* 3. ASSEMBLE THE SCIENCE BOOM.

• Print Parts Sheet 4 onto white card stock. Sheet 4 contains parts for this step and the next.

• Cut out the SCIENCE BOOM. Lightly score lengthwise along the two white lines which separate the three trusswork panels. Fold down the two outboard truss panels away from the printed side. The boom becomes U-shaped in cross-section. Fold the remaining black rectangular panel over to close the box structure. Wrap tab A over mark B and glue.

• Cut out the MAG BOOM (magnetometer boom). Lightly score lengthwise along the two white lines which separate the three long trusswork panels. Fold both long truss panels down lengthwise printed side out, so that the boom becomes triangular in cross section. Bend the three tabs on one side over the edge of the other side to hold the shape. Secure with glue.

• Apply some glue to mark G. Fit this end of the MAG BOOM into the black, square-box end of the SCIENCE BOOM, keeping the seam of the MAG BOOM facing down toward the open side of the U-shaped SCIENCE BOOM. Secure with glue, making sure the MAG BOOM extends straight out of the SCIENCE BOOM.

  

• Optional: Cut a strip of gold-colored foil/paper (such as giftwrap) to fit along the top of the entire length of the SCIENCE BOOM and MAG BOOM. Glue in place covering the top of the booms.