The only item on that list that's part of our solar system is "a star". We do have one of those relatively nearby. It's the one we call "the sun".
Milky Way: About 100,000 light-years in diameter Universe: Unknown, but the observable Universe has a diameter of about 92 billion light-years. Solar System: There are different definitions for the limits of the Solar System; if you include the Oort Cloud, you would have a diameter of about 4 light-years. That's a radius of about 2 light years, taking you about half way to the nearest star. With many other commonly used definitions, the "Solar System" is much smaller.
Sirius is not part of our Solar System, so it is not appropriate to talk about "other objects in the solar system".
Voyager 1 and Voyager 2 have both left the heliosphere, but neither has left the solar system. The edge of the solar system is considered to be the outer boundary of the Oort Cloud, The exact width of the Oort Cloud is not known, but its estimated that it would take Voyager 2 about 300 years to reach the inner boundary of it. To reach the outer boundary of the Oort Cloud, truly leaving the solar system, would take Voyager 2 something like 30,000 years.
Natural objects that orbit a star form that star's solar system. The name comes from the name of our star, which is Sol. Earth is part of the Solar System. Another star's system might be referred to by the name of that star, as in the Polaris System.
our solar system is part of the milky way galaxy
Nope, Solar System is part of the Galaxy.
Nope, Solar System is part of the Galaxy.
No. The solar system is part of the galaxy.
Our solar system is in a galaxy called the Milky Way. There are pulsars in our galaxy, but not in our solar system.
Our solar system is located in the Orion arm of the Milky Way Galaxy.
Our Solar System is part of the Milky Way Galaxy
Yes, the solar system is a tiny part of the Milky Way Galaxy, and yes, the moon is a part of the solar system by virtue of the fact that it orbits the earth (which is part of the solar system).
Milky Way Galaxy
If you mean "a part", it's the other way round: the Solar System is a part of the Milky Way galaxy.
our solar system is part of the milky way galaxy
The solar system is only a small part of a galaxy. The Milky Way, galazy in which our solar system is found, has other solar systems.