Physics

Physics, 12.07.2019 23:30, ggg509

Alpha centauri is not only the closest star system to us (it is actually a triple star system) but it also seems to be an excellent place to look for extraterrestrial life. it is about 4.3 light years away from earth. if an astronaut claims her journey there and back only took 6.3 years, then how fast was she traveling? (assume she made a fast turnaround once she arrived there! ) a. 0.68c b. 0.73c c. 0.86c d. 0.81c e. 0.54c

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Physics, 09.07.2019 00:00, formulabmath

If the distance from earth to alpha centauri is 4.34 light-years, then a) alpha centauri is the closest star to earth. b) we see alpha centauri as it was four years ago. c) the distance is equal to 4.34 astronomical units. d) alpha centauri is four times farther from earth than the sun.

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Geography, 27.09.2019 16:10, tipbri9749

2) distances near and beyond the solar system a) we discussed in class that the closest star besides the sun is alpha centauri, which is 4.4 light years away. if it takes 8 light minutes for the light to come from the sun to earth, and 4.4 years from alpha centauri, how much further is alpha centauri compared to the sun? b) how long would it take to get to alpha centauri if you were flying with a (science fiction) spaceship that goes at 1/1000th the speed of light? (discussed in class! ) c) how long would it take to get to alpha centauri with the fast current space craft, called juno, that goes at 266,000 km/h (or 165,000 mph)?

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Geography, 03.10.2019 02:30, kkpowell

Alpha centauri, the closest star to the sun, is 4.3 ly away.

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