Reputed UFO fliers

• They aren't earthlings: Abbr
• Co. that administers the SATs
• Long-distance travelers, in theory
• "Star Wars" walk-ons
• Sci-fi extras
• Superman and Supergirl, briefly
• Extras on many Syfy shows
• "Independence Day" villains
• Men from Mars and women from Venus

Wikipedia Word definitions in Wikipedia
ETS is an abbreviation of: