The brightest celestial object in the Milky Way is a matter of interpretation, as it depends on the specific wavelength or band of light being observed. However, one prominent candidate for the brightest object in the Milky Way is the supermassive black hole located at the center of our galaxy, known as Sagittarius A* (pronounced "Sagittarius A-star").
Sagittarius A* emits strong radio waves and is considered one of the most energetic sources of radio emissions in the Milky Way. However, in terms of visible light, it is not a particularly bright object and is challenging to observe directly due to the presence of dense interstellar dust.
Other notable bright objects in the Milky Way include various stars, such as Betelgeuse and Rigel in the constellation Orion, which are among the brightest stars visible in the night sky from Earth. Additionally, there are many star clusters, nebulae, and supernova remnants that can appear bright and prominent in different parts of the Milky Way.
It's important to note that the Milky Way itself is a massive structure composed of billions of stars, and when observed from within it, the combined light of all these stars creates the diffuse glow we see as the Milky Way galaxy.