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Listed
here are various links to other web pages that are related to the Sun
and which I have found useful and informative.
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The Astronomer.
This organisation is aimed at the active
astronomical observer. It issues a monthly magazine and email circulars
for rapid notification of astronomical discoveries and events. The
monthly magazine and web site include details of subscriber's solar observations.
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The British
Astronomical Association.
This organisation,
founded in 1890, has a
bimonthly Journal,
circulars, regular meetings and a variety
of
sections. One of these is the solar section that issues a monthly
newsletter giving a monthly summary of solar activity from member's
observations.
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The International
Sunspot Number is
the definitive indicator of
sunspot
activity.
It has been calculated daily from 1749. Currently the Sunspot Index
Data Center of the Observatoire Royal de Belgigue is responsible for
its derivation. Daily, monthly, smoothed monthly and yearly averaged
values are available in addition to various plots of this sunspot
number.
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The Sky
& Telescope
magazine has several articles
relating to
the Sun
available on their web site. One of these is on how to observe the Sun
safely.
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The Society
for Popular Astronomy
have a solar section
web page that
contains an informative
article on
solar observing.
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The SOHO
spacecraft, a joint ESA/NASA mission, observes the Sun at a variety of
wavelengths and produced spectacular solar images and results. These
include excellent recent white light images (select the SOHO MDI
Intensitygram, Full Disk images for a date selected from the Soho
Summary Data column of the latest images
page). There is also a NASA
mirror web site.
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Details
of future solar eclipses can be found on NASA's web site.
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The Space
Weather Prediction Center
of NOAA
provided information on today's
space
weather. This site includes current images of the Sun in white light
and H-alpha from several professional solar observatories around the
world.
Last
updated on
22 April 2002.
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