Showing posts with label Doppler Effect. Show all posts
Showing posts with label Doppler Effect. Show all posts

Sunday 23 February 2020

Ignoble Retreat at the Edge where Earth and Firmament meet . . .

Ubi cœlum terræ se conjungit.

                           A host of angels
                                       vent their dirge obscure
           as of a vanquished 
                                       army of cicadas
           to signify alarm or
                                       their displeasure
           called to retreat, scorned
                                       unavailing stardust.

‘. . . and now in little space the confines met
of Empyrean Heav’n and of this World . . .’
                                                                                     Paradise Lost Book 10
                                                                                              1667 John Milton

A Miotic and Dilative Cosmic Eye

In his paper published in April 1930, Zum kosmologischen Problem der allgemeinen Relativitätstheorie, Albert Einstein  speculates briefly on a universe in a process of Expansion (Dilatationsbewegung) and Collapse in an eternal cycle of extinctions and rebirths. His flirtation with Oscillating Universe theory develops from a presumption of ‘spherical  space [spharischen Raum], whose radius is variable over time [and, in consequence, a progressive decrease in expansion follows, which] sets an upper boundary for the radius of the cosmos that cannot be exceeded with the passage of time . . . whereupon the whole process is gone through in the opposite sense (umgekehrtem Sinne) . . .’