apapsis造句

• The orbit has a high eccentricity, bringing RR Lyrae as close as to the Galactic Center at periapsis, and taking it as far as at apapsis.
• At the apapsis and periapsis, the positions of closest and furthest distance from the attracting center, the velocity and radius vectors are perpendicular; therefore, the angular momentum " L 1 " per mass " m " of the particle ( written as " h " 1 ) can be related to the rate of sweeping out areas