Author Question: Oort-cloud comets are so far from the Sun that the gravity of neighboring stars can alter their ... (Read 68 times)

james0929 · **on:** Jul 27, 2018

Oort-cloud comets are so far from the Sun that the gravity of neighboring stars can alter their orbits.

Indicate whether the statement is true or false

Question 2

When a formal definition of a planet in the solar system was adopted, Pluto was reclassified as a dwarf planet. What characteristic of planets does NOT describe Pluto?

A) Planets orbit the Sun.
B) Planets are approximately spherical.
C) Planets have cleared the neighborhood around their orbit.
D) Planets orbit in ellipses with low eccentricity.
E) Planets orbit in or very near the ecliptic plane.