What Earth and our Solar System’s Planets are made of

I like the simple representation, emphasizing the differentiation between our planets. All following illustrations by Vadim Sadovski – Space art.


Earth inner structure. Elements of this image furnished by NASA


Mars inner structure. Elements of this image furnished by NASA

Jupiter inner structure. Elements of this image furnished by NASA

Saturn inner structure. Elements of this image furnished by NASA

Uranus inner structure. Elements of this image furnished by NASA

Neptune inner structure. Elements of this image furnished by NASA

Venus inner structure. Elements of this image furnished by NASA


Beautiful Polish Stamps from 1963 show Satellites and Spaceships

Ah, these beautiful Polish stamps remind me of my childhood some 20 years later in Poland when we looked up to the stars, space ships, astronauts and cosmonauts, … and Star Wars – The Movie.

Via > We are Star Stuff

Scientific Engravings from 1850

Engravings on science by John Philipps Emslie. 
The pictures illustrate the equipment and phenomena of several physical disciplines.

Via the Wellcome Collection.

The Great Art of Light and Shadow

Illustration by Athanasius Kircher from his book Ars Magna Lucis et Umbrae (The Great Art of Light and Shadow).

"In 1646, Kircher published Ars Magna Lucis et Umbrae, on the subject of the display of images on a screen using an apparatus similar to the magic lantern as developed byChristiaan Huygens and others. Kircher described the construction of a "catotrophic lamp" that used reflection to project images on the wall of a darkened room. Although Kircher did not invent the device, he made improvements over previous models, and suggested methods by which exhibitors could use his device. Much of the significance of his work arises from Kircher's rational approach towards the demystification of projected images.

For most of his professional life, Kircher was one of the scientific stars of his world: according to historian Paula Findlen, he was "the first scholar with a global reputation". His importance was twofold: to the results of his own experiments and research he added information gleaned from his correspondence with over 760 scientists, physicians and above all his fellow Jesuits in all parts of the globe. The Encyclopædia Britannica calls him a "one-man intellectual clearing house". His works, illustrated to his orders, were extremely popular, and he was the first scientist to be able to support himself through the sale of his books. Towards the end of his life his stock fell, as the rationalist Cartesian approach began to dominate (Descartes himself described Kircher as "more quacksalver than savant")."

Via wikipedia.org


Euler: Genius Blind Astronomer Mathematician

"Leonhard Euler, the most prolific mathematician in history, contributed to advance a wide spectrum of topics in celestial mechanics. At the St. Petersburg Observatory, Euler observed sunspots and tracked the movements of the Moon. Combining astronomical observations with his own mathematical genius, he determined the orbits of planets and comets. Euler laid the foundations of the methods of planetary perturbations and solved many of the Newtonian mechanics problems of the eighteenth century that are relevant today. In his study of the three-body problem, Euler discovered two of five equilibrium points so-called the Lagrangian points. His pioneering work in astronomy was recognized with six of the twelve prizes he won from the Paris Academy of Sciences. In this article, we review some of Euler’s most interesting work in astronomy."

by Dora E. Musielak, University of Texas at Arlington

I warmly recommend to check out her interesting article about Euler here.

Map of Scientific Collaboration Between Researchers

Looks like a meteor shower!
Here is some background information:

"Using data from Science-Metrix, a bibliometric consulting firm that licenses data from journal aggregators like Elsevier's Scopus and Thomson Reuter's Web of Science, Olivier Beauchesne build an intricate map of scientific collaborations between cities all over the world, between 2005 and 2009.

As Olivier explains: "…if a UCLA researcher published a paper with a colleague at the University of Tokyo, this would create an instance of collaboration between Los Angeles and Tokyo. The result of this process is a very long list of city pairs, like Los Angeles-Tokyo, and the number of instances of scientific collaboration between them."

The brightness of the lines is a function of the logarithm of the number of collaborations betweena pair of cities and the logarithm of the distance between those same two cities."


Astronomy Charts

"Ornate and complex astronomy charts from Tibet."