This is from the transcript of a podcast:
Now, these pictures can be a bit messy. So scientists say they could use plenty of eyes to help scan the pics for things that move—the same way Tombaugh first found Pluto. The winning object could become the most distant ever visited by a spacecraft from Earth.
I can read the sentence in bold literally. But I think it supposed to be like this:
The winning object could become the most distant one that has been ever visited by a spacecraft from Earth.
What is the grammar phenomenon in the sentence? And how should I understand it?