How to pronounce“lgm”in English

Now, when we first heard this, we thought that it had to be an intelligent signal because it sounds so regular and so perfect. And it's absolutely right on. It never changes. Sothis was called the LGM signal for a long time-- Little Green Men.We thought it was aliens until we learned what pulsars were. Pulsars, as you may know, when a star goes supernova, it collapses. And all of that rotational inertia is preserved.