The perihelion is the point at which earth is closest to the sun, and the aphelion is the point at which earth is farthest away. based on this information, which statement is true? a. earth moves faster along its orbit during perihelion because of the sun's gravitational force. b. perihelion marks the beginning of summer, when earth is closest to the sun. c. the longest day of the year occurs during perihelion due to a lunar eclipse. d. the moon rotates faster during perihelion because of earth's gravitational force.

What is hydroelectric power produced by?

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Describe two recent or ongoing space missions.