Does precession mis-align ancient monuments?
• Why does the Earth rotate? Why is it a sphere? • What’s so hard about reaching the Sun? • Where does space begin? • Gravity at the Earth’s Center • Radiation hazard in space (3 queries) • “Danger, falling satellites”? • The Lagrangian L3 point • Distance to the Horizon on an Asteroid • Overtaking Planets • Falling Towards the Sun • The Polar Bear • Are the Sun’s Rays Parallel? • More thrust in reverse than going forward? • The varying distance between Earth and Sun • Mission to Mars • Kepler’s calculation • The Appearance (Phase) of the Moon • Stability of Lagrangian points • Can an Asteroid Impact Change the Earth’s Orbit? • Can Gravity Increase with Depth? • Lightspeed, Hyperspace and Wormholes • Why do Rockets Spin? • Around What does the Sun Revolve? • Why are planets in nearly the same plane? • The Shapes of Rockets and Spacecraft • Space Debris • Teaching Nuclear Fusion • Contribution of different elements to Sunlight • Jewish Calendar • Spaceflight Without Escape Velocity? • W
Dear Mr Stern, I live in Ireland. There is an ancient monument at Newgrange in this country which was constructed some 5000 years ago. The particular alignment of the monument to the sun allows an inner chamber to be lit by the sunrise at the winter solstice. The construction of such a building so long ago with such accuracy seems almost incredible to me.
