Hi Hendy

Yes you are right, A distance vs. time graph (which is usually associated with expressing velocity), formed as a flat line, does indicate 0 acceleration, the velocity is constant. At no time in any of the plots by me or of the “cosmological team” is there any graph or discussion of such a simple plot. If BA thought this, he certainly was not paying attention, and to be honest, I think he quickly put in his two cents with out thinking. I have done that more than a few times myself.

The plot used by the cosmological team to express the “acceleration” of space-time is of intensity verses z which is not a distance only versus time only graph.( http://www-supernova.lbl.gov/public/...ysicsToday.pdf ) This graph corresponds to a distance verses velocity graph. Since distance can be translated to a (look back) time, the graph also corresponds to a time verses velocity graph. If one translates the relationship into the more standard graphical representation for acceleration, the graph has to be redrawn with velocity on the y-axis and time on the x-axis. High school physics textbooks illustrate the expression of acceleration by placing the velocity on the y-axis and time on the x-axis. This is a standard graphical technique. Velocity/ Time is plotted with Velocity on the y-axis and Time on the x-axis.

On a velocity vs. time graph, if the slope is positive, the object is accelerating. If the slope is negative, the object is decelerating. A negative slope with a negative curvature (slope becoming steeper when moving from the abscissa) indicates a deceleration at an increasing rate of deceleration. This is what is indicated by the plot of Type 1asn’s. Please check this out for yourself. Take the graph http://www-supernova.lbl.gov/public/...ysicsToday.pdf and redraw it in the standard V/t format. It’s slope will be negative, indicating deceleration. The slope will also be “flatter” the closer to the beginning of time the 1asn’s are measured.

Snowflake