![]() ![]() As the Earth is titled, we therefore have Celestial and Ecliptic hemispheres and they can be different for a star. The Ecliptic is the path that the Earth takes as it orbits the Sun. Being in the equatorial region, Tau Ceti can be seen in both terrestrial hemispheres but there is a caveat of depending how far south and north you are. The celestial hemisphere is equivalent to the hemispheres on Earth. īased on the location of Cetus, Tau Ceti can be located in the equatorial region of the celestial sky. If the value is positive, it is north of the celestial equator. The Declination (Latitude) is how far north or south the object is compared to the celestial equator and is expressed in degrees. is positive, then it's eastwards and vice versa. The Right Ascension (Longitude) is expressed in time (hh:mm:ss) and is how far the star is along Earth's celestial equator. These are equivalent to the Longitude and Latitude on Earth. ![]() The location of the Tau Ceti in the night sky is determined by the right ascension (R.A.) and declination (Dec.). ![]()
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