Write a function zodiac_sign() that accepts a date as an input and returns the astrological sign of the zodiac corresponding to that date. The date ranges for each sign are given in the following table:

 

Zodiac sign	Start date	End date
Aries	March 21	April 19
Taurus	April 20	May 20
Gemini	May 21	June 20
Cancer	June 21	July 22
Leo	July 23	August 22
Virgo	August 23	September 22
Libra	September 23	October 22
Scorpio	October 23	November 21
Sagittarius	November 22	December 21
Capricorn	December 22	January 19
Aquarius	January 20	February 18
Pisces	February 19	March 20

 

Use the function zodiac_sign to retrieve the zodiac sign of Nicolaus Copernicus whose birth date is February 19, 1473. Store this in the object Copernicus_sign.

(from: Cotton, 2013, Learning R, O’Reilly)