Wednesday, May 11, 2016

Global warming impact of Mercury Transit

During the Mercury Transit on May 9th of 2016 we had a discussion about an impact on Earth of that event: Would it be colder or warmer. Will do it in several steps:

Step #1. Sun to Mercury proportions.

For the measurements I've used my own picture of Mercury Transit:


The size of the sun is about 1950 pixels. The size of the mercury is about 12 pixels.

Use formula: (1950x1950)/(12/12) = 3837681 / 144 = 26650.56
That is how many times Sun's disk is bigger than Mercury's disk.

Step #2. Calculate total Sun energy.

Fact A: Accordingly to Wikipedia the Sun produces 1,368 W/m2 of energy at the distance of the Earth.
Fact B: Earth Diameter is 12742 Km
Fact C: By basic calculations (A =  π x D/4 ): 3.14159 x 12742 x 12742 / 4 = 127.516118 x 1012 m2 - it is Total Earth disk accepting the solar energy.
Fact D: Total Energy getting by the Earth's disk is following: 1,368 x 127.516118 x 1012 = 174,442.05 x 1012 W.

Step #3. Calculate blocked energy.

Simply divide #2 by #1:
174,442.05 x 1012 / 26650.56 = 6.545529739 x 1012 W

Step #4. Calculate Total blocked energy.


Mercury transit last exactly 7.5 hours and it is easy to calculate it's impact:
6.545529739 x 1012 x 7.5 = 49.091473 x 1012 Wh = 49.09 TWh

Step #5. Calculate Power Plant Energy produced annually.

To compare I want to take one of the largest in the World coil powered station "Bełchatów Power Station" in Poland:
It peaked to up to 5.42 GW in September of 2015.

Simple calculation of hours within a year: 365 x 24 + 6 = 8,766 hours
That means, if that power plant will work whole year on its peak it would produce following amount of energy:
8,766 x 5.42 = 47,511.22 MWh = 47.5 TWh

Conclusion:

Mercury transit of 2016 blocked about the same amount of solar energy as it is produced by largest coil plant in the world during a year.

That really demonstrates for me how insignificant any human made impact on global worming is, comparable to impact of the Sun and any celestial events.

Monday, May 9, 2016

Transit of Mercury

The original intention was to make a time lapse video of the event, but obviously, because we can't control the weather for even one single day, event was just above the lowest expectations.

Will say up front: we've seen it.

We set even two telescopes with solar filters. However, as you can see, day was extremely cloudy and partially rainy.




Sometimes, cloud's became thinier and we could see a little dot on the surface of the Sun for just couple of seconds. That was just enough to make a picture through the eyepiece by little old tiny crappy camera.


Clouds uncover the Sun and then cover it back again so quickly and unpredictable that there was no any slide possibility to mount bigger camera, set it up and focus to make a batter picture.

That is probably the best picture I've had:


And here is just a little video to show what was really going on and how difficult it was to fight the cloud.