#### Sentence Examples

• Ordinary meteors, in the region of the earth's orbit, appear to be separated by intervals of about 250 m.
• Encke, the astronomer who first investigated its orbit and showed its periodicity.
• Another element is the time of revolution of the body in its orbit, called its period.
• It is now known to correspond to the actual orbit of the planet round the sun.
• This, and the inclination of the orbit being given, we have all the geometrical data necessary to compute the coordinates of the planet itself.