The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
Campion in 2010
Campion in 2010
Precessional movement as seen from 'outside' the celestial sphere. The rotation axis of the Earth describes over a period of about 25,800 years a smal
Precessional movement as seen from 'outside' the celestial sphere. The rotation axis of the Earth describes over a period of about 25,800 years a small circle (blue) among the stars, centred on the ecliptic northpole (blue E) and with an angular radius of about 23.4°: the angle known as the obliquity of the ecliptic. The orange axis was the Earth's rotation axis 5000 years ago when it pointed to the star Thuban. The yellow axis, pointing to Polaris is the situation now. Note that when the
An early Christian inscription ichthys carved with Greek letters into marble in the ancient Greek ruins of Ephesus, Turkey
An early Christian inscription ichthys carved with Greek letters into marble in the ancient Greek ruins of Ephesus, Turkey