Cosmic Collisions Galore

Alpha Centauri about 25 trillion miles (40 trillion km) distant. Hence the distance to Alpha Centauri is about 28 million times larger than the diameter of the Sun. I say "millions" in the podcast just to make it easy to remember. Since a baseball is about 3 inches (7.6 cm) in diameter, a scale model of our Sun and Alpha Centauri would be two baseballs separated by 28 million times 3 inches (7.6 cm). Do the math, and you get about 1300 miles (2092 km). The distance between Baltimore (where ...
Author: ScienceMagazine; Tags: cosmic collisions interacting galaxies galore hubble space telescopes universe nasa esa eso cast gravity mergers astronomy stars colliding anniversary images shuttle discovery suns alpha centauri speed of light science astronomers


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