round but some rounder than others. Every object is in an orbit which is an ellipse. The planets are in orbits which look almost exactly like circles with an offset centre, but some comets and dwarf planets have orbits with a high eccentricity.
the other members surround the sun and revolve around it, each in its own orbit
All planets in our solar system have elliptical orbits.
No. Pluto orbits in our solar system.
the solar system
Our moon orbits Earth, which is the third planet from the sun in our solar system.
Yes. Halley's Comet is a comet that orbits our sun, and the definition of "Part of the solar system" is 'Any object that orbits our sun.'
circular
in fixed orbits
Comets. Periodic comets have highly eccentric elliptical orbits, with eccentricities.
All planets in our solar system have elliptical orbits.
Kepler discovered the orbits of the solar system are elliptical.
Yes, everything that orbits our sun, including everything that orbits everything that orbits our sun, is part of the solar system.
No. Pluto orbits in our solar system.
A moon orbits a planet.
the shape of our solar system is an oval.
The heart is the star around which the solar system orbits. In our solar system the heart would be our sun
None of the planets pass out of our solar system. The orbits of the planets, irregular as they may be IS the solar system.
Mercury has an elliptical orbit, it is also one of the most eccentric orbits of our solar system.