a hypothetical planet that coincides with a real planet when the real planet is at perihelion and that moves in an orbit at a constant velocity equal to the mean velocity of the real planet.
THIS 5TH GRADE VOCABULARY QUIZ COVERS ALL THE BASICS
This teacher-developed 5th grade word list covers all the basics to prepare students for middle school.
Question 1 of 10
Words nearby mean planet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020