On June 2002. big sunspots appeared at the southern solar
hemisphere. These were big ones, bigger than the earth in fact!
At the Catania Astrophysical
Observatory in Italy, there's a daily databank of pictures of the
sun in ftp archive. The link is ftp://ftp.ct.astro.it/sunimpho.
If we look
for the June 4th, 2002 photograph, we�ll find the jpg file named: oact_hared_fl_20020604_071914.jpg the numbers meaning
year-month-day-hour-minute-second (Universal Time).
The image of that day:
oact_hared_fl_20020604_071914.jpg is shown below:
Highlighted at the southern hemisphere we find the two main groups labeled A & B with several sunspots inside. Notice that the bigger ones have a diameter several times that of the earth!
So I took my 60 mm refractor, and projected the sun image
over a white surface (sheet of paper). Using my Olympus OM10 reflex camera
mounted on a tripod I obtained the following images of the sun projected image
(KODAK iso100 color prints): Sunspot Groups A & B. Enhanced view of the picture at left Enhanced view of the picture at left Detailed view of Group A,
Note that
circular image in this photo
is not the sun disk but the
eyepiece field!
enhanced image
to show
better contrast. (Paintshop 5)