#astronomy
4 articles
BeginnerBorn on the Cusp? Why You Still Have Exactly One Sun Sign
Sign dates shift by up to a day from year to year, which is where the cusp idea comes from. But at your birth moment the Sun stood at one degree, and one degree falls in one sign.
BeginnerHow a Birth Chart Is Actually Calculated: From Ephemeris to Wheel
Behind every chart wheel is astronomy: a date converted to Julian Day, planetary positions from an ephemeris, sidereal time from your longitude, and houses divided from that. Here is the whole chain.
BeginnerTycho Brahe: the nobleman who measured the sky
How the Danish nobleman Tycho Brahe measured the heavens with unmatched precision and built the data behind modern astronomy.
BeginnerThe Astrolabe: Computing the Heavens by Hand
The astrolabe is an analog computer that flattens the sphere of the sky onto a disc. For more than a thousand years it told the time, located the stars, and found the rising degree to cast a horoscope, exactly what AstroAk now does by computer.