Here's why:
* Betelgeuse is relatively close: It's about 640 light-years away.
* The universe is vast: There are stars billions of light-years away.
* The concept of "farthest" is constantly changing: As telescopes improve, we can see farther and farther into space, constantly discovering new and more distant stars.
While Betelgeuse is a large and bright star, it's nowhere near the edge of the observable universe.
