* The Sun's Lifespan: Our Sun is a relatively small, average-sized star. It has a lifespan of about 10 billion years. It's currently about halfway through its life.
* The Orion Star's Lifespan: The stars in Orion are much larger and hotter than our Sun. They are massive blue giants, and while they are incredibly bright and powerful, they burn through their fuel much faster. These stars have lifespans of only a few million years.
In summary: Even though the Orion stars are much brighter and larger than our Sun, their short lifespans mean they will die out long before our own star.