Which choice correctly lists the attributes a celestial body must posses in order to be labeled a planet? question 4 options: 1. must have a moon 2. must be large enough that its gravity forced it into a spherical shape, 3. must be large enough that its gravity cleared away similar sized objects in its orbit around the star. 1. must have a star orbiting around it. 2. must be large enough that its gravity forced it into a spherical shape, 3. must be large enough that its gravity cleared away similar sized objects in its orbit around the star. 1. must orbit a star 2. must be large enough that its gravity forced it into a spherical shape, 3. must be able to plow through any objects in its orbit 1. must orbit a star 2. must be large enough that its gravity forced it into a spherical shape, 3. must be large enough that its gravity cleared away similar sized objects in its orbit around the star.