This transcript has been automatically generated and may not be 100% accurate.

... I ... she says the sex ... depending on your location ... the rarest astronomical events will occur ... the two thousand twelve the mixture and six ... this animation released when ... the shows an artist's conception of the event ... starting on the surface of Venus ... my next class ... to insert a Greek or the ... convenience of us moving more ... I ... Sabine is always Iran has ... the use of art ... it takes more than a century of them to her again for ... the next one will be in December ... twenty one seventy ... the last return ... this is in the millions in you ...