Hello
I have finished “HTML tables” section and completed the task “Structuring planet data”.
I will be grateful for assistance
Great work, @cherewchyk!
I only see a few tiny improvements:
- For the
<col>elements you could use thespanattribute to make it more concise:<colgroup> <col span="2"> <col style="border:2px solid #000000;"> <col span="9"> </colgroup> - The “Gas giants”
<th>should havescope="rowgroup"since it spans two rows. - Same for “Ice giants”.
- “Dwarf planets” targets only a single row. So it should have
scope="row".
Aaaaaand that’s it! 
Stay safe,
Michael