The term ASTRA is composed of four words: ASPERA (6 letters), OPEL (4 letters), ARDUA (5 letters), and OPELS (5 letters). ASPERA is a Latin word meaning 'DIFFICULT' or 'HARD'. OPEL is a German automobile manufacturer founded in 1863. ARDUA is a Latin word meaning 'HARD' or 'DIFFICULT'. OPELS is the plural form of OPEL, referring to multiple vehicles produced by the company. Together, these words form the term ASTRA, which can refer to a variety of things, including a type of rocket, a constellation, and a type of flower.