One.
One
There are two objects in the solar system which currently support life, those being the planet Earth and the international space station.
No, our Solar System is not the galaxy. Our Solar System is the Sun, and the planets around it (plus a few other objects, such as asteroids and comets). Our Sun (the center of our Solar System) is a star; in the galaxy there are several hundred billion stars, each of which might be called a solar system. At least if it is confirmed that it has planets - but it has already been confirmed that many stars in our neighborhood have planets.
Objects in the outer solar system, such as dwarf planets like Pluto, and Kuiper Belt objects, are believed to have been least modified since the formation of the solar system. These objects are located far from the Sun and have experienced less heating and geological activity compared to objects closer to the Sun. Additionally, some asteroids in the Main Belt between Mars and Jupiter are considered primitive, with little alteration since the early solar system.
The most distant objects in the Solar System are probably comets. However, as that region of space has not been explored, there could be anything out there, even another planet.
the radio telescope
The oldest objects in the solar system whose age has been measured are small grains of dust known as calcium-aluminum-rich inclusions (CAIs) found in meteorites. They are believed to have formed within the first 2-3 million years of the solar system's history. This makes them some of the oldest solid materials known in the solar system.
So far, life has been confirmed ONLY on the 3rd planet- place called Earth.
The oldest objects in our solar system are believed to be the meteorites that have been dated to be around 4.56 billion years old. These meteorites provide valuable information about the early solar system and the processes that occurred during its formation.
The Hubble Space Telescope has been used to detect the oldest and most distant objects in the solar system. Its powerful cameras and instruments help astronomers study these objects, such as distant galaxies and stars, by capturing their light and providing valuable insight into their formation and evolution.
The existence of the so-called UFOs has not been conclusively confirmed. Therefore, we may be receiving visitors from other planets or moons of our own solar system, from other stars, or we may be receiving no visitors at all.
Comets and asteroids are examples of objects that are probably not located in the same region of the solar system in which they originally formed. They are believed to have been influenced by gravitational interactions with planets or other celestial bodies, causing them to migrate to different regions of the solar system.