SpaceTime with Stuart Gary Series 19 Episode 26 - Galaxy Clusters Reveal Information About Dark Energy4 May 2016, 06:04 UTC
Hi - Stuart with the Show Notes for Series 19 Episode 26:
Galaxy Clusters Reveal Information About Dark Energy
A new study has confirmed that the properties of a mysterious force called dark energy which will determine the ultimate fate of the universe have not changed for billions of years. The findings support the idea that dark energy is best explained by Albert Einstein’s “cosmological constant,” and is equivalent to the energy of empty space.
Back from the deep freeze
Astronomers have discovered a unique comet that appears to have formed in the inner solar system and was then flung out into the deep freeze of the far outer reaches of the solar system, from where it has now returned. This comet could therefore provide important clues about the environment in which the Earth formed 4.6 billion years ago.
Starshot interstellar space ship
Theoretical physicist Stephen Hawking has teamed up with Russian entrepreneur, venture capitalist, and physicist Yuri Milner to promote a plan to send a spacecraft to another star system within a generation. The target will be our nearest stellar neighbour Alpha Centauri 4.3 light-years or 39.9 trillion kilometres away.
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