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.

Saturday, August 31, 2024

Dark Matter

"Dark matter isn’t simply dark: it’s invisible. Light of all types seems to pass through as though it’s completely transparent. However, dark matter does have mass, which we see by its gravitational influence."https://www.cfa.harvard.edu/research/topic/dark-energy-and-dark-matter

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