- #1
Wizardsblade
- 148
- 0
When a star or galaxy etc is said to be 10 light years away is that from a standard Earth's velocity distance (ie without length contraction) or do we take into account Earth's velocity and gravitation and have a standard length (maybe accordance with the milkyway being stationary or if we perhaps know about where the big bang was and derive a standard distance from its stationary frame.) A follow up question would be What percent distance would be changed if we did/did not use such frames for standard distances?