San Antonio College Library

The Sun is our star. Its energy enables life on the Earth to thrive yet we know so little about the solar weather and the 11 year solar cycle. Modern technology can be adversely affected by giant coronal mass ejections and there appears to be a link between sunspot activity and climatic conditions. This episode examines the work done by the Solar and Heliospheric Observatory (SOHO); the Solar Dynamics Observatory and the Parker Solar Probe.

"Prince Klemens Wenzel von Metternich (full name German: Klemens Wenzel Nepomuk Lothar, Fürst von Metternich-Winneburg zu Beilstein, anglicised as Clement Wenceslas Lothar von Metternich-Winneburg-Beilstein; 15 May 1773? 11 June 1859) was a German politician and statesman of Rhenish extraction and one of the most important diplomats of his era, serving as the Foreign Minister of the Holy Roman Empire and its successor state, the Austrian Empire,...

Traces the history of Puerto Rico from the first Spanish settlement established by Ponce de Leon to its present status as a "Free Associated State" of the United States.