Coneheads, e.g., for short

• Short tabloid subjects
• Otherworldly ones, for short
• Many "Futurama" characters, briefly
• Spielbergian visitors
• Venusians, e.g., informally
• SAT org
• Some "The X-Files" extras
• Ones from far away
• Visitors from beyond

Wikipedia Word definitions in Wikipedia
ETS is an abbreviation of: