To be unclear about what one is doing; to be bewildered.

(rhetorical question) Are you a courageous man or a coward?

(space science) An orbit where spacecraft which have reached their end of life can be safely positioned to avoid colliding with other spacecraft or the Earth.

plural of graveyard orbit

plural of orange grove

plural of orbital motorway

plural of orbital plane

plural of orbital quantum number

plural of chicken-or-egg question

plural of Clarke orbit