Dear dialists
Sharpen your shadow-sharpeners and try to see
with them the huge sunspot that there is these
days. If you have a telescope the view is superb...
but PLEASE do not use an old radiography or film
or things like these!
Regards,
Anselmo
-
or look at:
http://umbra.nascom.nasa.gov/images/
no filter necessary.
Thibaud Chabot
At 12:22 15-09-2005, anselmo wrote:
Dear dialists
Sharpen your shadow-sharpeners and try to see
with them the huge sunspot that there is these
days. If you have a telescope the view is superb...
but PLEASE do
John Davis wrote:
The info you want is in the BSS Glossary (plug, plug!) under
semidiameter.
The answers are 15.76 arcmins in July (aphelion) and 16.29 arcmins in
January (perihelion). For the purposes of looking at sunspots, I'd say
this
was insignificant. If the differences were much larger
Hello all:
I just looked at the SOHO solar satellite photos of the sunspots and noticed
that the spots were different from the ones I saw on Christmas morning.
Could it be that SOHO was on the opposite side of the sun when the picture
was taken? Or maybe the sun's rotation since Christmass
satellite photos of the sunspots and noticed
that the spots were different from the ones I saw on Christmas morning.
Could it be that SOHO was on the opposite side of the sun when the picture
was taken? Or maybe the sun's rotation since Christmass brought the sun's
farside into view.
If an earthboud
According to a NASA Web site:
The MDI (Michelson Doppler Imager) images shown here are taken in the
continuum near the NiI 6768 Angstroms line. The most prominent solar
features are the sunspots on the solar photosphere. This is very much
how the Sun looks like in the visible range
:
According to a NASA Web site:
The MDI (Michelson Doppler Imager) images shown here are taken in the
continuum near the NiI 6768 Angstroms line. The most prominent solar
features are the sunspots on the solar photosphere. This is very much
how the Sun looks like in the visible range of the spectrum
Dave Bell wrote:
WOW! Those are some great images...
What are the LASCO instruments? Obviously the large central disk is an
occulting disk, allowing the corona to be photographed; I assume the
smaller central circle is the true diameter of the Sun. The LASCO C3 image
contains a lot of
On Wed, 3 Jan 2001, R.H. van Gent wrote:
The LASCO (Large Angle Spectrometric Coronagraph) instrument is designed
to observe the solar corona (the very faint outer atmosphere of the
Sun).
The bright object left of the Sun in the LASCO C3 image is Mercury and
the horizontal line appears to
at the other
end from unwanted sunlight.
Even more amazing than the eclipse were the large number of sunspots. I've
never seen so many. We counted 24 of them! This is because the sun is at
the peak of its 11 year solar cycle. I checked, and found out that the sun
will be at perihelion on January 4
in
January (perihelion). For the purposes of looking at sunspots, I'd say this
was insignificant. If the differences were much larger, it would have a
noticeble affect on the seasonal temperatures!
Best regards,
John
Dr J R
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