In the sequence of images shown on the right, you can see a CME erupting from the Sun on the right side of the coronagraph disk. The white circle shows the size and location of the Sun. The black disk is the occulting disk that blocks the surface of the Sun and the inner corona. The lines along the bottom of the image mark off units of the Sun s diameter. Measure its position in each image.
Velocity is defined as the rate of change of position.
You can record your results in a table. Further Questions and Activities Select another feature, trace it, and calculate the velocity and acceleration. Scientists often look at a number of points in the CME to get an overall idea of what is happening.