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Here is
my personal selection of Solar Astronomy books.
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'The Greatest
Sunspot Groups' by Peter Meadows. Self-Published, 2021.
ISBN 978-0-9570789-1-8. Pp iv + 98.
This
A5 book describes the passage across the solar disk of the seven
greatest recorded sunspot groups - five were between 1946 and 1951 and
the others from 1989 and 2014. In addition, the passage of
a further 24 great groups are shown as well an area measurement of the
Carrington Event sunspot group from 1st September 1859. Below are shown
the cover, contents and two example pages.
A
free PDF version of the book is available to download
(9 MB).
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'Nature's
Third Cycle' by Arnab Rai
Choudhuri. Oxford
University Press, 2014.
ISBN 978-0-19-967475-6. Pp xii + 281.
Initially
I was curious about exactly what the
third cycle in title of this book referred to. It soon became clear
that this is
the well known 11 year solar cycle, with the first and second cycles
referring
to the Earth’s daily rotation and yearly orbital cycles.
Perhaps
less well know
is that the solar cycle is on average 22 years in duration when the
magnetic
properties of sunspots is taken into account.
It
is these magnetic properties that are the main
topic of this
interesting and informative book.
This
book by Arnab Rai Choudhuri, a Professor of
Physics at the Indian Institute of Science, has been written for a
general
audience and in a non-mathematical style that anyone with GCSE level
physics
will be able to easily understand. The more complicated physics and
maths are
given in the appendixes. The book begins by giving the background and
history
to the topic of sunspots and in particular their magnetic
characteristics
before describing the properties of the fourth state of matter, plasma.
This is
where the reader is gently introduced to the solar dynamo theory which
is
subsequently used to explain the origin of the solar cycle as indicated
by
sunspots. The book then develops the flux transport dynamo theory, the
currently favoured theoretical model of the solar cycle. This model has
been
used, for example, to give a theoretical butterfly diagram which is
well known
to solar observers. The final part of the book concentrates on how
particles
from the Sun can be transported to the Earth and their influence on us
here on
Earth.
What
I particularly like with this book is that the
author has included stories about the various scientist and astronomer
who have
contributed to the understanding of the solar cycle, including his own.
This
gives a much more personal and interesting prospective to the book
especially
as it helps to explain the development of the topic as well as giving
an
insight to the scientific process with its highs and lows. Having this
from the
prospective of a scientist in India has added to this personal aspect
of this
book.
In
the preface, the author asks whether he has
succeeded in writing on non-technical book to explain the physics
behind the
solar cycle – I certainly think he has. I recommend this book
to
anyone who
wishes to gain an insight into solar physics. There may be
parts of the book that need some thought and understanding but this is
worth
the effort. This is the best book I’ve read on this topic.
(Review by Peter Meadows
reproduced from The British
Astronomical Journal
Vol 125, No 2, April 2015).
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'How
to Observe
the Sun Safely' by Lee Macdonald.
Springer-Verlag, 2012.
ISBN 978-1-4614-3824-3. Pp xxv + 214.
An updated and extended of version of the first edition
published in 2003 (see below). New chapters on white light and hydrogen
alpha imaging the Sun with digital cameras and webcams have been
included to bring the topic up to date.
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'The
Sun Kings: The Unexpected
Tragedy of Richard Carrington and the Tale of How Modern Astronomy
Began' by Stuart Clark.
Prinston University Press, 2007.
ISBN 978-0-691-14126-8. Pp xii + 211.
A very readable and enjoyable account of the life and time of Richard
Carrington who was the first to record a solar flare.
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'How
to Observe
the Sun Safely' by Lee Macdonald.
Springer-Verlag, 2003.
ISBN 1-85233-527-0. Pp ix + 176, £19.50 (paperback).
Here is a book that
is ideally suited to someone who
has recently begun solar observing or who is contemplating observing
our nearest star. Lee Macdonald, a BAA solar section member, gives his
expertise on solar observing in this easy to read book. After giving a
brief description of the Sun, he describes what equipment can be used
to observe the Sun in white light and how to use it in a safe manner.
He then continues by describing what can be seen, how to make sunspot
drawings and determine the position of sunspot groups. Now that an
observer knows how to record solar activity, the next chapter shows how
various measures of solar activity, such as the number of active areas
and sunspot number, can be made in a form suitable for submission to
astronomical organisations such as the BAA. Observing other white light
features are also described - faculae, naked-eye sunspots and if you
are extremely lucky, white-light flares. The remainder of the book is
devoted to hydrogen-alpha observing and photography using film and
digital techniques. The appendices give a list of equipment suppliers,
solar observing organisations and further reading.
The book is
particularly error free, although I
would have liked to have seen further clarification in a few parts.
These include a clear statement on how to count the number of spots if
there are many umbrae in the same penumbra and a clearer description of
the orientation of the Sun for different telescope configurations
(including the orientation for southern hemisphere observers). Also
more details of the McIntosh sunspot group classification could have
been given, as this is a little bit more involved than described in the
book.
As expected for a
book from Patrick Moore's
Practical Astronomy series, there is sufficient information to enable
readers to make their own useful solar observations. I think that the
book successfully describes how to observe the Sun safely and how to
make the most of any observation. Let's hope that more observers will
be encouraged, after reading this book, to observe the Sun and to
submit their own observations to the BAA and other such organisations.
(Review by Peter Meadows
reproduced from The British
Astronomical Journal
Vol 113, No 3, June 2003).
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'The
Enigma of
Sunspots' by Judit Brody.
Floris Books, October 2002.
ISBN 0-86315-370-4. Pp 192, £12.99 (paperback).
The subtitle for this
book is 'A story of discovery and scientific revolution' but I think a
better subtitle that would summarise the book is 'Solar observers
throughout the ages and how our understanding of the Sun has changed
through their observations'. After an introductory chapter there are a
couple of chapters on pre-telescopic sightings of sunspots and the
difficulties these posed for the idea of an unchanging Sun. Early
telescopic observations by Johann Fabricius and Christoph Scheiner are
then described together with the correspondence the latter had with
Galileo. Scheiner's book Rosa
Ursina published in
1630 contains many properties about the Sun that we are familiar with
today: sunspots are on the surface of the Sun, the Sun rotates with a
period of 27 days, the 7° orientation of Sun's rotation axis,
sunspots occupy definite zones on the solar surface and the presence of
faculae. He also organised a network of observers, some a far away as
the West Indies, to send him observations! There is a short chapter on
the English observer Thomas Harriot who first started solar observing
in December 1610. The book continues with observers Pierre Gassendi,
Johannes Hevelius and Athanasius Kircher. Kircher thought the Sun to be
a hot place (one of his drawings shows flames coming from the solar
surface) and that it has an influence on the Earth (but through
astrology). Following the end of the Maunder sunspot minimum in about
1715 activity increased again, as did the occurrence of aurora. In 1716
Edmund Halley saw a prominent aurora and tried to develop a magnetic
theory of auroras. The next breakthrough in the understanding of
sunspots came, the book suggests, in 1769 with the first observation of
the Wilson effect. We then come to a chapter on the ideas of the Sun by
Sir William Herschel which includes a description of an experiment by
the American Joseph Henry who in 1845 used a thermocouple to determine
that sunspots were cooler than the surrounding photosphere. Chapter 12
describes the realisation that solar activity follows a cycle, as
discovered by Heinrich Schwabe in the middle of the 19th century, and
the possibility of a connection between sunspot cycles and magnetic
disturbances here on Earth. Rudolf Wolf at about the same time managed
to obtain information about sunspots for about 22500 days and devise
his still used relative sunspot number. The next two chapters describe
observations of white light flares, differential rotation, the latitude
distribution of sunspots throughout a solar cycle (the Butterfly
diagram) and the Zeeman effect in sunspots. These all furthered our
understanding of the Sun and finally linked solar activity with
terrestrial magnetic effects such as aurora. The final part of the book
briefly describes advances in our understanding during the last century
and the impact the Sun has on the technology we use and possible links
with our climate.
I enjoyed reading this
book and found it interesting how some of the early solar observations
were made. The style is non-technical and so is suited to everyone.
Throughout the book there are many drawings and images of sunspots made
over the centuries, many of which I had not seen before. Who do I think
would also enjoy this book: all solar observers as it is interesting to
see how the solar surface has been depicted in the past and anyone who
is interested in the history of astronomy and wishes to learn more
about past solar observers and observations of the Sun.
(Review by Peter Meadows
reproduced from The Astronomer
magazine Vol 40, No 471, July 2003).
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'Storms
from the Sun'
by Michael
J.
Carlowicz & Ramon E. Lopez.
Joseph Henry Press,
July 2002. ISBN 0-309-07642-0, Pp 256, £19.95 (hardback).
This book, written by an
American science writer who worked for NASA and a Professor of Physics
at the University of Texas, has a sub title of 'The Emerging Science of
Space Weather'. The book begins by describing the impact of a satellite
failure on the users of pagers in the USA and asserts that this failure
could have been linked to a solar flare and a coronal mass ejection
that occurred a few days previously. The next chapter gives a
historical account of the solar corona (seen during solar eclipses),
the solar wind (via their influence on the tails of comets), aurora and
sunspots (including one of Galileo's disk drawings). Then there is a
short chapter on the observation of a white light flare by Richard
Carrington in September 1859, the subsequent magnetic storm and the
first thoughts on a possible connection between the two events. This
connection is expanded in the next chapter which included an intriguing
experiment by Norwegian physicist Kristian Birkeland almost 100 years
ago to simulate the aurora in his laboratory by firing beams of
electrons at a model of the Earth! Chapter 5 describes in more details
the various aspect of the Sun including the corona, sunspots, solar
flares, coronal mass ejections. The next five chapters describe the
impact of space weather on electrical power generation and
distribution, ground based communications systems, communications sent
via satellites, satellites hardware, radiation levels for astronauts
and even aircraft passengers plus the possible long term solar
influence on climate patterns here on Earth. There is also a chapter on
the current state of 'space weather' forecasting and how recently
launched satellite are helping to improve the accuracy of these
forecasts. The epilogue gives a prediction of possible impact of solar
activity on every day life at the peak of the next solar cycle in 2012
such as the diverting of flights over the polar regions and the
precautions required for space tourists in near earth orbit. Finally,
there is a list of selected reading, a set of selected web sites, more detailed notes for each chapter and
a
comprehensive index.
As someone who has an
interest in the solar observing, looking for aurora and working with
near-earth orbit earth observation satellites, I enjoyed reading this
book and learnt more about space weather and its impact on us and the
technology we use. The non-technical style and interviews with many
scientists involved in space weather also made the book very easy to
read - the last book I read of a similar style was 'Giotto to the
Comets' by Nigel Calder published 10 years ago. The book is well
written, although with a slight North American bias (which is
understandable given the authors backgrounds), and nicely published
with a set of colour plates in the middle of the book and black
& white pictures throughout. I thus recommend this book to
those of you with an interest in the Sun and the near earth environment
and/or to those of you that wish to learn more about the relatively new
topic of space weather.
(Review by Peter Meadows
reproduced from The Astronomer
magazine Vol 39, No 462, October 2002).
- 'Solar
Observing Techniques' by Chris
Kitchin. Springer-Verlag,
2002. ISBN 1-85233-035-X, Pp
xxi + 218 pages with colour plates, £24 (paperback).
This book forms part of
Patrick Moore's Practical Astronomy Series: the back cover states that
the book 'discusses all the precautions needed to ensure complete
safety whether looking at a solar eclipse or at the full solar disk'.
It also states that it 'also provides a detailed technical treatment of
all aspects of solar observations, including imaging and recording your
visual observations'. The topics covered include a general introduction
to the Sun and what can be seen, naked eye and telescopic observing
techniques, making and recording observations, solar eclipses,
specialist instruments and even using radio telescopes.
Well, does the book
satisfy its aims? I would certainly agree that it discusses the safety
precautions that need to be taken in such a way as to be informative
and not to scare someone from making solar observations. These
precautions are aimed, as is the book, at someone new to solar
observing. The book also gives sufficient information for someone, for
example, to attempt taking photographs or CCD images of the Sun.
However, when the book discusses image processing techniques, such as
enhancement or using smoothing or edge filters, the resulting images
shown are much poorer than the originals! The book has a quite lengthy
chapter on solar eclipses which although good and detailed, I think the
space could have been used better to expand on the relatively short
charter on observing programmes.
Throughout the main part
of the book, there are problems with the printing of some of the
photographs in that they are quite dark and some are even featureless
when the caption indicates that there should be something to see.
Fortunately the colour plates at the end of the book are good but it is
a pity that these are not referred to from the text. A few factual and
typographical errors were found. The main factual error was to state
that the sunspot number and other statistics that can be measured for
each solar observations are averaged over a period of 27 days (the
approximate synodic rotation period of the Sun) - in practice these are
averaged over the period of a calendar month. For typographical errors,
the most obvious problem was with the appendix that gives a list of
useful web sites, as around 50% of the web address are missing,
including that of the reviewers! It appears that the book was written
as couple of years ago, as it does not discuss and show some of the
excellent high resolution sunspot group images obtained by amateurs
using web cams and there is no mention of Coronado hydrogen alpha
filters.
I think this book will
encourage amateur astronomer to take up solar observing as it does give
enough information for someone to do so.
(Review
by Peter Meadows reproduced from The
Astronomer magazine
Vol 38, No 450, October
2001).
- 'Solar
Astronomy Handbook' by Rainer
Back, Heinz Hilbrecht, Klaus Reinsch, Peter Volker.
Willmann-Bell, 1995. ISBN 0-943396-47-6, Pp xvii + 516 pages,
(hardback).
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'Observing
the Sun' by Eric Strach.
Liverpool Astronomical Society,
1992. Pp 10, £1.50 (softback).
This booklet gives
information on observing the Sun in white-light from the Eric Strach's
experience of solar observing. It has sections on equipment, alignment
and orientation, making an observation, working out coordinates and
evaluating solar activity. It is available from the Liverpool
Astronomical Society
publications web page.
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'The
Sun in Hydrogen Alpha' by Eric Strach.
Liverpool
Astronomical Society, 1992. Pp 11, £1.50 (softback).
This booklet gives
information on observing the Sun in hydrogen alpha . It has sections on
hydrogen alpha filters and what can be seen using such filters (i.e.
prominences, filaments andflares). It is available from the Liverpool
Astronomical Society
publications web page.
Last
updated on
02 August 2003.
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