The Hubble image of the Bubble Nebula (NGC 7635) is the official image celebrating the 26th anniversary of Hubble's launch into Earth orbit's. Since 1990 Hubble has been capturing awe-inspiring images of the Universe. Floating about 350 miles above the Earth, the Hubble Space Telescope (HST) is able to take high-resolution images free of the image-distortion that occurs due to atmospheric turbulence. Hubble performs a full orbit around the Earth approximately every 95 minutes, and since its launch has completed 1.2 million observations. Among its many accomplishments, HST helped scientists determine the rate of expansion of the Universe.
San Francisco, CA – On view at Crown Point Press is an exhibition of etchings by scientists and mathematicians, September 4 - October 27, 2015. We came across this set of beautiful etchings on Artsy depicting mathematical equations. We decided to reproduce them on Authorea, using our equation editor and some LaTeX. Here’s the result.
“It is known that Maxwell’s electrodynamics—as usually understood at the present time—when applied to moving bodies, leads to asymmetries which do not appear to be inherent in the phenomena. Take, for example, the reciprocal electrodynamic action of a magnet and a conductor. The observable phenomenon here depends only on the relative motion of the conductor and the magnet, whereas the customary view draws a sharp distinction between the two cases in which either the one or the other of these bodies is in motion. For if the magnet is in motion and the conductor at rest, there arises in the neighbourhood of the magnet an electric field with a certain definite energy, producing a current at the places where parts of the conductor are situated. But if the magnet is stationary and the conductor in motion, no electric field arises in the neighbourhood of the magnet. In the conductor, however, we find an electromotive force, to which in itself there is no corresponding energy, but which gives rise—assuming equality of relative motion in the two cases discussed—to electric currents of the same path and intensity as those produced by the electric forces in the former case.”
SPECIAL AND GENERAL PRINCIPLE OF RELATIVITY The basal principle, which was the pivot of all our previous considerations, was the special principle of relativity, i.e. the principle of the physical relativity of all uniform motion. Let us once more analyse its meaning carefully. It was at all times clear that, from the point of view of the idea it conveys to us, every motion must only be considered as a relative motion. Returning to the illustration we have frequently used of the embankment and the railway carriage, we can express the fact of the motion here taking place in the following two forms, both of which are equally justifiable .