Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
How long would it take to travel to Tau Ceti that is 12 Light years away from us, with existing technology? - Quora
![SOLVED: Tiwin A makes a round trip at 0.6 c to a star 12 light-years away, while twin B stays on the earth. Each twin sends the other a signal once a SOLVED: Tiwin A makes a round trip at 0.6 c to a star 12 light-years away, while twin B stays on the earth. Each twin sends the other a signal once a](https://cdn.numerade.com/ask_previews/e41861d6-7697-4303-8db6-bb2fd537bdd3_large.jpg)
SOLVED: Tiwin A makes a round trip at 0.6 c to a star 12 light-years away, while twin B stays on the earth. Each twin sends the other a signal once a
![Earth-like planet is spotted 150 light years away - and it may have the right conditions to host alien life | Daily Mail Online Earth-like planet is spotted 150 light years away - and it may have the right conditions to host alien life | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2016/11/29/12/3ADA1B9600000578-0-image-a-5_1480421166897.jpg)