Bhubaneswar (Odisha) [India], April 27 (ANI): After 1,000 years, a rare and unique astronomical event will take place during the last week of April when four planets including Venus, Mars, Jupiter and Saturn will align in a straight line in the eastern sky for around one hour before the sunrise, said Subhendu Pattnaik, Deputy Director, Pathani Samanta Planetarium, Bhubaneswar.