Final answer:
The Alpha Centauri system comprises three stars, Alpha Centauri A and B, which form a binary star system, and Proxima Centauri, which orbits the binary pair.
Step-by-step explanation:
The three objects that make up the Alpha Centauri system are all stars. This system includes Alpha Centauri A and B, which are two bright stars that orbit each other, and the fainter Proxima Centauri. Alpha Centauri A and B are situated 4.4 light-years from Earth, while Proxima Centauri is even closer at 4.3 light-years away.
As Alpha Centauri is visible in the Milky Way galaxy and because each of the three objects emits light and rotates on its own axis, they can be classified as stars rather than asteroids, comets, or planets. In fact, Alpha Centauri A has been noted to emit about the same total energy as our Sun, although it appears much fainter from our perspective because of its vast distance.