eli5: If the sun revolves around the galaxy, why do we still see the same constellation that was discovered by the Romans (probably 1000s of years ago). surely they should have been scattered by now due to revolution of the sun combined with the revolution of the earth around with sun

Question

Thnx to all, for the answer. I had a good time discussing and clearing my doubt.

In: 179

Answer 1

The signs of the zodiac and their applicable dates have changed since they were set around 1000 years ago:

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|Star sign|Was From|Was Days|Now From|Now Days|
|:-|:-|:-|:-|:-|
|Aries|Mar 21|30|Apr 19|25|
|Taurus|Apr 20|31|May 14|37|
|Gemini|May 21|31|Jun 20|31|
|Cancer|Jun 21|32|Jul 21|20|
|Leo|Jul 23|31|Aug 10|37|
|Virgo|Aug 23|31|Sep 16|45|
|Libra|Sep 23|30|Oct 31|23|
|Scorpio|Oct 23|30|Nov 23|7|
|Ophiuchus|||Nov 30|18|
|Sagittarius|Nov 23|29|Dec 18|32|
|Capricorn|Dec 22|29|Jan 19|28|
|Aquarius|Jan 20|30|Feb 16|24|
|Pisces|Feb 19|30|Mar 12|38|

“Zodiac” is both an astrological **and** astronomical term. You probably know that the solar system is disc-shaped; if you extend that disc until it meets the next galaxy, then that galaxy is on the zodiac. *Which* galaxy is the one you would see during the day if the Sun didn’t exist, or the one which is visible in the southern night sky, but six months early (or late).