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NOVA: Death Star

3.7 out of 5 stars 6 customer reviews

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(Sep 12, 2006)
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Special Features

None.

Product Details

  • Actors: Stacy Keach
  • Directors: David McNab
  • Format: Closed-captioned, Color, NTSC
  • Language: English
  • Region: Region 1 (U.S. and Canada only. Read more about DVD formats.)
  • Number of discs: 1
  • Rated:
    NR
    Not Rated
  • Studio: WGBH Boston
  • DVD Release Date: September 12, 2006
  • Run Time: 56 minutes
  • Average Customer Review: 3.7 out of 5 stars  See all reviews (6 customer reviews)
  • ASIN: B000GIXLL6
  • Amazon Best Sellers Rank: #215,879 in Movies & TV (See Top 100 in Movies & TV)

Customer Reviews

Top Customer Reviews

By Karl C. Nelson on October 25, 2006
While I missed the original NOVA broadcast, I have been able to catch this episode numerous times on the Discovery SCIENCE channel. One of the things that makes this program so interesting was that these distant bursts were so powerful, that Einstein's law E=mc^2 might have been violated. This phenomonoe was threatening to unravel the entire world of physics as known ! How this issue gets resolved, saving Einstein (and not a few professional reputations in the process) opens new avenues to investigation into other unknown realms of the distant Universe. For the viewer who has a casual interest in cosmology, sans all the complex mathematics (I was never good in math) then this program is one for you !
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As usual this documentary by Nova is very interesting, well explained, educating and nice to watch due to very high quality images and there are interviews with the scientists conducting the research.

The first part of this documentary film explains the research to find the origin of gamma rays coming to our planet from space. The second part is about the hunt for supernovae.

In the first part it is explained that in 1967 the USA put a satellite in Earth's orbit to detect any secret nuclear explosion tests the Soviets maybe making in space. The satellite was to detect any gamma rays emitted from such tests. Gamma rays are the shortest wavelength form of radiant energy discovered so far and are generated by nuclear explosions during which matter is converted into energy. The satellite was bombarded with gamma ray emissions from all directions from deep space. It became immediately evident that this could not be caused by secret Soviet nuclear testing in space. This started research by scientists around the world to find out what the nature of all these gamma ray burst sources in space were. The research revealed that the sources were far beyond our galaxy, because they were scattered randomly throughout the whole sky. Had they been in our galaxy they would have been concentrated around the milkyway part of our sky.

At first, neutron stars formed by supernovae ( exploding stars ) were suspected. But this view was quickly eliminated because the sources were so far away that the sizes of supernovae explosions would be too small to send the gamma rays all the way to our planet. The explosions must be much bigger.
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This video was informative, the topic really interesting. But their presentation is on the boring side. I wish I could find the BBC video of the same name, it covered the same topic but was quite a bit less boring.
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