“elsewhere”: ds2 < 0, no causal contact

http://slidegur.com/doc/1802674/a-brief-history-of-cosmology

A brief history of cosmology - SlideGur.com

slidegur.com/doc/1802674/a-brief-history-of-cosmology

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... no causal contact 7 Basics of general relativity astronaut in freefall astronaut in inertial frame frame falling freely in a gravitational field “looks like” inertial frame ...

“elsewhere”: ds2 < 0
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PHY306

observer can influence
these events

the light cone: ds2 = 0
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

these events can influence observer

no causal contact
7