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Quiz: Light Year 1. A light year is a unit of measure for a. Time b. Distance c. Velocity d. luminosity/time interval 2. Calculate the number of meters in 1 light year? 3. Sirius is the brightest star in our night sky. It is 8.6 ly away. Calculate this distance in meters. 4. If a probe orbiting a planet in the Centauri system sent a signal to planet earth today. In what year would the signal to reach us. The Centauri system is approximately 4.6 light years away. 5. The Red giant star Betelgeuse is the eighth brightest star in the night sky. It is located approximately 643 ly away from earth. If Betelgeuse goes supernova today, in what year will we see it on Earth? Quiz: Light Year 1. A light year is a unit of measure for a. Time b. Distance c. Velocity d. luminosity/time interval 2. Calculate the number of meters in 1 light year? 3. Sirius is the brightest star in our night sky. It is 8.6 ly away. Calculate this distance in meters. 4. If a probe orbiting a planet in the Centauri system sent a signal to planet earth today. In what year would the signal to reach us. The Centauri system is approximately 4.6 light years away. 5. The Red giant star Betelgeuse is the eighth brightest star in the night sky. It is located approximately 643 ly away from earth. If Betelgeuse goes supernova today, in what year will we see it on Earth?
