And, you know, the sunspot activity is really, has it changed? Because it seems to go for longer cycles now than it used to go for.

Yeah, yeah.

We've been having strange activity on the sun.

This cycle, we're in sunspot cycle number 25 right now.

It's been a rich cycle.

In other words, we've had a lot of spots mean storms.

People might think that dark spots means that there's less sunlight, less stuff happening.

Now, is there anything you want to tell the listeners about? What type of telescope to maybe look at for the first-time buyer or anything and give them a little guidance?

Well, in the Renaissance, as you mentioned, with this idea of invisible light being a possibility, how did this start to be discovered?

Well, it was really William Herschel who found the first kind.

He projected sunlight through a prism, a piece of cut glass, onto a tabletop, so you had a whole rainbow of colors.

And then he put a thermometer in each color, and he had other thermometers on the side in the darkness to act as controls.

And so he noticed that when the thermometer was in the blue or the green part of the spectrum, the temperature went up very little.

In the yellow, it went up more.

In the red, it went up still more.

Like what? Do you have some examples of this?