"Probing the Dark Universe" - A Lecture by Dr. Josh Frieman
Δημοσιεύτηκε στις 6 Ιουν 2016
In
this one-hour public lecture Josh Frieman, director of the Dark Energy
Survey, presents an overview of our current knowledge of the universe
and describe new experiments and observatories. Over the last two
decades cosmologists have made remarkable discoveries: Only 4 percent of
our universe is made of ordinary matter - atoms, molecules, etc. The
other 96 percent is dark, in forms unlike anything with which we are
familiar. About 25 percent is dark matter, which holds galaxies and
larger-scale structures together and may be a new elementary particle.
And 70 percent is thought to be dark energy, an even more mysterious
entity which speeds up the expansion of the universe. Josh Frieman is
senior staff scientist at the Fermilab and Professor of Astronomy and
Astrophysics and member of the Kavli Institute for Cosmological Physics
at the University of Chicago. The Dark Energy Survey is a collaboration
of 300 scientists from 25 institutions on 3 continents, which built and
uses a powerful 570-Megapixel camera on a telescope in Chile to carry
out a 5-year survey of 300 million galaxies and thousands of supernovae
to probe dark energy and the origin of cosmic acceleration.
this one-hour public lecture Josh Frieman, director of the Dark Energy
Survey, presents an overview of our current knowledge of the universe
and describe new experiments and observatories. Over the last two
decades cosmologists have made remarkable discoveries: Only 4 percent of
our universe is made of ordinary matter - atoms, molecules, etc. The
other 96 percent is dark, in forms unlike anything with which we are
familiar. About 25 percent is dark matter, which holds galaxies and
larger-scale structures together and may be a new elementary particle.
And 70 percent is thought to be dark energy, an even more mysterious
entity which speeds up the expansion of the universe. Josh Frieman is
senior staff scientist at the Fermilab and Professor of Astronomy and
Astrophysics and member of the Kavli Institute for Cosmological Physics
at the University of Chicago. The Dark Energy Survey is a collaboration
of 300 scientists from 25 institutions on 3 continents, which built and
uses a powerful 570-Megapixel camera on a telescope in Chile to carry
out a 5-year survey of 300 million galaxies and thousands of supernovae
to probe dark energy and the origin of cosmic acceleration.
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