Credit & Copyright: Umar Mohideen
(U. California at Riverside)
Explanation:
This tiny ball provides evidence that the universe will expand forever.
Measuring slightly over one tenth of a millimeter, the ball moves toward a
smooth plate in response
to energy fluctuations in the vacuum of empty space.
The attraction is known as the
Casimir Effect, named for its
discoverer,
who, 55 years ago, was trying to understand why fluids like
mayonnaise move so slowly.
Today, evidence indicates that most of the
energy density in the
universe
is in an unknown form dubbed
dark energy.
The form and genesis of dark energy is almost completely unknown, but postulated as related to
vacuum fluctuations similar to the
Casimir Effect but generated somehow by space itself.
This vast and mysterious
dark energy
appears to gravitationally repel all matter and hence will likely
cause the universe to expand forever.
Understanding vacuum energy
is on the forefront of research not only to
better understand our universe but also for
stopping micro-mechanical machine parts from sticking together.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Publikacii s klyuchevymi slovami:
Casimir effect - dark energy - effekt Kazimira - temnaya energiya - Vselennaya
Publikacii so slovami: Casimir effect - dark energy - effekt Kazimira - temnaya energiya - Vselennaya | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
