How to pronounce “brightening”(verb) in English

Same thing with cloud brightening. These cloud brightening ideas, you try brightening a few clouds, you see what happens; it doesn't work, you don't like the way it works, it's

as long as anybody and he had a lot of ideas about how you would put particles in the stratosphere, how these cloud brightening things might work; he was also interesting in building machines

In this case, they're brightening the images; they're also delaying

of a water droplet which goes up and joins the ocean clouds and makes them brighter, thereby brightening the whole damn planet or at least that part of the oceans by whatever

And that was what Hubble did is he said, "Well, if I see this variable star and I see how it's brightening and faintening,