Yeah it is, 'glassing' a planet is orbital bombardment, in essence 'burning a planet'. The heat of the burning beam is so hot that it essentially turns the sand and dirt on the surface of the planet into glass, hence 'glassing'.
OT: How did we manage to do it? You don't even have a body, you're just a sillouhete.
OT: How did we manage to do it? You don't even have a body, you're just a sillouhete.