The NASA Solar Dynamics Observatory (SDO) constantly peeks the solar atmosphere through the many filters overcoming a great number of challenges.
Enjoy this visualization module below for a great view of what we normally don’t see from earth with our powerful telescopes.
The wavelengths presented in the film are:
- 617.3nm optical light from SDO/HMI.
- From SDO/AIA we have 170nm (pink)
- Then 160nm (green), 33.5nm (blue)
- 30.4nm (orange)
- 21.1nm (violet)
- 19.3nm (bronze
- 17.1nm (gold)
- 13.1nm (aqua)
- And 9.4nm (green)
Amazing, isn’t it?
As the sun rotates wedge-shaped wavelength filter passes over a different region of the Sun. Observe what you see as it hovers over the sunspots! We can see a dramatic differences in solar structures as the lenses transfer the image from one wavelength to the next.
- Filaments extends off the limb in bright 30.4 nanometers, which cannot see w/ telescopes and can hardly see in other wavelengths.
- Sunspots which appear dark to telescopes on earth, appear glowing in ultraviolet wavelengths, showing solar magnetic field lines loops.
- Small flares, invisible in optical wavelengths, are brightly seen in ultraviolet wavelengths.
Solar Watcher explains that “If we compare the visible light limb of the Sun with the 170 nanometer filter on the left, with the visible light limb and the 9.4 nanometer filter on the right, we see that the ‘edge’ is at different heights. This effect is due to the different amounts of absorption, and emission, of the solar atmosphere in ultraviolet light.”
And “In far ultraviolet light, the photosphere is dark since the black-body spectrum at a temperature of 5700 Kelvin emits very little light in this wavelength.”
The film below shows the sun disk and beginning with wavelength 170nm (pink) and ending with 9.4nm (green) as described in the listing above.
According to Solar Watcher, “We let the set of filters sweep around the solar disk and then zoom and rotate the camera to rotate with the filters as the solar image is rotate underneath.”
I don’t know about you, but I am fascinated by the sun and its mysteries. I am always thrilled to share new news with you here.
- Watch the film below and have a very Merry Christmas and an extra joyous New Year.