Recent content by Arbu

good-oh. There are lots of things you could search for. I searched for "when is the earth north of the sun's equator" and got loads of stuff about the equinoxes, so tried ChatGPT, which gave a more sensible seeming answer, but unfortunately that was wrong too. All it required was someone to...

Most of the answers that I find online confuse the spring and autumn equinoxes with the dates I am looking for. There are one or two answers in the quora article that I referenced in the ChatGPT chat that I now understand to be correct. This is of course not a scientific publication either. It...

No, because it came from ChatGPT, and I've been given a warning for quoting that. So I would just be repeating the harm that I did in quoting ChatGPT if I explain what I understand from it.

I now understand the issue. But in the interests of scientific rigour, it has been decreed that you, and anyone else who comes across this thread, are to remain in the dark. Sorry. I'm expecting the thread to be closed permanently now.

No. The satellite that takes the images is in geostationary orbit and looks straight at the Sun, the tilt of the Earth's axis is irrelevant.

So I understand that the Earth is north of the Sun's equatorial plane in around September to March. So a geostationary satellite observing the Sun would seem more of the Sun's northern Hemisphere than its southern. But, using jHelioViewer to show the Sun with its equator marked on as a...

If it were possible to buy a product that prevented limescale from forming on taps etc. in the first place and so saved me from using Viakal then I would buy it. It's not a question of what I'm trying to do, but what I'd like to do, were it possible.

Thanks, I suspected as much.

Here's a product that's supposed to prevent scale from forming on your taps etc. http://www.scalewizard.co.uk/howitworks.htm The explanation seems a bit woolly to me, e.g. " The electronic disturbance of these crystals stops build up of scale by preventing them from adhering to each other."...

Thanks. 1 in 5,370,675,393 I make it.

Sorry, statistics represents a bit of a gap in my education. What is this C function, and how do I calculate it/look it up? Let's go with exactly 13 of them being right.

If 408 people try to guess someone's birthday, how do you calculate the chance of 13 of them being right? http://www.greasypalm.co.uk/gpforum/forum14/363.html