Alnilam

If you could catch the hot gas that the star Alnilam is blowing into space, in a million years you’d have enough to make two stars as heavy as the Sun. But you wouldn’t be able to tell any difference in Alnilam itself because it’s one of the monsters of the Milky Way.
Alnilam is the center star in Orion’s Belt, a compact line of three bright stars that rolls high across the south on February evenings.
Alnilam is the most impressive member of the belt. It’s the brightest of the three stars, even though it’s hundreds of light-years farther than the others. And while each of the others consists of two stars, Alnilam moves through the galaxy alone.
Alnilam is a supergiant. It’s roughly 40 times as massive as the Sun, tens of thousands of degrees hotter, and hundreds of thousands of times brighter. Its radiation is so intense, in fact, that it pushes a dense “wind” of charged particles from the surface of Alnilam. The wind races into space at millions of miles an hour.
Although Alnilam is o