Besides the earth as a circle (e.g. with latitude longitude lines), a globe (as in desk globe) is one of the most iconic representations of the Earth. It's the closes we can get to a "hands-on" artefact of our planet, and it's an item of curiosity and learning.
The coloured "band" forming the second bar for the "X" could be a straight line. The fact that it is not developed from taking apart the vector-rendering of the Letter "X" in the used font. I like the line not being straight, because it's a nice little metaphor for research and preprints: we have to adjust more often than not.
The used font is https://www.yanone.de/fonts/kaffeesatz/