Mudcat Café Message Lyrics & Knowledge Personal Pages Record Shop Auction Links Radio & Media Kids Membership Help
The Mudcat Cafeawe

User Name Thread Name Subject Posted
GUEST,Musket again BS: Reinforcing respectful 'boundaries' (1096* d) RE: BS: Reinforcing respectful 'boundaries' 08 Aug 13

Not too sure of your point regarding sat nav. The corrections are built in.

The extraterrestrial trajectory to Mercury has such a low velocity in terms of c,, time dilation is irrelevant. Earth control time delay is a factor but Newtonian calculations will land you where you need to be. You have to reach 0.8c before time and mass start getting interesting.

General relativity was profound and upset a key tenet of the Principia, that of absolute space, absolute time,absolute position. The conundrum is explained with Newton's bucket. But in the observable realistic achievement stakes, f=ma can help plot your trajectory with gravitational slingshot to such a local target quite easily. Interstellar distances with high acceleration, I grant you, we need to take time and mass as variables that would alter the target had we stuck with Newtonian calculations, but even then we would be introducing variables, not superseding.

It is disingenuous to suggest removal of the need for fixed state supersedes the gravity, force and mass concepts. The concepts are there, the mathematical relationships are there, the ratios between them represent his clarification.

Relativity did remove other sacred cows such as the ether, but we need to look at the work of Planck, through to Heisenberg onwards to begin to dismantle the Principia, as we look at the quantum world. Space probes are in the physical word though...

Post to this Thread -

Back to the Main Forum Page

By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.

By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
   * Click on the linked number with * to view the thread split into pages (click "d" for chronologically descending).

By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.

By clicking on the Date (Posted), you will dig out every message posted that day.

Try it all, you will see.