* 2. ASSEMBLE THE SPUN BUS.

• Print Parts Sheet 3 onto white card stock.

• Cut out the SPUN BUS. Each of the eight segments represents an equipment bay. Lightly score along the two long parallel white lines, and along the eight vertical white lines.

• Bend the SPUN BUS into an octagon, with the printed details outside, by pinching a crease into each of the vertical white lines. Fold the small rectangular tab at one end, and glue it onto the opposite end of the SPUN BUS to close the octagon.

• Find a tab labeled with a white arrow on the SPUN BUS. Bend it over, toward the inside of the octagon. Bend the 7 adjacent tabs over in the same direction.

• Cut out the octagonal BUS SUPPORT, and position it up inside the SPUN BUS, to hold its shape. Its black side should face up towards the outside. Glue the bent tabs to the BUS SUPPORT. This is now the BOTTOM of the SPUN BUS.

• Bend down the eight tabs on the remaining (top) side of the SPUN BUS toward the center, forming a shelf at right angles to the walls of the bus.

• Cut out the BOOM SUPPORT STRUCTURE. Slit along the shaded line outboard of G. Slit the small shaded line "A" outboard of S S.

• Color the white underside of tab G, using a black felt tip pen.

• Lightly score along both black lines which go straight out from S S.

• Fold tabs X and Y up 90 degrees toward the black side. These represent science instruments: tab X the EUV, and tab Y the HIC (see Galileo information links).

• Keep the side with the printed letters on the BOOM SUPPORT STRUCTURE facing UP. On the SPUN BUS, locate the tab marked S. Glue the BOOM SUPPORT STRUCTURE onto the top of the SPUN BUS so that the black area labelled S S aligns over the tab marked S. Align the black corners marked 1 and 2 with the corners of the SPUN BUS so it centers nicely. Allow the glue to dry.

• Cut out the part labeled STAR SCANNER. Slit along the shaded line. Color the white side black, using a felt tip pen. Slide it together at right angles, slot into slot, with its other half (marked G) on the BOOM SUPPORT STRUCTURE. Secure with glue, keeping the outboard ends even and perpendicular. Apply glue where it meets the SPUN BUS top.

• The trusswork protruding from S S is the SCIENCE BOOM SUPPORT. Bend it down as far as it will go, to make a crease at S S. Lift it up again, and bend its two triangular side panels down at right angles to the center portion. Bend the SCIENCE BOOM SUPPORT down again, and glue the ends of the triangular trusses to the SPUN BUS where they touch, below each S.

• Find two small white dots near the end of the roughly triangular structure marked 2. Fold down the two black arms which are marked by these white dots. The tip of each of these arms will approach a small white dot on the SPUN BUS. Glue the end of each arm to the SPUN BUS where it touches, near the white dot.

• Repeat the above step with the structure marked 1. These structures, 1 and 2, are the RTG BOOM supports.

• Cut out the HGA SUPPORT. Wrap it into a cylinder, bringing the white end around to meet the black end, keeping the black side out. Apply glue to the white end and overlap the black end onto it. Adjust its shape to be an even cylinder.

  

• Glue one end of the HGA SUPPORT cylinder down onto the top of the SPUN BUS, centering it over the white circle.