King Louis XIV of France covered his telescope’s objective lens with a piece of smoked glass to view the solar eclipse. This method remained popular for a couple hundred years until the 1930s when products such as the Eclipse-o-scope became available
After Years of Searching, Physicists Observe Electrons Flow Into Fluid-Like Whirlpools
Astronomers rewind the clock on Eta Carinae’s “Great Eruption” of 1837, showing in a new paper that the X-ray power alone released by the explosion was about 10 million times greater than the entire radiant power of the Sun across all wavelengths.
