I just checked with AI again. Gemini says the following: "The Luminosity Distance ($D_L$) *is a measure that accounts for the expansion*, but precisely *because* it includes the energy loss and time dilation effects of the expansion, it gives a distance value that is *larger* than the current, real physical distance (Proper Distance, $D_P$) [1.2].
The standard candle provides $D_L$, but you need to know the redshift ($z$) and use the cosmological model to truly calculate the Proper Distance ($D_P$ ). On Sunday, December 14, 2025 at 4:44:28 PM UTC-7 Alan Grayson wrote: > I plan to check it out again, but I'm pretty sure AI claimed the Hubble's > law gives us the velocity and distance of galaxies in the present, NOW. WRT > distance, it claims that using standard candles, we get the actual distance > NOW, not the distance when the light left some galaxy 10 billion years ago. > Is there concurrence among the humans here? TY, AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/36b4d0c4-3a1c-4084-85ca-81e810f9b166n%40googlegroups.com.
