Showing posts with label space. Show all posts
Showing posts with label space. Show all posts

Sunday, June 10, 2012

Transit of Venus

Transit of Venus - June 5, 2012
It was a very cloudy afternoon.  I went outside at work just as the transit of Venus started but there was almost total cloud cover.  A few minutes into it the clouds cleared and I got to see Venus against the Sun for about 5 seconds.  I thought that might be all I would see because heavy dark clouds were rolling in.  On the way home the clouds broke up for a little but traffic was terrible.  I had my camera and binoculars in the car.  As soon as I got home I set up my camera and got this photo as more clouds were rolling in.  Five minutes after I got home there was total cloud cover. Later I noticed clear skies to the southwest so I drove that direction until it was clear enough to see the Sun.  I watched the sunset through binoculars and took more pictures.  It seemed to give a little depth of field to the solar system.  In fact the transit of Venus was used to calculate the distance from Earth to the Sun and from there calculate the distances of the other planets.  Observing the transit of Venus in 1769 was one of the main goals of Captain James Cook's first expedition.  Although moving clouds and Venus against the Sun seemed to create a depth of field it is still difficult to imagine the distances and sizes of the Sun and the solar system.  Venus is just a bit smaller than Earth but it is much closer to Earth than the Sun (Venus is about 30% of the distance to the Sun).  I understand how the distance to the Sun can be calculated from observations of the transit of Venus from different locations on the Earth but I am amazed by the instruments they had 250 years ago to take the measurements.  The world today is so automated it's difficult to imagine and appreciate how clocks, telescopes, sextants were designed and made.  Not to mention all the precise measurements of the orbits of the planets and the calculations (without calculators or computers) that led to the predictions of when the transits would occur.  

Sunday, May 27, 2012

Annular Eclipse - May 20, 2012

Annular Eclipse May 20, 2012 taken at Old Iron Town Junction, Utah
There are much better pictures of the eclipse all over the internet but these are mine.  I didn't really have the right equipment for photographing the sun/eclipses or at least not very good equipment. However, I did have a great location.  I had been planning this for months and was lucky the weather cooperated.  I went with a bunch of family and we had a great time.  We went west of Cedar City, Utah to Old Iron Town Junction.  Using a great app on my phone I found a clearing in the junipers with some nice rocks for sitting on and it was right on the center line of the eclipse path.  The app helped me find the center line not the clearing.  We all had eclipse glasses and I had two binoculars with solar filters.  My brother and I had our cameras with makeshift filters.  It was something I'll never forget and hope I have a chance to see another annular eclipse (hope to see a total solar eclipse soon too).