| Slightly brighter today is Alpherg, which is taken as the starting point for the sidereal zodiac. |
| Two physical variables that have been linked to free-response ESP scores, geomagnetism and local sidereal time, are additionally examined. |
| Two clocks were used, one keeping mean time i.e. 24 hours a day, the other sidereal time of 23 hours, 56 minutes and 4 seconds to the day. |
| Over the past few sidereal days more radio signals from an as-yet-unidentified source have been detected. |
| There is also the anomalistic year, although this is even less used than the sidereal year. |
| The reason that sidereal days are shorter is that while the Earth rotates on its axis, it is also moving around the Sun. |
