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Rahu is usually paired with Ketu, another shadow planet. The time of day considered to be under the influence of Rahu is called Rāhu kāla and is considered inauspicious. [3] As per Hindu astrology, Rahu and Ketu have an orbital cycle of 18 years and are always 180 degrees from each other orbitally (as well as in the birth charts).
'period of Rahu') or rāhukālam (Sanskrit: राहुकालम्, romanized: Rāhukālaṃ) is an inauspicious period of the day, [1] not considered favourable to start any good deed. The rāhukāla spans for approximately 90 minutes every day between sunrise and sunset.
As per Vedic astrology, Rahu and Ketu have an orbital cycle of 18 years and are always 180 degrees from each other orbitally (as well as in the birth charts). This coincides with the precessional orbit of moon or the ~18-year rotational cycle of the lunar ascending and descending nodes on the earth's ecliptic plane.
They are primarily used to calculate the dates of eclipses. They are described as "shadow planets" because they are not visible in the night sky. Rahu and Ketu have an orbital cycle of 18 years and they are always retrograde in motion and 180 degrees from each other.
They are alternately known as the "Dragon's Head" (Rahu, Caput Draconis, or Anabibazon) and the "Dragon's Tail" (Ketu, Cauda Draconis, or Catabibazon). The two nodes together are most commonly referred to simply as the nodal axis, the lunar nodes, or the Moon's nodes. Descending Node ☋ U+260B Lunar apogee: Black Moon, or Lilith ⚸ U+26B8
Astronomy – Axial precession – CNO cycle – Eclipse cycle – Eclipse – Full moon cycle – Galactic year – Great Year – Lunar phase – Mesoamerican calendars – Metonic cycle – Milankovitch cycles – Mira – Moon – Nutation – Orbit – Orbital period – Saros cycle – Sothic cycle – Secularity – Sidereal year ...
Astronomers have long known about the perplexing spokes on Saturn’s rings, which look like apparitions skating along the rings and can be spotted in various locations depending on where the ...
When the asura named Rahu attempted to pose as a deva to receive amṛtam, the nectar of eternal life, Surya and Chandra, the deities of the Sun and the Moon, alerted Mohini, the incarnation of Vishnu. Mohini promptly employed her discus to behead the asura, but he had already partaken the nectar, and had become immortal. Rahu's head was exiled ...