On 21 Sep, 03:47, "Bast" wrote:
RichD wrote:
When and how did astronomers determine that the earth's axis
tilts from the ecliptic, and its value?
I guess the answer depends on who you ask.
http://search.yahoo.com/search;_ylt=...Ed5ebvZx4?p=Wh...
Just like Galileo is often credited for claiming the earth went around the
sun.
His research was based on Copernicus's work, and who knows where Copernicus
got the idea.
He used data collected by Tycho Brahe