The Highlights Panel is a Lightning component that displays key information about a record at the top of the page. You can customize the Highlights Panel to show different actions based on the record type or other criteria. In this case, you can define dynamic action buttons for the Planet object that appear only if the gaseous field is true or false. This way, you can show different actions for different types of planets.
References: https://help.salesforce.com/s/articleView?id=sf.lex_page_layouts_highlights_panel.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.dynamic_actions_considerations.htm&type=5