Hubblecast 23 Special: Seeing the invisible
Channel: HubbleWebbESA
Date: 23/06/2010

In this new Hubblecast episode, Dr. J guides us through the fifth chapter of Eyes on the Skies, the International Astronomical Union's movie celebrating the telescope on its 400th anniversary in 2009.

The Universe is a black void, with a scattering of stars, nebulae and galaxies – or so it appears to observers using visible light. But if we include other forms of radiation invisible to us, the picture changes completely: clouds of interstellar hydrogen gas, emitting radio waves; stellar nurseries, glowing in the infrared; explosive outbursts of gamma rays and the all-sky background hiss of the Big Bang, diluted by almost fourteen billion years of cosmic expansion. So how do astronomers learn about the unseen Universe? By building telescopes and detectors that can see the invisible. Watch this Hubblecast episode and find out more.

Subscribe to Hubblecast!

More information and download options: http://www.spacetelescope.org/videos/hubblecast23a/

Subscribe to Hubblecast in iTunes! https://itunes.apple.com/gb/podcast/hubblecast-hd/id258935617

Receive future episodes on YouTube by pressing the Subscribe button above or follow us on Vimeo: https://vimeo.com/hubbleesa

Watch more Hubblecavideo.web_category.allst episodes: http://www.spacetelescope.org/videos/archive/category/hubblecast/

Credit:
ESA/Hubble (M. Kornmesser & L. L. Christensen)  
Visual design & Editing: Martin Kornmesser  
Animations: Martin Kornmesser & Luis Calçada  
Web Technical Support: Lars Holm Nielsen & Raquel Yumi Shida  
Written by: Govert Schilling & Lars Lindberg Christensen  
Presented by: Dr Joe Liske (Dr J)  
Narration: Howard Cooper & Bob Fosbury  
Cinematography: Peter Rixner  
Music: movetwo  
Footage and photos: for a complete list of credits, please check this link  
Directed by: Lars Lindberg Christensen