Astrology and astronomy in Garuda Purana reveal about the twenty seven stars, twelve zodiac signs, as well as about the positions and conjunctions of planets. Lord Surya`s chariot is drawn by seven horses. These seven horses are Vrihati, Gayatri, Ushnika, Trishtupa, Jagati, Pamkti and Anushtapa. Lord Chandra chariot is drawn by ten white horses.
The twenty seven stars are: Bharani, Ashvini, Krittika, Mrigashira, Rohini, Punarvasu, Pushya, Ardra, Magha, Ashlesha, Purvafalguni, Uttarafalguni, Chitra, Vishakha, Hasta, Savti, Jyeshtha, Mula, Purvashada, Uttarashada, Shravana, Dhanishtha, Purvabhadrapada, Shatabhisha, Anuradha, Revati and Uttarabhadrapada.
When Anuradha, Ashvini, Mrigashira, Revati, Mula, Pushya, Punarvasu, Hasta or Jyeshtha is in the sky it is good to begin a journey. Similarly it is said that when Hasta, Vishakha, Chitra, Svati, Uttarafalguni, Anuradha, Uttarashada, Ashvini, Rohini, Pushya, Punarvasu Dhanishtha is in the sky the new clothes should be worn. When Krittika, Bharani, Ashlesha, Magha, Mula, Vishakha, Purvaphalguni, Purvashada or Purvabhadrapada is in the sky then wells and ponds are to be dug. For harvesting crops and constructing temples these stars are fortunate. When Revati, Ashvini, Chitra, Svati, Hasta, Punarvasu, Anuradha, Mrigashita or Jyeshtha is in the sky then seeds should be sown. Boats can also be built when these stars are in the sky. When Rohini, Shatabhisha Ardra, Pushya, Uttarabhadrapada, Dhanishtha, Uttarashada, Uttarafalguni or Shravana is in the sky then coronation should be fixed.
Lunar day is known as a tithi. Fourth day is known as chaturthi. The sixth day is known as shashthi , eighth is known as ashtami, ninth is known as Navami, twelfth day is dvadashi, fourteenth is called chaturdashi. The new moon day is known as amavasya and full moon is known as Purnima. It has been said that one should not travel on the following days Shashthi in the months of Vaishakha and Shravana, Ashtami in the months of Ashvina and Ashada, chaturthi in the months of Jaishtha and Phalguna, dvadashi in the months of Magha and Karthika, dashmi in the month of Agrahayana and Bhadra and chaturdashi in the months of Pausha and Chaitra.
The twelve Zodiac signs are Mesha, Vrisha, Mithuna, Karkata, Simha, Kanya, Tula, Vrishchika, Dhanu, Makara, Kumbha and Mina. Janma rashi is the sun sign under which a person is born is known as janma rashi. The position of the moon in relation to the janma rashi is also considered. First house is the janma rashi. The second house is the next rashi and so on till one has the twelfth house. It is considered that a person will be poor if the moon is in the second house. One would be honoured by a king if the moon is in the third house. There would be quarrels if moon is in the fourth house, if it`s in the fifth house then marriage, if it is in the sixth house then lot of wealth incurred. If the moon is in the seventh house then the person would be highly honoured. There would be a threat to life if the moon is in the eighth house. If the moon is in the ninth house he would get lot of assets and in the tenth house achievement, in the eleventh house it would be victory and in the twelfth house it is a definite demise.
Some of the planet combinations are: in the first house Shukra and Chandra; in the second house Chandra, Budha, Shukra and Brihaspati; in the third house Mangala, Shani and Surya; in the fourth house Budha; Shukra, in the fifth house Brihaspati Chandra and Ketu; in the sixth house Shani, Surya and Mangala; in the seventh house Brihaspati and Chandra; in the eight house Budha and Shukra; in the ninth house Brihaspati; in the tenth house Surya, Shani and Chandra; and in the twelfth house Budha and Shukra. However in the eleventh house al the planets are good.