor spacecraft family An early version of the Meteor satellite. The Meteor satellite in its original configuration.

The Age of the Earth How do we know the Age of the Earth? Radiometric dating Adapted from The Age of the Earth, by the Branch of Isotope Geology, United States Geological Survey, Menlo Park, California How do we know the Age of the Earth?. The Earth is a constantly changing planet.

Gibeon Meteorite Facts, Information and Description Since it was first discovered in in Great Namaqualand, Namibia, Africa, more than 25 tons of Gibeon meteorites have been recovered and although export and sale was banned by the Namibian government, it is still one of the most commonly available meteorites on the market today. The Gibeon meteorites come from broken asteroid fragments or an exploded star and radiometric dating places the age at around 4 billion years old.

Gibeon meteorites are composed of iron, nickel and small amounts of cobalt and classified as a fine octahedrite iron meteorite. Some other minerals that may be found in the meteorite are chromite, deabreelite, enstatite, kamacite, taenite, troilite or tridymite. Lines and patterns are the result of cooling in outer space over billions of years and etching slices with dilute nitric acid allow these patterns known as “Widmanstatten lines” to be more visible. Until recent years, most Gibeon meteorites that were recovered weighed between and pounds.

One of the largest masses ever found weighed over pounds. Probably due to better metal detection equipment, many smaller specimens have been recovered recently. When a meteorite enters the Earth’s atmosphere, friction raises the surface temperature above its melting point. As the meteorite descends, it slows down, and the heat from friction decreases resulting in a thin layer of dark glass. The surface on some meteorite’s may develop shallow pits during the entry process and these pits resemble thumb prints and are known as regmaglypts.

Imagine bread dough that has been kneaded which leaves finger imprints in the dough ball. Kalahari Desert tribesmen picked up meteorites that lay on the ground’s surface and made arrowheads and assagai-heads, a javelin type weapon made of long, thin pointed iron rods with sharp edges. Meteoric iron is used for alignment and balancing; it symbolizes the aptitude and strength required for endurance.

Classic Boat Find: 1958 Lone Star Meteor

See my copyright notice for fair use practices. Select the photographs to display the original source in another window. Links to external sites will be displayed in another window. Terrestrial planets have hard surfaces that can be re-shaped by several different processes:

Meteorite Strike. A meteor ripped across the sky in central Russia on Friday, injuring hundreds. In the city of Chelyabinsk, the impact caused explosions and sent broken glass out from windows.

Geology[ edit ] Beside the Pindos Mountains , in the western region of Thessaly , these unique and enormous columns of rock rise precipitously from the ground. But their unusual form is not easy to explain geologically. They are not volcanic plugs of hard igneous rock typical elsewhere, but the rocks are composed of a mixture of sandstone and conglomerate. The conglomerate was formed of deposits of stone, sand and mud from streams flowing into a delta at the edge of a lake, over millions of years.

About 60 million years ago during the Paleogene period [5] a series of earth movements pushed the seabed upwards, creating a high plateau and causing many vertical fault lines in the thick layer of sandstone. The huge rock pillars were then formed by weathering by water, wind and extremes of temperature on the vertical faults.

It is unusual that this conglomerate formation and type of weathering are confined to a relatively localised area within the surrounding mountain formation. This type of rock formation and weathering process has happened in many other places locally and throughout the world, but what makes Meteora’s appearance special is firstly the uniformity of the sedimentary rock constituents deposited over millions of years leaving few signs of vertical layering, and secondly the localised abrupt vertical weathering.

The cave of Theopetra is located 4 kilometres 2. Its uniqueness from an archeological perspective is that a single site contains records of two greatly significant cultural transitions:

VIDEO: ‘Weird green lights’ seen above Bradford as meteor lights up night sky

He falls for her, while she has a crush on his friend, Hua Ze Lei Chen. Shan Cai and Si experience several ups-and-downs as they get to know one another. Shan Cai stands up to him for not accepting her friend’s apology. Afterwards, Si sends her a Joker card and begins bullying her at school. He later orders food from her family’s business and throws it at her, when she calls him a “parasite”.

Michelle H. guest posting today with a date idea that tops the charts in the romance department!! There is something so out-of-this-world-intimate about snuggling up in blanket, in the dark, under the stars, and watching a meteor shower together.

A Guide to the Night Sky Lyrid Meteor Shower by admin The Lyrid meteor shower, also known as the April Lyrids, is one of the oldest known meteor showers, with records dating back more than 2, years. The Lyrids are an annual event that peaks around April 22 and the early morning of April 23 each year. Lyrid meteors can typically be seen from April 16 to April When the meteor shower peaks, observers can usually see between 5 and 20 Lyrid meteors per hour.

The average zenithal hourly rate is 10 meteors per hour. More Lyrid meteors can be seen from rural areas than from cities, and the meteor shower puts on a bigger spectacle when it is not obscured by the light of the Moon. The best time to observe the Lyrids is in the hours just before dawn. In , the meteor shower is expected to produce 10 to 20 meteors per hour and the waxing crescent Moon will not obscure the view.

On the night of April 21, the Lyrid meteor shower peaked in the skies over Earth. Pettit The Lyrids are typically around magnitude 2, but some of the brighter meteors, known as the Lyrid fireballs, have been known to briefly cast shadows before leaving behind trails of debris. The trails of the Lyrid fireballs can stay visible for minutes.

The radiant point of the Lyrid meteor shower is near the star Alpha Lyrae proper name Vega , the brightest star in the constellation Lyra the Harp. Although the meteors appear to radiate from a point in the sky near the bright star Vega, they are not truly associated with this distant star.

Lyrid Meteor Shower

Although the meteor shower goes on for several weeks, it has a short peak of around six hours which is estimated to be around It will be visible near the Big Dipper constellation, but star-gazers will have to battle with remains of the recent ‘wolf moon’ to see the spectacular meteor shower. This stunning meteor shower is the one most astronomers miss because it is very brief and intense, making it hard to predict. Scroll down for video Star and auto trails with a Quadrantid Meteor above Mt.

The site is in northern Adams County, about miles from Cleveland. “We have tentative signs of a meteor,” said Mark Baranoski, a geologist with the Ohio Department of Natural Resources.

The ancient Egyptians originally employed a calendar based upon the Moon, and, like many peoples throughout the world, they regulated their lunar calendar by means of the guidance of a sidereal calendar. They used the seasonal appearance of the star Sirius Sothis ;… The Egyptian lunar calendar , the older of the two systems, consisted of twelve months whose duration differed according to the length of a full lunar cycle normally 29 or 30 days.

Each lunar month began with the new moon—reckoned from the first morning after the waning crescent had become invisible—and was named after the major festival celebrated within it. Since the lunar calendar was 10 or 11 days shorter than the solar year, a 13th month called Thoth was intercalated every several years to keep the lunar calendar in rough correspondence with the agricultural seasons and their feasts.

The Egyptian civil calendar was introduced later, presumably for more-precise administrative and accounting purposes. It consisted of days organized into 12 months of 30 days each, with an additional five epagomenal days days occurring outside the ordinary temporal construct grouped at the end of the year. There was apparently no attempt to introduce a leap-year day to compensate for the slippage of one day every four years; as a result, the civil calendar slowly rotated through the seasons, making a complete cycle through the solar calendar after 1, years referred to as a Sothic cycle.

The months were named after those of the lunar calendar, and both systems of reckoning were maintained throughout the pharaonic period. The Egyptian civil calendar was altered by Julius Caesar about 46 bce with the addition of a leap-year day occurring once every four years; the revised system forms the basis of the Western calendar still used in modern times.

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Methods of Dating the Age of Meteorites Meteorites are among the oldest objects we know about – formed about 4. But how do scientists know this? This article describes the principles and methods used to make that determination.

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What exactly is a meteor shower? Something larger than a grape will produce a fireball and this is often accompanied by a persistent afterglow known as a meteor train. This is a column of ionised gas slowly fading from view as it loses energy. Meteor, meteorid or meteroite? Let’s get this straight. Meteoroids that reach the Earth’s surface without disintegrating are called meteorites. Meteors are mostly pieces of comet dust and ice no larger than a grain of rice. Meteorites are principally rocks broken off asteroids in the asteroid belt between Mars and Jupiter and can weigh as much as 60 tonnes.

Yuri Smityuk Scientists think about 1, tons to more than 10, tons of material from meteors falls on Earth each day, but it’s mostly dust-like grains, according to Nasa, and they pose no threat to Earth.

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