Jupiter with a mobile phone and Celestron Astro FI 102mm Maksutov My name is John, I am new here and now that I am retired I decided to get myself my first ever telescope, why I never got one before I have no idea...probably too busy.
So I thought I would try and get some pics last night from a cloudy  Ross on Wye, Herefordshire. England. UK. Using my mobile as mentioned in the manual.
I appreciate they are not like the amazing ones here but it is my first try. I take it the large black disc is probably a reflection of the mirror? If not can you please tell me what it is. Why does this happen?
I would like to get a different eyepiece other than the 10mm and 25mm I would like a zoom can anyone suggest a reasonable one?
Anyway here are my attempts. Thanks
Congratulations on your purchase.  The first pictures dont' show anything much. Just a out-of-focus blur.
The last one shows Jupiter and three of its moons.  I've overlaid the image onto a simulated image from stellarium (at about 10pm BST, the moons move pretty quick so you need an exact time!):

You can clearly see which moon is which, and why Europa is invisible (it's in line with Jupiter)  Look back tonight and the moons will have moved.  Ganymede will have crossed to the other side, Europa will be visible. Take a series of observations and you can rediscover Kepler's third law.
Jupiter itself is overexposed, which is why you can't see any detail. There is quite a trick to getting the exposure right. Astrophotography is a rabbit hole that goes very deep.
You don't want a &quot;zoom&quot;. You've got a couple of eyepieces.  You don't see any extra detail with a more powerful eyepiece, you just magnify the blur.
But well-done.  You've imaged a solar system body with a telescope.  Galileo would have been proud.