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Energie ntunecat

n cosmologie, energia ntunecatesteoformde mas-energiedovedit doar teoretic, prezent n totuniversul.Numele ei este oarecum impropriu, deoarece este vorbade o substan (cu mas i energie), i nu doar de o ener-gie.

Exercitnd o presiune negativ ea genereaz o forcare se comport ca o gravitaie negativ (repulsiv).Astfel, energia ntunecat ar putea explica accelerareaexpansiunii universului. Scopul cercetrilor astrofiziceactuale n domeniu este msurarea precis a vitezei de

expansiune a universului, pentru a determina modul ncare aceast expansiune variaz n timp.

Ultimele calcule (2008) arat c universul ar fi constitu-it n proporie de 73%[1] din aceast form dematerie(masenergie).

1 Vezi i

Materie ntunecat

Flux ntunecat

Big Bang

Multivers

Univers paralel

Cameleon (particul ipotetic)

2 Note

[1] Seven-Year Wilson Microwave Anisotropy Pro-

be (WMAP) Observations: Sky Maps, SystematicErrors, and Basic Results (PDF). nasa.gov. http://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdf.Accesat la 2 decembrie 2010. (see p. 39 for a table ofbest estimates for various cosmological parameters)

3 Legturi externe

Oamenii de tiin au descoperit viteza cu care semrete universul, 25 martie 2011,Descoper

1

http://www.descopera.ro/dnews/8096411-oamenii-de-stiinta-au-descoperit-viteza-cu-care-se-mareste-universulhttp://www.descopera.ro/dnews/8096411-oamenii-de-stiinta-au-descoperit-viteza-cu-care-se-mareste-universulhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttp://lambda.gsfc.nasa.gov/product/map/dr4/pub_papers/sevenyear/basic_results/wmap_7yr_basic_results.pdfhttps://ro.wikipedia.org/wiki/Cameleon_(particul%C4%83_ipotetic%C4%83)https://ro.wikipedia.org/wiki/Univers_paralelhttps://ro.wikipedia.org/wiki/Multivershttps://ro.wikipedia.org/wiki/Big_Banghttps://ro.wikipedia.org/wiki/Flux_%C3%AEntunecathttps://ro.wikipedia.org/wiki/Materie_%C3%AEntunecat%C4%83https://ro.wikipedia.org/wiki/Echivalen%C8%9B%C4%83_mas%C4%83%E2%80%93energiehttps://ro.wikipedia.org/wiki/Echivalen%C8%9B%C4%83_mas%C4%83%E2%80%93energiehttps://ro.wikipedia.org/wiki/Astrofizic%C4%83https://ro.wikipedia.org/wiki/Expansiunea_universuluihttps://ro.wikipedia.org/wiki/Accelera%C8%9Biehttps://ro.wikipedia.org/wiki/Gravita%C8%9Biehttps://ro.wikipedia.org/wiki/Presiunehttps://ro.wikipedia.org/wiki/Univershttps://ro.wikipedia.org/wiki/Echivalen%C8%9B%C4%83_mas%C4%83%E2%80%93energiehttps://ro.wikipedia.org/wiki/Echivalen%C8%9B%C4%83_mas%C4%83%E2%80%93energiehttps://ro.wikipedia.org/wiki/Cosmologie

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2 4 TEXT AND IMAGE SOURCES, CONTRIBUTORS, AND LICENSES

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