Displaying all lectures given by: Neta Bahcall

PIRSA:11070087  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Dark Side of the Universe
Speaker(s): Neta Bahcall
Abstract: What is the Universe made of? Recent observations suggest surprising results: not only most of the matter in the Universe is dark and unconventional but, more surprisingly, the major component of the Universe may be in the form of 'dark energy' -- a form of energy that opposes the pull of gravity an... read more
Date: 21/07/2011 - 4:20 pm

PIRSA:09100189  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Meet a Scientist - Prof. Neta A. Bahcall
Speaker(s): Neta Bahcall
Abstract: Observational cosmology, with particular focus on the formation and evolution of large scale structures in our universe like clusters of galaxies as large as 500 million light years. “Weighing” the universe, and mapping out the mysterious dark matter it contains.
Date: 05/10/2009 - 2:40 am
Collection: Meet a Scientist

PIRSA:09060066  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Weighing the Universe
Speaker(s): Neta Bahcall
Abstract: How do we weigh the Universe? Where is the Dark Matter? I will discuss these questions and show that several independent methods, including the observed present-day abundance of rich clusters , the evolution of cluster abundance with redshift, the baryon-fraction in clusters, the observed Mass-to-Li... read more
Date: 24/06/2009 - 2:00 pm

PIRSA:09040052  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Shape of Clusters and Large-Scale Structure
Speaker(s): Neta Bahcall
Abstract: The largest structures in the Universe -- Superclusters of Galaxies -- range in size from a few Mpc to the 'Great Walls' scale of hundreds of Mpc. What is the shape of these large structures -- are they filamentary in nature or are they flattened two-dimensional 'pancakes'? How do they form and evol... read more
Date: 30/04/2009 - 9:00 am
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