(a) Turn on the Azmuthal Grid (Not the Equatorial Grid). Let's check if the stars are precisely back in the same location after 24 hours. Your response differs from the correct answer by more than 10%. What is the period of the right ascension scale's rotation in hours? Rework your solution from the beginning and check each step carefully. Your response differs significantly from the correct answer. What is the period of the right ascension scale's rotation in minutes? What is the angular speed of the right ascension scale in degrees per second? The angular speed in rotations per minute is What is the angular speed of the right ascension scale in degrees per minute?ĭid you accidentally divide or take the inverse in your calculation? degrees/minuteĬonsider the time for exactly one rotation. These answers have about 10% tolerance, so you will receive credit if you are within 10% of the correct value, which corresponds to approximately 2 significant digits. For example, change the time so that the 13h line is back where it started. (e) Adjust the time (try increasing or decreasing the hours) to rotate the right ascension scale and determine the time change required to make one complete rotation of the ascension scale. (d) Click on the pause/unpause time icon to pause the time (so the time only changes when you adjust it). (c) Click on the time/date rectangle in the lower right corner to display the time/date controls. Adjust the view so you can see some of the values on this scale. This scale is called the right ascension. (b) You can use the mouse to drag the grid left or right so you can read the scale on the grid. (a) Turn on the Equatorial Grid (Not the Azimuthal Grid) at the bottom of the screen. Do not choose Polaris or another star close to the center of rotation. You can use the tools there to determine the rotational speed and period of a star you choose.
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