AU+ICS16CAB

__**Scale Questions:**__
Yes, but it is different because the distances in space require much more scaling down than the ones on earth. When the light left the star, 16 years ago, I wasn't even born yet. It is 63.5 trillion miles away. ** 16.6 trillion X 6 = 99.6 trillion **
 * 1) ====**Does knowing how to use a scale on a map help you understand how to use scale to measure distances in the universe? How are they similar? How are they different?**====
 * 1) ====**Vast distances in space are often measured in light-years. A light-year is the distance that light travels in one year, or about 6 trillion miles. Altair, a star in the constellation Aquila, is 16.6 light-years away, which means that the light we see now from that star left its surface 16 years and 219 days ago. Describe what was happening in the world when the light we are seeing from Altair first left that star. How far away is Altair in miles?**====

It is impossible because we cant go to the planets or even get close enough to get an accurate measurement.
 * 1) ====**Explain why it would be impossible for scientists to measure stellar distances that are accurate to within a few feet. Why is it not critical to attain such accuracy when dealing with astronomical distances?**====

** 2. What are the characteristics of projectile motion? **
-The vertical velocity of a projectile changes by 9.8 m/s each second, The horizontal motion of a projectile is independent of its vertical motion.
 * - **There is a vertical acceleration caused by gravity; its value is 9.8 m/s/s, down,

** motion? **

 * - ** He contributed the laws of motion.