Hi all, i know that this has been mentioned in a lot of threads here. But im a beginner in the physics and specifically in the relativity, and im very very interest in the relativity and specifically time travel. I read a lot of threads here that talked about the same topic, but i didnt get what it means very well, so, im asking you to tell me a clear explanation for a beginner to help understand it well please I would like to know, If i travelled faster than the speed of light, is this will lead me to travel backward or forward in time?? and how?? and why ?? I read about the twin paradox, i really dont know if i understood it well or no, but i will say here what i understood. That, if i travelled faster than the speed of light for, say, a day, 24 hours hour=60 mins., min=60 secs. This day will be equal to, say, 10 days on eath, so if i landed on earth, i will be in the future, because i stayed 10 days in a day. I tried to think about and calculated it. The light from our sun to the earth takes 8 minutes to reach the earth and as we all know that the speed of light is 300,000 KM/Sec. So i was thinking that if i travelled faster than the speed of light by two times (600,000 KM/Sec.) and from a distance equal to the distance from Earth to sun, so i will take it in 4 mins. (the half time that sun light takes to reach earth). So, let say, The sun light began to travel at 9:52 (according to earth time) and reached earth at 10:00 (earth time). And me will begin at the same time 9:52 and reach earth at 9:56. So, here, i reached the earth in a past event, not a future, because i arrived before the light itself. So, i would like to know where is the truth? am i think right or wrong? So, all i want to know here, is, how can we make the day in a spaceship travelling at a high speed equal to, say, 10 days on the earth? I hope you can get what i mean. Please, make it very very clear as long as you can because as i said, im a beginner. I have another question which is: I read that, speed of light is constant to all observers. ... How ???!! I think that means, that even if i was moving at the half of speed of light, it will still 300,000 KM/Sec. according to me! So what is that?? Thank you. Hadeka.