- Johannes Kepler (December 27 1571 – November 15 1630) was a German Lutheran mathematician, astronomer and astrologer, and a key figure in the 17th century astronomical revolution. He is best known for his laws of planetary motion, which provided one of the foundations of Isaac Newton’s law of universal gravitation.
- The Deep Sky Collective presents: M31 - the kilohour project and the quest for Oiii (app.astrobin.com)
After half a year of work, the Deep Sky Collective is happy to present its latest project - a kilo hour on M31. Not only does this image set new boundaries of what’s possible with collaborative imaging, its release also marks the DSC’s anniversary project! Being launched the 13rd February last year, we never thought we could achieve what we did so far - huge thanks to everyone involved in the DSC and for keeping on believing in what we do.
Geometry has two great treasures: one is the Theorem of Phythagoras, the other the division of a line in extreme and mean ratio. The first we can compare to a mass of gold; the other we may call a precious jewel.
Johannes KeplerI much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses.
Johannes KeplerI used to measure the heavens, now I measure the shadows of Earth. Although my mind was heaven-bound, the shadow of my body lies here.
Johannes Kepler