Elliptical Galaxy
A galaxy whose structure shaped like an ellipse and is smooth and lacks complex structures such as spiral arms.
A galaxy whose structure shaped like an ellipse and is smooth and lacks complex structures such as spiral arms.
The angular distance of a planetary body from the Sun as seen from Earth. A planet at greatest eastern elongation ...
A table of data arranged by date. Ephemeris tables are typically to list the positions of the Sun, Moon, planets ...
An imaginary circle around a body which is everywhere equidistant from the poles, defining the boundary between the northern and ...
The equinoxes are times at which the center of the Sun is directly above the Earth's equator. The day and ...