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Variable Star
[ Variable Star ]

·Astronomy: Variable Star - VARIABLE TERMS
·Astronomy: Variable Star - CLASSES OF VARIABLES
·Astronomy: Variable Star - Magnitude-HOW BRIGHT
·Astronomy: Variable Star - OBSERVING VARIABLE STAR
 

 
 
Astronomy & Telescope Astronomy: Meteor

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  Meteor Meteor: Astronomy: Meteor - Speed-SPEEDY METEORS

SPEEDY METEORS

When meteoroids enter our atmosphere, they travel at enormous velocities. Meteoroids that overtake Earth travel at about 6 miles per second (10 km/s). Those that plunge head-on into our atmosphere, however, can reach g speeds of 45 miles per second (75 km/s), more than 225 times the speed of sound.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:07:20 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Space Rock-ROCKS FROM SPACE

ROCKS FROM SPACE

When a meteoroid reaches the groand as meteorite, it can help complete our picture of the universe. Many meteorites are pieces of matter unchanged since the earliest days of the Solar System, while others are bits of Mars or the Moon blasted into orbit by comet or asteroid impacts.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:06:32 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Observing Meteor-WHEN TO OBSERVE

WHEN TO OBSERVE

While there is no need for expensive equipment, you do need to choose your observing time carefully. The table below gives the dates of peak activity for major showers. For the best observing times on those dates, however, you will need to check local newspapers, astronomy magazines, or the Internet. Because of Earth's rotation and orbital motion, the exact time of a shower's peak varies slightly each year, usually by about six hours. Also, the shower's radiant not be visible in your area at the time of maximum activity.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:05:40 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - METEOR STREAMS

METEOR STREAMS

Meteor showers and storms occur when Earth passes through a meteoroid stream, which is a trail of dust and debris that orbits the Sun.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:04:46 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Meteor Storm-SPORADICS, SHOWERS, AND STORMS

SPORADICS, SHOWERS, AND STORMS

On any moonless night, you should be able to see four or five meteors per hour. These unexpected shooting stars— or sporadic meteors—can appear anywhere in the sky. Their rate tends to increase from local midnight until dawn, when the observer's location is carried toward Earth's leading orbital edge and placed in the path of more interplanetary particles.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:04:03 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Meteor Shower-PREPARING FOR A METEOR SHOWER

PREPARING FOR A METEOR SHOWER

You do not need a telescope or binoculars to observe a meteor shower. The naked eye, in fact, makes the best instrument because of the large amount of sky it can take in at any one time. However, binoculars can help you locate fainter meteors.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:03:10 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Meteor Log

THE METEOR LOG

Some meteor watchers go on to pursue serious meteor observing. Should you decide to do this, your observations could contribute important information about the meteoroids in a particular stream.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:00:49 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - Leonid Meteor-THE LEONID METEOR STORM

THE LEONID METEOR STORM

One of the most famous meteor storms on record occurred on 17 November 1833, during the Leonid shower. All along North America's east coast—including Niagara Falls, New York —stunned observers saw hundreds of meteors per minute. They described the meteors as falling like snowflakes or heavy rain.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:59:45 CST (7 reads)
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  Meteor Meteor: Astronomy: Meteor - HOW MANY METEORS

h2>HOW MANY METEORS?

A meteor shower's activity is gauged by its zenithal hourly rate, or ZHR. This value, often quoted in the press and astronomy publications, has sometimes been the source of misunderstanding and disappointment.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:58:40 CST (8 reads)
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  Meteor Meteor: Astronomy: Meteors

METEORS

Whether you are wishing upon a shooting star or counting the hourly rate of the Leonid shower, meteors are sure to capture your attention.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:57:38 CST (6 reads)
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