Astronomy Without a Telescope
- Kepler (archive.org)
In order to emphasise the importance of the reforms introduced into astronomy by Kepler, it will be well to sketch briefly the history of the theories which he had to overthrow. In very early times it must have been realised that the sun and moon were continually changing their places among the stars. The day, the month, and the year were obvious divisions of time, and longer periods were suggested by the tabulation of eclipses. We can imagine the respect accorded to the Chaldaean sages who first discovered that eclipses could be predicted, and how the philosophers of Mesopotamia must have sought eagerly for evidence of fresh periodic laws.
- Alioth (stars.astro.illinois.edu)
ALIOTH (Epsilon Ursae Majoris). The graceful curve of handle of the Big Dipper (the Plough in Great Britain), among the most famed of celestial sights, represents the tail of Ursa Major, the Greater Bear. Third star in from the end, “Alioth” relates not to a bear, but to a “black horse,” the name corrupted from the original and misassigned to the naked-eye companion of Mizar, which took on the vaguely similar name “Alcor.”
- Alioth (Wikipedia)
Alioth /ˈæliɒθ/, also called Epsilon Ursae Majoris, is a star in the northern constellation of Ursa Major. The designation is Latinised from ε Ursae Majoris and abbreviated Epsilon UMa or ε UMa. Despite being designated “ε” (epsilon), it is the brightest star in the constellation and at magnitude 1.77 is the thirty-third brightest star in the sky.
