September 01, 2016 Thursday
Today we met our IO.
Discussed strategy for the upcoming bail hearing on 3rd Saturday.
Also discussed the role of:
Shivpoojan who is the Evil's driver
Ashok who is the Evil's electrician (and who is on the run since the day of botched up murder attempt)
Bedtime Story
There was a time not long ago when we thought that the entire universe comprised of our solar system.
Thereafter, as telescopes got sophisticated, and our milky way came to be known relatively better, even as late as early 1900s our galaxy was thought to be the entire universe.
As a matter of fact, a great debate took place on April 26, 1920 in the Baird auditorium of the Smithsonian Museum of Natural History, Washington DC, United States.
The debate took place between the two great astronomers of that time Harlow Shapley and Heber Curtis (hence also known as the Shapley-Curtis Debate).
The point in contention was whether the faint nebulae seen in the sky were part of the Milky Way galaxy or they were independent galaxies themselves.
The only way to answer that was measuring their distances.
Parallax method was useless here as was discussed last time.
It was here that the period-luminosity relationship or the Leavitt's Law came to aid in figuring out cosmic distances.
A Danish astronomer by the name of Ejnar Hertzsprung managed to locate some Cepheid Variables in local clusters (within our Milky Way) using spectroscopic parallax.
Finally the astronomers had a plotted chart of Cepheid Variables with known distances and known luminosities (as calculated from their periods).
With this data, if astronomers could locate any Cepheid in any galaxy, from its apparent luminosity (lot of it is lost in the intergalactic dust and clouds) and period, its true or absolute luminosity could be fairly accurately estimated.
Thus we land up with a standard candle; we have an object very far away with its apparent m and absolute luminosity M.
Using the equation:
5.log10D = m - M - 10
We get the distance D.
You see mon ami, without mathematics and physics, we would be truly lost in this universe or for that matter, even on this planet.
Stay tuned to the voice of an average storytelling chimpanzee or login at http://panarrans.blogspot.in/
Good night mon ami and my fellow cousin ape.
Today we met our IO.
Discussed strategy for the upcoming bail hearing on 3rd Saturday.
Also discussed the role of:
Shivpoojan who is the Evil's driver
Ashok who is the Evil's electrician (and who is on the run since the day of botched up murder attempt)
Bedtime Story
There was a time not long ago when we thought that the entire universe comprised of our solar system.
Thereafter, as telescopes got sophisticated, and our milky way came to be known relatively better, even as late as early 1900s our galaxy was thought to be the entire universe.
As a matter of fact, a great debate took place on April 26, 1920 in the Baird auditorium of the Smithsonian Museum of Natural History, Washington DC, United States.
The debate took place between the two great astronomers of that time Harlow Shapley and Heber Curtis (hence also known as the Shapley-Curtis Debate).
The point in contention was whether the faint nebulae seen in the sky were part of the Milky Way galaxy or they were independent galaxies themselves.
The only way to answer that was measuring their distances.
Parallax method was useless here as was discussed last time.
It was here that the period-luminosity relationship or the Leavitt's Law came to aid in figuring out cosmic distances.
A Danish astronomer by the name of Ejnar Hertzsprung managed to locate some Cepheid Variables in local clusters (within our Milky Way) using spectroscopic parallax.
Finally the astronomers had a plotted chart of Cepheid Variables with known distances and known luminosities (as calculated from their periods).
With this data, if astronomers could locate any Cepheid in any galaxy, from its apparent luminosity (lot of it is lost in the intergalactic dust and clouds) and period, its true or absolute luminosity could be fairly accurately estimated.
Thus we land up with a standard candle; we have an object very far away with its apparent m and absolute luminosity M.
Using the equation:
5.log10D = m - M - 10
We get the distance D.
You see mon ami, without mathematics and physics, we would be truly lost in this universe or for that matter, even on this planet.
Stay tuned to the voice of an average storytelling chimpanzee or login at http://panarrans.blogspot.in/
Good night mon ami and my fellow cousin ape.
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