When you click "Start research", the name changes to "Space science pack (Researching)".
When the research is complete, the name remains as "Space science pack (Researching)" until the tech tree is closed and re-opened.
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After re-opening the tech tree, the name now shows as "Space science pack (Researched)".
If you are in creative mode, clicking "Un-research" will not update the name until the menu is re-opened.