Day: October 21, 2016
Supermassive black holes (SMBHs) represent an important aspect of galaxy evolution theory that remains at the frontier of modern research. Like their stellar-mass versions, SMBHs…
The stellar photosphere, the “surface of a star,” is defined as the layer of its atmosphere at an optical depth τλ = 2/3 for a…
Among the pioneers of the idea of swirling vortices of gas being responsible for the formation of the solar system was Descartes (1644). In his…
Geomorphological, mineralogical and other evidence of the conditions favoring the existence of water on Mars in liquid phase is reviewed. This includes signatures of past…
