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The Milky Way

Episode 17 of 30

Astronomer Heather Couper considers the struggle to develop knowledge about the Milky Way galaxy and our place within it. From June 2008.

Heather Couper presents a narrative history of astronomy.

Galileo realised that the Milky Way was a glowing band of stars across the sky and philosopher Immanuel Kant recognised that our Sun was just one member of a vast star system. But for centuries, few recognised the true nature of our galaxy. In the late 19th century, William Herschel realised that the Milky Way was a giant body of stars, but still his discovery was ignored. It was not until early in the 20th century that Harlow Shapley began to estimate the distances of the stars and hence map out the Milky Way in three-dimensional detail. Radio astronomy finally yielded the ability to penetrate the dark clouds towards the galactic centre and see the true distribution of matter in the skies.

15 minutes

Last on

Wed 22 Nov 2017 02:15

Broadcasts

  • Tue 17 Jun 2008 15:45
  • Thu 23 May 2013 14:15
  • Tue 17 Feb 2015 14:15
  • Wed 18 Feb 2015 00:15
  • Tue 21 Nov 2017 14:15
  • Wed 22 Nov 2017 02:15