Here's why:

* Stars age based on their mass: More massive stars burn through their fuel much faster than less massive stars.

* Antares is a red supergiant: Red supergiants are massive stars that have evolved past their main sequence stage.

* Our Sun is a main sequence star: It's still in the process of fusing hydrogen into helium in its core.

Since Antares is a red supergiant, it's already been through the main sequence stage and has a much shorter lifespan. This means it must be older than our Sun, which is still burning hydrogen.

While we don't have a precise age for Antares, astronomers estimate it to be around 10-15 million years old, compared to our Sun's 4.6 billion years.