In meteorology, an anticyclone (that is, opposite to a cyclone) is a weather event where there is a downward movement of air and a high pressure area over the part of the planet's surface affected by it. It usually indicates clear skies. It has steady and calm wind moving away from its eye (cyclone).
Dvorak technique
The Dvorak technique (developed in 1974 by Vernon Dvorak) is a widely used system to subjectively estimate tropical cyclone intensity based solely on visible and infrared satellite images. Several agencies issue Dvorak numbers for cyclones of sufficient intensity. These include the National Hurricane Center's Tropical Analysis and Forecast Branch (TAFB), the NOAA/NESDIS Satellite Analysis Branch (SAB), the Joint Typhoon Warning Center at the Naval Pacific Meteorology and Oceanography Center in Pearl Harbor, Hawaii, and the Air Force Weather Agency (AFWA).
Grand Cayman
Grand Cayman is the largest of the three Cayman Islands at about 196 km² and contains the capital George Town. Towns on the island are referred to as "districts".
The island is a popular tourist spot because of its coral reefs. Snorkeling and scuba diving are popular activities.
Tägerwilen
Tägerwilen is a municipality of the district of Kreuzlingen in the canton of Thurgau in Switzerland.
Thundorf, Switzerland
Thundorf is a municipality of the district of Frauenfeld in the canton of Thurgau in Switzerland.
Tobel-Tägerschen
Tobel-Tägerschen is a municipality of the district of Münchwilen in the canton of Thurgau in Switzerland.
Uesslingen-Buch
Uesslingen-Buch is a municipality of the district of Frauenfeld in the canton of Thurgau in Switzerland.
Hydra (moon)
Hydra is the farthest moon of Pluto. It was found along with Nix in June, 2005 by the Hubble Space Telescope's Pluto Companion Search Team, which is composed of Hal A. Weaver, Alan Stern, Max J. Mutchler, Andrew J. Steffl, Marc W. Buie, William J. Merline, John R. Spencer, Eliot F. Young, and Leslie A. Young. The discovery images were taken on May 15, 2005 and May 18, 2005; the moons were independently found by Max J. Mutchler on June 15, 2005 and Andrew J. Steffl on August 15, 2005. The discoveries were announced on October 31, 2005, after confirmation by precoveries from 2002. The moons were provisionally designated S/2005 P 1 (Hydra) and S/2005 P 2 (Nix).
The moon orbits the barycenter of the system in the same plane as Charon and Nix, at a distance of about 65,000 km. Unlike other moons of Pluto, its orbit is only nearly circular; its eccentricity of 0.0052 is small, but significantly non-zero. Its orbital period of 38.2 days.
Although its size has not been directly measured, calculations based on its brightness give it a diameter of between 61 km, if its reflectivity is similar to Charon's 35 percent, and about 167 km, if it has a reflectivity of 4 percent like the darkest Kuiper belt objects (KBOs). At the time of discovery, Hydra was about 25 percent brighter than its sister moon Nix, which led to the assumption that its diameter was some 10 percent bigger. Pre-discovery data from Hubble observations in 2002-3 inferred that Nix was the brighter moon. However, Hubble observations in 2005-6, specifically targeting the dim moons, once again showed Hydra to be a little brighter. Hydra appears to be grey like Charon and Nix, though Pluto is reddish.
Hydra was to be visited along with Pluto by the "New Horizons" mission in 2015.
The name "Hydra" was announced on June 21, 2006, in IAU Circular 8723, along with the formal designation Pluto III. It was named after Hydra, the monster who guarded the waters of Pluto/Hades's underworld in Greco-Roman mythology.
5 Astraea
5 Astraea (written Astræa in the early literature) is a big main belt asteroid. Its surface is very reflective (bright) and what it's made of is probably a mixture of nickel-iron with magnesium- and iron-silicates. The adjectival form of the name, although unused, would be "Astraean" (which also designates a genus of star corals).
Astraea was the fifth asteroid found, on December 8, 1845 by K. L. Hencke. It was his first of two asteroid discoveries. The second was 6 Hebe. An amateur astronomer and post office employee, Hencke was looking for 4 Vesta when he stumbled on Astraea. The King of Prussia awarded him with an annual pension of 300 US$ (1968 dollars) for the discovery.
Photometry indicates prograde rotation, that the north pole points in the direction of right ascension 9 h 52 min, declination 73° with a 5° uncertainty. This gives an axial tilt of about 33°.
Astrea is physically unremarkable but notable mainly because for 38 years (after the discovery of Vesta in 1807) it had been thought that there were only four asteroids. In terms of maximum brightness, it is indeed only the "seventeenth brightest" main belt asteroid, being fainter than 192 Nausikaa and even, at rare near-perihelion oppositions, the highly eccentric carbonaceous 324 Bamberga.
After the discovery of Astraea, thousands of other asteroids would follow. Indeed, the discovery of Astrea proved to be the starting point for the eventual demotion of the four original asteroids (which were regarded as planets at the time) to their current status, as it became apparent that these four were only the biggest of a whole new type of celestial body.
There has been only one seen stellar occultation by Astraea (February 2, 1991).
Fred and George Weasley
Fred and George Weasley are characters in J.K. Rowling's "Harry Potter" series. They are twins and brothers of Harry Potter's best friend Ron Weasley; younger than Bill, Charlie, and Percy, but older than Ginny and Ron. They're in the middle of the seven Weasley children. They have red hair and are proud to be Weasleys. In the movies, both twins are tall and skinny. In the books they are described as shorter and stockier than Ron.
Although these two are not very big characters in the seven-book installment, they play some big roles in a few books. In "Harry Potter and the Prisoner of Azkaban", the twins show Harry the Marauder's Map that they found that leads to many useful and helpful things. In "Harry Potter and the Order of the Phoenix" (their seventh year), the two escape Hogwarts and the new Defense Against The Dark Arts teacher, Professor Umbridge and left a fantastic fireworks show and a giant "W". The students found it amusing and use the phrase "rolling a Weasley" to describe disappointment at something and wanted to go away. Fred and George are also involved in Harry's big study group that is called D.A. (Dumbledore's Army). In the beginning of "Half-Blood Prince", Ron, Hermione, and Harry, followed by Ginny, Mrs. and Mr. Weasley, visit the twins in their new joke shop. They are excited to see them and show all their new joke shop supplies. In "Deathly Hallows", Fred Weasley gets killed outside the room of requirement by an explosion presumably by Augustus Rookwood, breaking the hearts of many Harry Potter fans. George gets his ear accidentally cut off by Severus Snape using Sectumsempra. George marries Angelina Johnson.
Fred and George are usually described as determined, mischievous, and very sneaky. They get scolded by their mother, Molly Weasley for many things that they do (for example, Apparating right in front of her eyes in "Order of the Phoenix".)
The actors who portrayed Fred and George are James and Oliver Phelps respectively. Oliver is actually the older twin, but Fred is older than George. Two differences between the Phelps twins is that Oliver has a mole on the right side of his neck, while James does not and James has a slightly deeper voice than Oliver.
Nanyang Technological University
Nanyang Technological University (NTU) is one of the two largest public universities in Singapore. It is a fast-rising, research-intensive university with the biggest campus in Singapore and the world’s largest engineering college. Its 200-hectare Yunnan Garden campus was the Youth Olympic Village for the first Youth Olympics in 2010.