Shukra
Shukra (Sanskrit: शुक्र, IAST: ) is a Sanskrit word that means "clear" or "bright". It also has other meanings, such as the name of an ancient lineage of sages who counselled Asuras in Vedic history. In medieval mythology and Hindu astrology, the term refers to the planet Venus, one of the Navagrahas. Hindu Religion. In Hindu religion, Shukra is the name of a son of Bhrigu, of the third Manu, one of the "saptarishis". He was the guru of Daityas / Asuras, and is also referred to as Shukracharya or Asuracharya in various Hindu texts. He named the Velleeswarar Temple, Mylapore  after the blessings of the Trimurti, to mark the end of a long period of blindness. In another account found in the "Mahabharata", Shukra divided himself into two, one half becoming the knowledge source for the Devas (gods) and the other half being the knowledge source of the Asuras (demons). Shukra, in the Puranas, is blessed by Shiva with Sanjeevni Vidhya after worshipping and impressing Shiva with his Bhakti towards Shiva. Sanjeevni Vidhya is the knowledge that raises the dead back to life which he used time to time and brought back his disciples Asuras back to life. Later, this  knowledge was sought by the Devatas and was ultimately gained by them. Shukra's mother was Kavyamata, whilst Shukra's wives were the goddesses Urjasvati, Jayanti and Sataparva. Sometimes, Urjjasvati and Jayanti merged into one goddess. With her, Shukra produced many children including Queen Devayani. Sataparva was childless. In the "Mahabharata", Shukracharya is mentioned as one of the mentors of Bhishma, having taught him political science in his youth. Astrology. In classical Vedic astrology or Jyotisha, Shukra is considered to be among the Navagrahas which influence the pattern of life on earth. Shukra represents women, beauty, wealth, luxury and procreative  relations. A powerfully placed Shukra, aspected by benefic planets such as Jupiter, and in favourable signs and houses in the birth chart ensures material well being of the native. It’s beej mantra is Om Draam Dreem Draum Sah Shukraya Namaha. It is associated with Friday and the gem diamond. It represents women and female relations. The classical shastras ordain that the best method to attain the blessings of Shukra is to respect the women in one’s life. It is popularly propitiated through Devi Aradhana or worshipping the goddess Lakshmi. Planet. Shukra as a planet appears in various Hindu  astronomical texts in Sanskrit, such as the 5th century "Aryabhatiya" by Aryabhatta, the 6th century "Romaka" by Latadeva and "Panca Siddhantika" by Varahamihira, the 7th century "Khandakhadyaka" by Brahmagupta and the 8th century "Sisyadhivrddida" by Lalla. These texts present Shukra as one of the planets and estimate the characteristics of the respective planetary motion. Other texts such as "Surya Siddhanta" dated to have been complete sometime between the 5th century and 10th century present their chapters on various planets with deity mythologies. The manuscripts of these texts exist in slightly different versions, present Shukra's motion in the skies, but  vary in their data, suggesting that the text were open and revised over their lives. The 1st millennium CE Hindu scholars had estimated the time it took for sidereal revolutions of each planet including Shukra, from their astronomical studies, with slightly different results: Calendar and zodiac. The weekday "Shukravara" in Hindu calendar, or Friday, has roots in Shukra (Venus). "Shukravara" is found in most Indian languages, and Shukra Graha is driven by the planet Venus in Hindu astrology. The word "Friday" in the Greco-Roman and other Indo-European calendars is also based on the planet Venus. Shukra is a  part of the Navagraha in Hindu zodiac system. The Navagraha developed from early works of astrology over time. Deifying planetary bodies and their astrological significance occurred as early as the Vedic period and was recorded in the Vedas. The classical planets, including Venus, were referenced in the Atharvaveda around 1000 BCE. The planet Venus was deified and referred to as Shukra in various Puranas.