NASA | The Mystery of Dark Energy
Δημοσιεύθηκε στις 1 Ιαν 2014
In 1998, two groups presented
startling evidence that the expansion of the universe is accelerating,
and the term "dark energy" was coined as a label for the cause of the
acceleration. What is the nature of this mysterious component that we
now believe makes up more than 70 percent of the energy density of the
universe? What types of evidence for dark energy are there, and how
solid is it? What techniques will yield better answers? What are the
next steps? These are a few of the questions that have captured the
attention of cosmologists as well as the general public. This talk will
attempt to explain the questions and a few of the answers.
von Kármán Lecture
Speaker:
Dr. Michael Seiffert
JPL Research Scientist
Release Date: 11 December 2008
Credit:
NASA Jet Propulsion Laboratory (JPL)
startling evidence that the expansion of the universe is accelerating,
and the term "dark energy" was coined as a label for the cause of the
acceleration. What is the nature of this mysterious component that we
now believe makes up more than 70 percent of the energy density of the
universe? What types of evidence for dark energy are there, and how
solid is it? What techniques will yield better answers? What are the
next steps? These are a few of the questions that have captured the
attention of cosmologists as well as the general public. This talk will
attempt to explain the questions and a few of the answers.
von Kármán Lecture
Speaker:
Dr. Michael Seiffert
JPL Research Scientist
Release Date: 11 December 2008
Credit:
NASA Jet Propulsion Laboratory (JPL)
Κατηγορία:
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Τυπική άδεια YouTubeANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 23/3/2014
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