A notebook of useful things

Day: 7 March 2014

Musica universalis (4) – Gravitation

Alexander Popov (2012), Attractive force



Isaac Newton, Philosophiæ naturalis principia mathematica

Albert Einstein, Die Grundlage der allgemeinen Relativitätstheorie

Musica universalis (3) – Fractal cosmology

Mat Zo (2009), Fractal Universe



Andrei D. Linde, Eternally existing self-reproducing chaotic inflationary universe, and references to it.

Musica universalis (1) – String Theory

Temple One (2009), String Theory



The early history of string theory and supersymmetry,  and references therein.

The first photograph of the Moon…

…and the birth of astrophotography.

The earliest known photograph of the Moon was taken by John William Draper in 1839 or 1840. Draper, an Englishman by birth, was a chemistry professor at New York University at the time. This silver platinum plate of the Moon was the first of a series he shot through his telescope.

First known photograph of the moon

From this: Probably the first photograph of the moon, 1839


In 2013, the Hubble Space Telescope took a picture of the farthest galaxy ever discovered,  the dwarf galaxy z8_GND_5296. Since far=old (that’s 13.1 billion years old), it also holds the record for the oldest object ever photographed using visible light.

To this: A photo of the farthest galaxy ever discovered, 2013.

To this: A photo of the farthest galaxy ever discovered, 2013.


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