Which of these observations does NOT provide evidence for the heliocentric model of our solar system? Planets move in elliptical orbits. Comets move in regular elliptical orbits Venus shows phases,just like the Moon Earth's gravitational pull keeps its moon in orbit.

## Step 1<br />The heliocentric model of our solar system is the astronomical model in which the Earth and planets revolve around the Sun. This model was proposed by Nicolaus Copernicus in the 16th century.<br /><br />## Step 2<br />The evidence supporting the heliocentric model includes:<br />- Planets move in elliptical orbits: This is consistent with the heliocentric model, as the planets revolve around the Sun.<br />- Venus shows phases, just like the Moon: This is also consistent with the heliocentric model, as Venus orbits the Sun and thus shows phases.<br />- Earth's gravitational pull keeps its moon in orbit: This is consistent with the heliocentric model, as the Earth's gravity keeps its moon in orbit around it.<br /><br />## Step 3<br />However, the statement "Comets move in regular elliptical orbits" does not provide evidence for the heliocentric model. This is because comets do not have regular elliptical orbits. Instead, they have highly elliptical orbits that bring them into the inner solar system, where they can be seen from Earth.