Showing posts with label Red Flash. Show all posts
Showing posts with label Red Flash. Show all posts

Sunday, February 22, 2009

Sunrise Images and A Total Solar Eclipse


I am so sick and tired and tired of being sick and tired of winter, it's either frigging cold or it warms up only to snow. The weather here needless to say has not been cooperating with my celestial viewing habits, missed the Lunar/Pleiades conjunction earlier this month and this morning missed the Lunar, Mercury, Jupiter, Mars conjunction due to clouds, all was not lost though, the clouds which prevented me from seeing and imaging the planets allowed me to capture a beautiful Sunrise.


Atmospheric refraction stretched out the bottom of the Sun giving the it a cool oblonged shape.



Even got a Green Flash.




As well as a Red Flash


I'm hoping the weather will work with me March 2, the next major conjunction. Look to the West the evening of March 2 for another gathering of the Moon and Pleiades, they will be close together most of the night in North America but will be their closest together as the pair sets together around 2:30 am CST.

We had a penumbral eclipse February 9, oh and by the way I missed it as well due to clouds. A Penumbral eclipse is when the Moon passes through the Earth's penumbral shadow, what you see is a slight Earth shadow on the Lunar surface making part of the Moon look darker. The Japan Aerospace Exploration Agency released what the event looked like from the Moon. Using Kaguya's, High Definition camera, the orbiter captured a beautiful image of what we know all too well , the diamond ring effect that happens during a Total Solar Eclipse here on Earth, very pretty.

Kaguya is Japan's Lunar Orbiter who's mission it is to gather data such as the Moon's mineralogy and geographic data as well as magnetic and gravity field information so as to better understand the Moon's origin and evolution. Kaguya is expected to ends it's mission with a controlled fall to the Lunar surface sometime in June. I'll leave you now with a clip of the event.


Sunday, January 18, 2009

The Green Flash, the Red Flash



Man oh man, I just love viewing and taking pics of sky phenomenon that sound like superheroes.
"Honey.. I'm going out to try and capture the "Green Flash". See, there is something about saying that. I have made it my goal to try and capture these elusive/seldom seen phenomenon the last couple months, and finally did.

There is only about a couple months I have to do it, you have to have a true horizon and in my area the Sun only sets on a true flat horizon December and parts of January. If you don't have a true horizon the green flash happens behind a hill or the grade of the landscape. You see, when you are looking at the Sun on the horizon, you aren't, you are looking at the apparent Sun, the real Sun is actually below the horizon but due to atmosphere refraction the real Sun is bent up, much in the same way when you put a straw in a glass of water, the medium, water, bends or refracts the straw, you see two straws , the actual and the apparent straw.

Everything in the sky, the sky being the medium, is bent to a degree, about a half, or the diameter of the Sun, the apparent or fake Sun is actually sitting on top of the real Sun, which you don't see.


The illustration above shows what happens. Because the color green has a higher frequency, it has a steeper curve, more so then the reds, and is the last color to be refracted up to be seen by you.


I've also found that regular temps don't do it. I've been out in temps anywhere from -20c to -35c. At -20c the Sun looks a normal round, and no green flash, at -35c, you see a funky Sun, parts missing, square top and the like, this is because when the Sun travels along our lower atmosphere at -35c it's sunlight goes through more atmospheric temperature extremes making the separation of the reds and greens more apparent. Sorry for getting too technical but I thought there might be some of you that would appreciate the whys.


The Red Flash above is caused by atmospheric inversions causing all of the light being blocked, again the extreme temperatures, so you get the red all by itself, this time the red's longer wavelength helps, it is able to sneak through the lower atmosphere, filled with more particles, like dust, the greens and the blues are scattered because of their higher frequency, they tend to bump into all the lower atmospheric dust particles and get scattered out of the light path. What is interesting about this image is you can actually see a tiny bit of green on top of the Sun, so I have actually captured a green and red flash in the same image.




Again, sorry for getting so technical, it's not like there is going to be a test after, so if you want you can just take a look at what I think are cool pics and move along and not having to worry about a quiz or anything.

I got a cool perigee atmospheric Moon from Ivanhoe, this one I thought I would animate, looks cool, thanks Ivanhoe for allowing me to post it, and if you want , you get a free pair of Hanna Montana/Miley Cyrus 3D glasses.