The Lyrid meteor shower is approaching. The best time to view the show
er will be the evening of April 21st and morning of April 22nd.
The best way to view a meteor shower is to get a blanket or lounge and
just look UP! The meteors will appear anywhere and everywhere in the
sky.
You do NOT use binoculars or a telescope to view a meteor shower.
Meteors are actually the light that is produced when a meteoroid enter
s the Earth's atmosphere at a high rate of speed, super heats, and bur
ns up.
Therefore, a meteoroid is a small rock or grain of sand that is floati
ng in space. A meteor is the light that is produced when that meteoroi
d enters our atmosphere. A meteorite is what hits the ground if the me
teoroid does not burn up on entry. Many people have thought they found
a meteorite, but after analysis, it turned out to be just a rock. Thi
s is known as a "meteor-wrong"! (Sorry, a little astronomy humor there
).
If you want to take pictures of the meteor shower, it is VERY easy to
do.
All you need is a camera that will allow you to do time exposures by
locking open the shutter. Set the camera on a tripod, load it with 400
speed film, point the camera towards Lyra (see the chart on the web si
te),
use a shutter release, open the shutter for about 5-10 minutes per
exposure. If there are any meteors in the field of view, they will be
recorded on the film as streak running across the film. It is very
rewarding the first time you catch one on film!! Don't be afraid to
experiment....
--
雨想变成云
留一抹深紫色在天边
做我的唇印
吻所有的诱惑
吻所有的寂寞
不愿迷失在雨后的初晴.
※ 来源:．网易虚拟社区北京站 http://bj.netease.com．[FROM: 202.99.34.69]
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