Hvordan forsøgte man at måle parallakse på Tycho Brahes tid? Citat: ... han i stand til at måle vinkler på himlen med en nøjagtighed på at par bueminutter. ... Solen, er så langt væk, at dens parallakse er mindre end et buesekund. Det er omkring 100 gange mindre end Tycho Brahes målenøjagtighed.
Hvordan forsøgte man at måle parallakse på Tycho Brahes tid? Citat: Hans omhyggelige målinger viste at stjernerne stod helt stille på himlen - de flyttede sig overhovedet ikke i årets løb. Derfor konkluderede han, at Jorden stod stille i forhold til stjernerne.
sciencedaily.com
NASA/Goddard Space Flight Center. (2014, April 11). NASA's Hubble extends stellar tape measure 10 times farther into space. ScienceDaily Citat: "...Astronomers have developed yet another novel way to use the 24-year-old space telescope by employing a technique called spatial scanning, which dramatically improves Hubble's accuracy for making angular measurements. The technique, when applied to the age-old method for gauging distances called astronomical parallax, extends Hubble's tape measure 10 times farther into space...The diameter of Earth's orbit is the base of a triangle and the star is the apex where the triangle's sides meet. The lengths of the sides are calculated by accurately measuring the three angles of the resulting triangle. Astronomical parallax works reliably well for stars within a few hundred light-years of Earth...."
