流星雨英文PPT(Meteor shower and its observation)

Leonid （狮子座） The Leonid meteor shower peaks around 17 November of each year.
Approximately every 33 years, the Leonid shower produces a meteor storm, peaking at rates of thousands of meteors per hour.
When you talk about meteor shower……
• romance • lucky • disappointed
When you talk about meteor shower……
• romance • lucky • disappointed • F4
• What is meteor shower? • How to observe meteor shower?
• The radiant point (辐射点)
The radiant of a shower is the point in the sky from which the meteors appear to come. Meteor showers are usually named for the constellation（星座） in which their radiant lies at the peak of the shower…
Meteor shower and its observation
By Liu Kai lklkmymym@
When you talk about meteor shower……
• romance
When you talk about meteor shower……
• romance • lucky
13 November, 1833 Heaven on fire!
ZHR>35,000 Each people could see 240,000 meteors during nine hours.
How to observe……
1.When? professional prediction
• ZHR • Whether • Moon • Equipment
How to observe……
• ZHR • Whether • Moon • Equipment
• Attitude
Good Luck and enjoy the meteor shower
The end
Tanks
How to observe……
• ZHR
if ZHR>= 50, you can have a try.
How to observe……
• ZHR • Whether
晴天钟 (7timer)
How to observe……
• ZHR • Whether • Moon
How to observe……
@北京天文馆朱进 @天象预报
How to observe……
1.When? professional prediction 2.Where? light pollution safety
How to observe……
1.When? professional prediction 2.Where? light pollution safety 3.Method? believe your eyes
Zenithal Hourly Rate （天顶每小时流星出现率） (ZHR) of a meteor shower is the number of meteors a single observer would see in one hour under a clear, dark sky.
Perseids（英仙座） The most visible meteor shower in most years is the Perseids, which peaks on 12 August of each year at over one meteor per minute.
Tears of St. Lawrence
Geminids （双子座）
This is one of the best meteor showers of the year and never seems to disappoint observers. peak on December 13/14 of 50-80 meteors per hour.
Fireworks
Long exposure photography
Comet 彗星
Iridium Flare 铱星闪光
• A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point small fragments of comet debris（彗 星残片） entering the earth’s atmosphere at extremely high speeds…when the Earth’s orbit （轨道） & the comet’s orbit intersect at same point.