In case you didn’t notice, the predicted end of the world on 19 Nov 2017 did not happen. I don’t expect it to happen any time soon. I don’t normally make bold predictions about anything. There was one exception in 1974 in the Nixon administration. I successfully predicted he would resign. I think I was lucky.
If you are a believer in the end times prophesies, you may scoff at my prediction. That’s ok. I will give 10 reasons why I think I’m right. Mine are based on science. Join me below the glowing solar firestorm of death and destruction for the reasons we can feel the end is NOT near.
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The sun’s output in the visible spectrum peaks around yellow. Our eyes are most sensitive to that part of the visible spectrum. The sun also radiates in a broad range of other wavelengths invisible to our eyes. Each comes from dynamics taking place on the surface and in the atmosphere of the sun.
I’ve written about NASA’s Solar Dynamics Observatory (SDO) earlier in a previous post. SDO observes and images the sun several times a minute at ten different wavelengths to give a more complete picture of the activity at and near the surface. A description of those wavelengths is available here. I used the images from the SDO site to render this image of the sun at those ten wavelengths. The yellow center represents the sun’s surface. Each ring of color is at a higher altitude and temperature in the atmosphere of the sun.
Original images used from: NASA/GSFC/Solar Dynamics Observatory
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The first time I viewed a total solar eclipse was in 1999. We traveled to London, took the trains to Edinburgh, Glasgow, then Oban. Rode the ferry to the island of Barra for a few days. We came back to London and then to Dover for a couple of days. We boarded the high speed train to Paris. It went through the Chunnel and emerged in France going 185 mph. Another train from Paris got us to Stuttgart Germany in time for the total eclipse.
You need to have proper eye protection leading up to and following the total eclipse on August 21 in the United States. During the minute or two of totality, it is ok to view without eye protection. But, not before or after. Inexpensive viewers are available from many sources. Talk to a person from your local astronomy club. They will be happy to help.
A few days ago I received an email notice from CalSky that the International Space Station would pass directly in front of the Sun for my location. The station moves about 5 mi/sec. The duration of the transit would be 0.67 sec to cross the full disc of the Sun. Here it is. Don’t blink.
This view is slowed down to 1/4 as fast and is much easier to see. Do you hear the birds in the background?
Here is a composite of the station position each tenth of a second.
Venus is closer to the Sun and orbits faster than Earth. Earth takes just over 365 days. Venus orbits in just under 225 Earth days. During the recent few months, Venus was bright and easily visible in the evening sky as it caught up to and passed Earth. In doing so, it came closer and appeared larger when viewed with a telescope or binoculars. This animation from a desktop program illustrates their motions. Mercury is not shown in order to simplify the view. The sizes are exaggerated.
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A prism of high quality glass sits in a south window above our mantle. It is part of a surplus optical instrument from WW-II. The window crank gives a sense of its 2″x1″x1″ size.
When the Sun is low in the sky during late fall and winter, light through the prism casts a large full spectrum on the wall on the opposite side of the house. This is a closeup of the spectrum. It is always a delight to see the colors move slowly across the wall during the middle part of a sunny day.
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Viewed from Earth, the crescent of Venus narrows each day as it orbits the Sun. On 25 March 2017, it will be aligned almost directly between Earth and the Sun. In the weeks following, Venus will appear as a morning object and a thin crescent. Go here to see a 3D tool showing the orbital positions of the inner planets today. Notice the Date and Date Slider controls where you can change the date and see the planets move.
Venus 15 February 2017
Date Time Digitized: Feb 15, 2017, 6:05:33 PM CST
Exposure Time: 1/500 s
Photographic Sensitivity (ISO): 100