These are frames from the special effects storyboard for the episode Collision Course. Most year 1 storyboards were not coloured, but for this episode the planet Atheria is coloured in red and yellow.
Scene 2.
Asteroid L-R heads towards moon
Not seen at this point in the episode, but used a little later (after scene 11B when Paul says "Time's running out").
Scene 3B.
Eagle lowers onto asteroid
Releases 'nuke' lifts off and away
In the episode, the editor inserts a shot of the pilot (from scene 4) between 3A and 3B, and a close-up SFX shot of the nuke being released by the grab arms.