1. ## Re: ideas

Originally Posted by alecras234
Would you recommend me to learn from this book?
https://www.amazon.co.uk/Patrick-Moo...oore+astronomy
Probably a good book with which to get some great information from.

Also, you might check out this group here on the forum if you haven't already: Online Astronomy Courses - Astronomy Forums | Telescope Forums & Reviews | Astronomy Community

There are several recommendations for free online astronomy courses that you can join and work through at your own pace.

2. ## Re: ideas

Hello Ash, I have not read that book but it is probably a good one to read.

There are a few members here that do Electronic Assisted Astronomy (EAA) maybe this is something you could look into so you would be able to use your telescope.
Looking on the internet there seems to be a couple of different astronomy clubs/ societies in North Wales.
They may be able to help you figure out some things to get you viewing also. North Wales Astronomy Society | Conwy Astronomy Clubs

3. ## Re: ideas

Hi i have started to read this book https://www.amazon.co.uk/Patrick-Moo...40_&dpSrc=srch i'm reading about earths moon and something i found interesting but i don't understand it is the earth/moon barycenter. This is what it says in the book that, It is often said that â€˜the Moon moves around the Earthâ€™. This is true enough, but there is one modification, because strictly speaking the Earth and Moon move together around the barycentre, which is the common centre of gravity of the system. Could you explain what barycenter is in simple terms please? I have watched animation on youtube, it shows the earth has a cross near the edge which doesn't go out of the earth, i dunno.

4. ## Re: ideas

Ash, think of the barycentre this way:

* You have a ruler, and you balance it on a pencil so it's like a seesaw. The centre of gravity is at the centre of the ruler.

* Take a coin, and place it on one end of the ruler. That end tips down because of the added weight.

* To re-establish the balance in the ruler, you need to move the ruler along the pencil so that the pencil is now closer to the coin. You have a new centre of gravity.

Now, with the Moon-Earth system, gravity is what is holding the Moon and Earth together. The Moon's own mass is pulling on the Earth. The centre of gravity of this Moon-Earth system is not at the centre of the Earth, but closer towards the Moon, but still within the body of the Earth. This is the way to understand the barycentre.

I hope this helps

Alex.

5. ## Re: ideas

I have downloaded Worldwide Telescope which looks really good but no idea how to use it, there's nothing on youtube showing you how the program is used, maybe i missed it if there is. Is there a free download of a 3d moon atlas? i downloaded virtual moon atlas but there's lots of things to do to set it up. Is there a 3d atlas i can download with not much setting up to do?

6. ## Re: ideas

The Virtual Moon Atlas is one of the best available, what are you having trouble setting up?

7. ## Re: ideas

coordinates, texture, the list goes on in the How to set up page.

8. ## Re: ideas

This is what im having trouble with en:tutorial [Virtual Moon Atlas]

9. ## Re: ideas

The program is quite easy to use without going through the tutorial.
Input your coordinates and time zone and explore the program. You can explore the different screens by clicking on the tabs.
If you want something specific then look it up in the tutorial afterwards.

10. ## Re: ideas

This online lunar map is pretty straightforward.

quickmap

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