N.a.s.a
Astronomers.
Scientists classify small objects in the solar system by size, shape, and composition
astronomers
scientists can use them to study the early solar system
astronomers
The best way to tell the difference is by tracking the object. If the object seems to move in an orbit around the Sun, then it is in the solar system. If not, it is outside it.
No one knows it. Scientists lie or exaggerate about knowing. Although the above is partially true, scientists do have theories about how the solar system was formed. If the entire solar system was formed at the same time then all objects in the solar system are the same age. Using radioactive dating of meteorites scientists calculate how long it has been since the meteorite solidified and go based on that date.
Studying smaller objects in the solar system, such as asteroids and comets, can provide insights into the early formation of our solar system and the processes that shaped it. These objects also pose potential threats to Earth, so understanding them better can help us develop strategies to mitigate any potential impacts. Additionally, studying these objects can advance our understanding of planetary science and offer clues about the origins of life in the universe.
Astronomy is the study of the Solar System. Planetary Science, or a Planetologist, studies the planets.
Sirius is not part of our Solar System, so it is not appropriate to talk about "other objects in the solar system".
Objects within the solar system.
Objects within the solar system.