var threeObjects = {"steps": [{"caption": "Three stars. The top and left stars will move towards the center star.",
                               "objects": [{"object": mainSequenceStar, "x": [0, 0], "p": [0,0], "m": 1, "label": "Center"},
                                           {"object": mainSequenceStar, "x": [10, -20], "p": [0, 1], "m": 1, "label": "Top"},
                                           {"object": mainSequenceStar, "x": [-20, 10], "p": [1, 0], "m": 1, "label": "Left"}],
                               "frame": 0},
                              {"caption": "Let's see that again, but this time from the perspective of the top star.",
                               "objects": [{"object": mainSequenceStar, "x": [0, 0], "p": [0,0], "m": 1, "label": "Center"},
                                           {"object": mainSequenceStar, "x": [10, -20], "p": [0, 1], "m": 1, "label": "Top"},
                                           {"object": mainSequenceStar, "x": [-20, 10], "p": [1, 0], "m": 1, "label": "Left"}],
                               "frame": 1}
                             ]
                   };

var headOnObjects = {"steps": [{"caption": "Three stars. The left and right stars approach the center star at high speed.",
                               "objects": [{"object": mainSequenceStar, "x": [0, 0, 0], "p": [0, 0], "m": 1, "label": "Center"},
                                           {"object": mainSequenceStar, "x": [-30, 10, 0], "p": [0.9, 0], "m": 1, "label": "Left"},
                                           {"object": mainSequenceStar, "x": [30, 10, 0], "p": [-0.9, 0], "m": 1, "label": "Right"}],
                               "frame": 0},
                              {"caption": "Let's see that again, but this time from the perspective of the far-left star. Notice how different it appears.",
                               "objects": [{"object": mainSequenceStar, "x": [0, 0, 0], "p": [0, 0], "m": 1, "label": "Center"},
                                           {"object": mainSequenceStar, "x": [-30, 10, 0], "p": [0.9, 0], "m": 1, "label": "Left"},
                                           {"object": mainSequenceStar, "x": [30, 10, 0], "p": [-0.9, 0], "m": 1, "label": "Right"}],
                               "frame": 1,
                               "origin": [150, 200, 0]}
                             ]
                    };

@@ -1247,16 +1247,47 @@
 gh speed
+ - 0.9 times the speed of light
 .%22,%0A    
@@ -1500,35 +1500,35 @@
 , 10, 0%5D, %22p%22: %5B
-0.9
+2.1
 , 0%5D, %22m%22: 1, %22l
@@ -1632,35 +1632,35 @@
  10, 0%5D, %22p%22: %5B-
-0.9
+2.1
 , 0%5D, %22m%22: 1, %22l
@@ -1847,39 +1847,86 @@
 ar. 
-Notice how different it appears
+The rightmost star only approaches at 0.995c &mdash; not the 1.8c you'd expect
 .%22,%0A
@@ -2151,19 +2151,19 @@
 , %22p%22: %5B
-0.9
+2.1
 , 0%5D, %22m
@@ -2283,19 +2283,19 @@
  %22p%22: %5B-
-0.9
+2.1
 , 0%5D, %22m

Update demo to be more specific