Related Clues:

• Astronomer's focus
• It's up there
• Old-style anesthetic
• Fifth element
• Pilot's domain
• Firmament
• Some people reach for it
• Flammable liquid
• Berlin's "Blue ___"
• Old number
• Discovery of a Spanish chemist in 1275
• Hit high in the air
• Old-fashioned anesthetic
• Garden spots
• Jet setting