Assessment wanted for Structuring planet data by Sidddharth Pande

I am trying to learn to make tables with HTML and CSS.
I have tried my hand at the planets data exercise at MDN (https://developer.mozilla.org/en-US/docs/Learn/HTML/Tables/Structuring_planet_data), completed and posted the project on codepen. I will attach the link to the codepen here https://codepen.io/siddharth-stn/pen/YzYZzbV.
Please do make an assessment of how I can improve.

Hello @Siddharth_Pande

you doing great well done you can improve the colgroup to be like that

<colgroup>
      <col span="2">
      <col class="nameCol">
</colgroup>

hope that help and have a nice day :slight_smile: