 |
The
Sun
A class GII Star
on an outer limb of the Milky Way Galaxy |
|
| Observed
November 17, 2001 |
|
 |
Orion
ST80
80/500 Chinese Refractor
28mm William Optics Digital Camera Eyepiece
2001:11:17 16:29:42 |
 |
Orion
ST80
80/500 Chinese Refractor
28mm William Optics Digital Camera Eyepiece
2001:11:17 16:27:06 |
  |
Here are
sunspot regions 9704 and 9697 (right).
Meade LX90
203mm SCT
Meade 8.8mm UWA eyepiece
9704 was stacked
using 34 low resolution images.
|
| Observed
October 6, 2001 - A new Sunspot, region 9653, was numbered today, however
it is located in a region which has been numbered before. |
Sunspot
regions numbered left to right. |
 |
Regions
9645
9641
|
 |
Regions
9653
9650
9649
9648 |
|
What is a sunspot?
A sunspot
is an area in the Sun's photosphere that contains a concentrated magnetic
field which makes it considerably cooler than the rest of the visual surface
of the Sun. The dark spots in the photographs above are sun spots.
Most sunspots are larger than the Earth and their magnetic fields
are also larger than Earth's magnetic field. These magnetic fields
choke the heat and energy in the sunspot area causing these areas to cool
to 3230°C (5850°F), whereas the normal surface or photosphere
has a temperature of 5510°C (9950°F). Most of the light
that reaches the Earth emanates from the photosphere which is the lowest,
densest atmosphere of the Sun. The magnetic field is strongest in
the darker parts of the sunspots called the umbra. The field is weaker
and more horizontal in the lighter part called the penumbra.
What are Faculae?
The white
areas in the photograph are faculae and they are bright, hot areas also
of a magnetic nature but the field is concentrated in much smaller bundles
than in sunspots. While sunspots make the sun look darker the faculae
make it look lighter.
|
These
photographs were taken using a Nikon Coolpix 995 digital camera with
a William Optics digital camera eyepiece in a Meade LX90 203mm
SC Telescope with a Baader film solar filter. |