| A | B |
|---|
| ancient | belonging to times long past; people who lived long ago |
| astronaut | pilot or member of the crew of a spacecraft |
| flight | act or manner of flying; running away |
| interrupt | break in upon (talk, work, rest, or a person speaking) |
| January | the first month of the year |
| million | one thousand thousands |
| modern | of the present time |
| nineteen | nine more than ten |
| orbit | path of the earth or any one of the planets about the sun |
| planet | one of the heavenly bodies that move around the sun |
| platform | a raised level surface |
| preparation | preparing; making ready |
| protect | shield from harm or danger |
| protection | act of protecting |
| rocket | device consisting of a tube open at one end in which an explosive or fuel is rapidly burned |
| soar | fly at a great height |
| suggest | bring to mind |
| telescope | an instrument for making distant objects appear nearer and larger |
| zero | nothing; none at all |
| ninth | next after the eighth |
| treat | act toward |
| receiver | an apparatus or device that converts incoming electromanetic waves or electrical signals into audible or visual signals |
| snap | to speak sharply, abruptly, or irritably |
| disease | sickness; an illness |
