The Essential Guide to Astronomy
Physicist, retired from Centro de Investigaciones de Astronomia CIDA, Merida, Venezuela. Now engaged in OAPJS (Observatorio Astronomico Personal "Jurgen Stock").
Nebula & Galaxy
By: dellap December 29, 2016
By: dellap October 27, 2015
Lunar Eclipses
By: dellap September 28, 2015
By: dellap September 11, 2015
Stars & Star Clusters
By: dellap May 19, 2015
Skyscapes & Constellations
By: dellap December 11, 2014