Search results
Aristarchus of Samos was the first to seriously calculate the distance to the Sun, using geometry. When the Moon is exactly half illuminated when seen from the Earth (first or last quarter phase), then there is a right triangle between the Earth, Moon, and Sun, with the Moon at the right angle.
4 sty 2015 · French astronomer Jerome Lalande collected all the data and computed the first accurate distance to the Sun: 153 million kilometers, good to within three percent of the true value!
15 lut 2011 · From this, they deduced the distance Earth-Mars. Then, using the Kepler law $$\frac{a^3}{p^2}= constant$$ (where $a$ is the distance between the planet and the Sun, and $p$ the sideral time) they could figure out what was the distance to the Sun.
Average distance to the Sun: 149,600,000 km This is the basis for the astronomical unit (abbreviated as AU) which is based on the Earth-Sun distance. 1 AU = 149 597 871 km
17 maj 2017 · Aristarchus showed how to determine the relative distances and sizes of earth, sun and moon based on eclipses: https://www.youtube.com/watch?v=ozuEb_qLNys. But the fact the sun is so far away that its rays can be considered parallel is obvious already without such calculations.
Sun-Earth distance in Light-Years. A light-year is a unit of length used to measure astronomical distances. One light-year is equal to 9.46 × 1012 kilometers. It is the distance that light can travel in a year (almost 365.25 days). On average the sun is 1.58137 × 10-5 light-years away from the earth.
18 wrz 2012 · Combining their calculations, the astronomers were able to determine a third measurement: the distance between the Earth and the sun. The pair estimated a stretch of 87 million miles --...
