Cecilia Payne and the Composition of the Stars Cecilia Payne (1900–1979) Payne began a long project to measure the absorption lines in stellar spectra She showed that the wide variation in stellar spectra is due mainly to the different ionization states of the atoms and hence different surface temperatures of the stars, not the different […]
PBS Documentary, Mozart’s life Wolfgang Amadeus Mozart and his father, Leopold Mozart, both played and composed music. As well as his older sister, Maria Anna Mozart. Mozart lived in the Classical Period. He was born in 1756 and died 1791. His full name was Johannes Chrysostomus Wolfgangus Theophilus Mozart. Mozart had six children, only two […]
https://youtu.be/85-p9EIEVUA What causes, or what’s happening at sun spots? (Find an image to include, or a short video, copy in the url.) Geomagnetic energy was so abundant that telegraph operators were able to send messages without being plugged into their batteries. What year was this event recorded, and what did they call it? What is […]
Using “A History of Eastern Europe” as a beginning exploration
Began Great Course, cursory exploration of Russia Before Russia existed, as far as we know, there were people known as the Eastern Slavs (9th century) in the territory of what is now Central Russia. They had a trade network between Scandinavia and the Byzantine. Vikings became interested and trade became challenging. They had a need […]