Posts Tagged ‘Sun

29
Apr
10

Longest exposure photograph

The adjacent picture is one of the longest exposure photographs. And the exposure was for 15,552,000 seconds or 6months!!

Photographer Justin Quinnell strapped the camera to a telephone pole overlooking the Gorge, where it was left between December 19, 2007 and June 21, 2008–the Winter and Summer solstices. This dream-like picture shows each phase of the sun over Bristol’s Clifton Suspension Bridge taken during half a year.

The image was captured on a pin-hole camera made from an empty drinks can with a 0.25mm aperture and a single sheet of photographic paper.

Solargraph’ shows six months of the sun’s luminescent trails and its subtle change of course caused by the earth’s movement in orbit. The lowest arc being the first day of exposure on the Winter solstice, while the top curves were captured mid-Summer.

(Dotted lines of light are the result of overcast days when the sun struggled to penetrate the cloud.)

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25
Apr
10

The Sun

Found this beautiful pic of the Sun on the web. This one’s recently captured by SDO (Solar Dynamics Laboratory).

SDO: The Solar Dynamics Observatory is the first mission to be launched for NASA’s Living With a Star (LWS) Program, a program designed to understand the causes of solar variability and its impacts on Earth. SDO is designed to help us understand the Sun’s influence on Earth and Near-Earth space by studying the solar atmosphere on small scales of space and time and in many wavelengths simultaneously.

SDO’s goal is to understand, driving towards a predictive capability, the solar variations that influence life on Earth and humanity’s technological systems by determining

  • how the Sun’s magnetic field is generated and structured
  • how this stored magnetic energy is converted and released into the heliosphere and geospace in the form of solar wind, energetic particles, and variations in the solar irradiance.

Some more interesting pics and videos here

10
Feb
10

Eclipse Myths

There was this amazing solar eclipse about a month back in January 2010. And people suggested I don’t eat food during that time. Some say, that one shouldn’t go out. Am not really sure how true these are. Could get this article online, which looked genuine to me. I simply paste the article without tampering

A solar or a lunar eclipse is a scientific phenomenon. It is quite like you walking in front of a light source and blocking a part of it from reaching the other side. During a solar eclipse the moon comes between the earth and the sun and blocks the part of the sun’s rays from reaching the earth. During a lunar eclipse the earth comes between the moon and the sun. The earth also casts its shadow on the moon. This shadow is very similar to a shadow of a tree on the ground or a shadow of a tall building that falls on your home or garden.

However in many cultures around the world, superstitions and myths surround eclipses as they are considered a bad omen or divine discontent.

My mother has forbidden me from stepping out during the eclipse. Is it safe to step out?

In the olden days, people were probably restricted from going out during an eclipse to avoid directly looking at the sun and causing damage to their eyes. This tradition has persisted till date.

There is no evidence at all of eclipses causing fetal deformities or harming your baby in any way. Eclipses can be seen from many parts of the world and in many countries there is no tradition of avoiding going out during an eclipse. Here, there is a widespread belief that pregnant women should not go out during an eclipse, which means that often parents and elders may be very worried about your safety. Many women choose not to go out in order to avoid causing distress to their families. It is a matter of personal choice if you want to stay indoors or go out. However, if you are out, take proper precautions to protect your eyes if you plan to watch the eclipse.

Why should I not look at the sun directly during an eclipse?

Normally the sun is so bright that you cannot look directly at the sun. However, during an eclipse, you can look at the sun without much discomfort to the eyes at the time. This can damage your eyes without you even realizing it. That is why, you are advised to watch an eclipse with proper eye protection.

Is it important to throw away all cooked food and take a bath after an eclipse?

Sometimes traditions and beliefs outlive their times with no scientific explanation. Throwing away all cooked food is wastage of food. Similarly taking a bath after an eclipse is also a belief and is being followed more as a superstition.

04
Jun
09

Why does Sun rise from the east?

Think one thing that is taken for granted is that Sun rises in the east. In Vaastu this plays a significant role in deciding how the house must be structured.

But why? Must have read in 5th standard but then I-am-not-smarter-than-a-fifth-grader u c. I know it must be connected to moving of earth and some direction in which it is moving and all… But lemme figure out why exactly this happens.

According to this article

Have you ever noticed that as the seasons change, the sun seems to move a little on the horizon? Maybe not. But the Earth is tilted on its axis about 23½ degrees and the orbit of the Earth around the sun is elliptical. These factors effect the apparent position of the sun in the sky. On the Equinox in March and September the sun does rise in the east. At all other times it is slightly north or south of east. At the Summer Solstice and the Winter Solstice in June and December, the sun is significantly shifted from due east. How far? Paste the address below into your browser or click the related link below to see.

So Sun does not really rise from the east always, but then what governs this whole phenomenon. Interestingly, not only Sun, but moon, planets and most of the stars also appear to rise from the east and set in the west.

According to NASA

Earth rotates or spins toward the east, and that’s why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky. Suppose you are facing east – the planet carries you eastward as it turns, so whatever lies beyond that eastern horizon eventually comes up over the horizon and you see it!

Fair enough.




So what’s this blog about?

Another attempt? Well yes. Attempting to figure out another sustainable model (there are some other attempts going on parallel-ly). Well, we have a lot of questions in mind. we read up stuff, we do some research to find answers to these questions. This is an attempt to publish that little 15-20 minute research.
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