Aquarius Eta meteor shower is coming! the largest number of medium-sized meteor rain meteor shower η Aquariusyear, more noticeable this year, as it has entered the peak period of 12 years! (Note: η is the Greek letter, read as' Eta, the ITAR ') Aquarius η meteor shower activity date mediator between April 19 - May 28, this year's great prediction in at 8:00 on May 6, ZHR can 40 to 85 per hour; but for Taiwan, the low elevation Aquarius by atmospheric effects, the number of actually seeing even less than forecast. Nike Air Presto These meteor fast (66 kilometers per second), brightness and so on an average of about 2 meteors are about 1/3 more than 1 second mark. Wherein, ZHR represents cloudless sky, darkest magnitude of up to 6.5, etc., and the meteor shower radiant point in the best condition zenith, the number of meteors visible per hour. At this time section, originally part of the constellation of Aquarius fall at about 1:30 am after only Dongsheng, before dawn in the south of the zenith. But this great period, until about 3:00 before the moon was setting. So timing is the best observation after at 3:00 on May 6, before the dawn of a short 1-2 hours only; although not yet to the prediction of 8:00, but this group of meteor shower great continuation of a very long time, in May 3 to 10, the number of background meteor estimates there are pieces of Nike Shox the grand ZHR ~ 30, this time in the morning before dawn can watch. Because of the low radiation point elevation, so large meteor track is very long, who are interested in estimating the angular velocity of the meteor researchers, it is quite favorable. Aquarius η Orion meteor shower meteor shower after October 20 are formed by the famous Halley's Comet (1P / Nike Shoes Halley) dust Nike Heels Boots particles left behind, may be due to gravitational perturbations by Jupiter has 12 years periodicity, the next peak on appeared in 2008 and 2010. Aquarius η meteor shower was an outbreak ZHR ~ 65 of 2008, Orion meteor shower also appeared three times more than Nike Basketball in previous years the average number, so meteor experts believe 2009 should pay more attention pay attention to changes in Air Jordan 5 Retro their numbers. Watch meteor shower, only in Air Jordan 3 Retro the light pollution and the spectacular view of the Department, with eyes to enjoy the whole sky. If you want to record with photography meteor shower, you can use a tripod digital camera or digital video camera, to the Air Jordan 4 Retro sky, Air Jordan 1 press the shutter, do long exposure photography (at least 10 seconds or more) can be. Alpine star tours, remember to keep warm; another spring has to be careful outdoor Chongyi like. Related graphics, available Nike Air Max on the [planetarium website / Astronomical Data] made under, welcome greater use. (Http://www.tam.gov.tw/cgi-bin/SM_theme?page=471813e9) Taipei Planetarium Website: www.tam.gov.tw