Alex Filippenko: "Dark Energy and the Runaway Universe", Talks at Google
Δημοσιεύτηκε στις 13 Ιαν 2014
We expected the attractive force of
gravity to slow down the rate at which the Universe is expanding. But
observations of very distant exploding stars (supernovae) show that the
expansion rate is actually speeding up, a remarkable discovery that was
honored with the 2011 Nobel Prize in Physics to the teams' leaders.
Over the largest distances, the Universe seems to be dominated by a
repulsive "dark energy" -- an idea Albert Einstein had suggested in 1917
but renounced in 1929 as his "biggest blunder." It stretches space
itself faster and faster with time. But the physical origin and nature
of dark energy, which makes up about 70% of the contents of the
Universe, is probably the most important unsolved problem in all of
physics; it may provide clues to a unified quantum theory of gravity.
About
the Speaker: Alex Filippenko is the Richard & Rhoda Goldman
Distinguished Professor in the Physical Sciences. His accomplishments,
documented in about 700 research papers, have been recognized by several
major prizes, and he is one of the world's most highly cited
astronomers. In 2009 he was elected to the National Academy of Sciences,
and he shared part of the Gruber Cosmology Prize in 2007. He has won
the top teaching awards at UC Berkeley and has been voted the "Best
Professor" on campus a record 9 times. In 2006 he was selected as the
Carnegie/CASE National Professor of the Year among doctoral
institutions, and in 2010 he won the ASP's Emmons Award for
undergraduate teaching. He has produced five astronomy video courses
with "The Great Courses," coauthored an award-winning textbook, and
appears in numerous TV documentaries including about 40 episodes of "The
Universe" series. An avid tennis player, hiker, and skier, he enjoys
world travel and is addicted to observing total solar eclipses (11 so
far).
gravity to slow down the rate at which the Universe is expanding. But
observations of very distant exploding stars (supernovae) show that the
expansion rate is actually speeding up, a remarkable discovery that was
honored with the 2011 Nobel Prize in Physics to the teams' leaders.
Over the largest distances, the Universe seems to be dominated by a
repulsive "dark energy" -- an idea Albert Einstein had suggested in 1917
but renounced in 1929 as his "biggest blunder." It stretches space
itself faster and faster with time. But the physical origin and nature
of dark energy, which makes up about 70% of the contents of the
Universe, is probably the most important unsolved problem in all of
physics; it may provide clues to a unified quantum theory of gravity.
About
the Speaker: Alex Filippenko is the Richard & Rhoda Goldman
Distinguished Professor in the Physical Sciences. His accomplishments,
documented in about 700 research papers, have been recognized by several
major prizes, and he is one of the world's most highly cited
astronomers. In 2009 he was elected to the National Academy of Sciences,
and he shared part of the Gruber Cosmology Prize in 2007. He has won
the top teaching awards at UC Berkeley and has been voted the "Best
Professor" on campus a record 9 times. In 2006 he was selected as the
Carnegie/CASE National Professor of the Year among doctoral
institutions, and in 2010 he won the ASP's Emmons Award for
undergraduate teaching. He has produced five astronomy video courses
with "The Great Courses," coauthored an award-winning textbook, and
appears in numerous TV documentaries including about 40 episodes of "The
Universe" series. An avid tennis player, hiker, and skier, he enjoys
world travel and is addicted to observing total solar eclipses (11 so
far).
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