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...Infrared_Astronomy/Fermilab_search.htm| title=Fermilab Dyson Sphere search program| date=2006| access-date=2006-03-02| first=Dick| last=Carrigan| url-status=d ...Infrared_Astronomy/Fermilab_search.htm| title=Fermilab Dyson Sphere search program| date=2012| access-date=2012-01-15| first=D.| last=Carrigan| url-status=dea ...

{{About||the redshift caused by Doppler effect|Doppler shift}} ...hange in wavelength (positive for redshifts, negative for blueshifts), and by the wavelength ratio {{math|1 + ''z''}} (which is greater than 1 for redshi ...

...., [[Google Search]]), [[recommender system|recommendation systems]] (used by [[YouTube]], [[Amazon (company)|Amazon]], and [[Netflix]]), interacting [[n ...f optimism,<ref name="AI in the 60s"/><ref name="AI in the 80s"/> followed by periods of disappointment and loss of funding, known as [[AI winter]].<ref ...

| image_alt = Photograph of Earth taken by the Apollo 17 mission. The Arabian peninsula, Africa and Madagascar lie in ...[land hemisphere]]. Most of Earth's land is somewhat [[humid]] and covered by vegetation, while large [[Ice sheet|sheets of ice]] at [[Earth's polar regi ...