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Deep Sky Observing
[ Deep Sky Observing ]

·Astronomy: Deep Sky Observing - THE WEBB SOCIETY
·Astronomy: Deep Sky Observing - RECORDING METHODS
·Astronomy: Deep Sky Observing - OBSERVING TIPS
·Astronomy: Deep Sky Observing - HOW BRIGHT
·Astronomy: Deep Sky Observing - DEEP-SKY CATALOGS
·Astronomy: Deep Sky Observing
 

 
 
Astronomy & Telescope Astronomy: Solar Activity

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  Solar Activity Solar Activity: Astronomy: Solar Activity - THE SUNSPOT CYCLE

THE SUNSPOT CYCLE

In the nineteenth century, German amateur astronomer Heinrich Schwabe was systematically scanning the Sun's surface, hoping to catch in transit a planet then thought to be orbiting inside Mercury.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:37:08 CST (9 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity - Sunspot-OBSERVING SUNSPOTS

OBSERVING SUNSPOTS

As the Sun rotates on its axis, you can watch a group of sunspots travel from one edge of the disk to the other over a period of about 10 days. A few long-lived spots will come around for a second period of visibility.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:36:11 CST (9 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity - SUNNY SIDE UP

SUNNY SIDE UP

The most famous solar features are the sunspots. Records from China show that since ancient times, observers have noticed dark spots on the Sun. (These naked-eye observations were made when the Sun was low in the sky or partly obscured by fog, mist, or clouds. Do not try to copy their technique, however— many astronomers in antiquity probably went blind.)

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:35:14 CST (9 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity - SKETCHING SUNSPOTS

SKETCHING SUNSPOTS

Sketching sunspots is easiest using the projection method. Decide on a standard size of sketch—6 inches (150 mm) is common—and prepare blank forms ahead of time with a circle for the Sun's diameter and places to note date and time, weather, seeing conditions, and the equipment you used.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:34:22 CST (9 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity - Radio Signal-SUNNY RADIO SIGNALS

SUNNY RADIO SIGNALS

Because most cosmic radio signals are very weak, radio astronomy demands large, sophisticated equipment. The Sun, however, the strongest radio source in the sky and this presents opportunities to the amateur with an interest in electronics.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:33:16 CST (9 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity - DOES THE SUN VARY

DOES THE SUN VARY?

Compared to some stars, which can vary in apparent brightness by factors of a hundred or more, the Sun seems like constancy itself. On the other hand, there are those 11-year sunspot cycles. Furthermore, astronomical history shows that sunspots can virtually disappear for decades on end, with notable climatic consequences.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:32:09 CST (8 reads)
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  Solar Activity Solar Activity: Astronomy: Solar Activity

SOLAR ACTIVITY

The surface of the Sun is a spectacular, turbulent place, and signs of intense solar activity, such as solar flares and sunspots, can be seen from Earth.

 
 
  Posted by astronomy on Tuesday, December 07 @ 13:31:21 CST (9 reads)
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