Astronomers highlight the star Antares, located near the Moon, as a notable red supergiant in our sky. Unlike smaller reddish stars like Proxima Centauri, Antares stands out due to its size and luminosity. In a long-standing rivalry with Betelgeuse, the biggest red star in the sky, Antares is characterized by its Mars-like glow, earning it the name “rival of Mars”. Observing the star can help determine which is the largest between these two celestial bodies.
Source: https://www.wamc.org/show/strange-universe/2025-06-09/time-for-something-big