What makes constellations?

Constellations are named after a Greek or Roman God. They were made to help sailors find their way. Now they are used to help more people find their way. In this world such help is very useful.

Monday, August 24, 2026

Pierre Jules César Janssen



"On Aug. 18, 1868, a French astronomer named Pierre Jules César Janssen discovered helium while observing a total solar eclipse in India."


https://www.space.com/astronomy/on-this-day-in-space-aug-18-1868-total-solar-eclipse-leads-to-discovery-of-helium

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