<p>Proxima Centauri is about 4.25 light years away.</p>

<p>4.25 / 0.9 = 4.72 years, for the observer on earth. See fourth grade math for info on the calculation.</p>

<p>For the person on the ship, he is undergoing time dilation of about 2.29, which results in 4.72 / 2.29 = 2.06 years. See for example <a href="https://www.fourmilab.ch/cship/timedial.html" rel="nofollow noreferrer">https://www.fourmilab.ch/cship/timedial.html</a> for info the calculation of the dilation.</p>

CC BY-SA 3.0
2017-07-01T13:32:59.967Z
2017-07-01T13:32:59.967Z
Aganju
<p>Lets say the spaceship is traveling at .9c to Proxima Centauri. How long does this trip take from the observational standpoint of the passenger vs. the observer from Earth?</p>

CC BY-SA 3.0
2017-07-01T09:27:00.690Z
http://www.emc2-explained.info/Dilation-Calc/#.WVdqs-mQzIU
userLTK
CC BY-SA 3.0
2017-07-01T11:29:22.897Z
This is a basic question about special relativity and time dilation. Have you done any prior research?
adrianmcmenamin
<light><general-relativity><time-dilation>
How long would a near-light-speed trip to proxima centauri take from the traveler's and the earth-observer's perspectives?
hedgedandlevered
# How long would a near-light-speed trip to proxima centauri take from the traveler's and the earth-observer's perspectives?

(Asked by: username_0 on 2017-07-01)

Lets say the spaceship is traveling at .9c to Proxima Centauri. How long does this trip take from the observational standpoint of the passenger vs. the observer from Earth?

**Tags:** light, general-relativity, time-dilation

> **Comments:**
> **username_1**: http://www.emc2-explained.info/Dilation-Calc/#.WVdqs-mQzIU  
> **username_2**: This is a basic question about special relativity and time dilation. Have you done any prior research?  

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## 1 answers

### Answer by username_3 on 2017-07-01. Score: 2 | Accepted answer

Proxima Centauri is about 4.25 light years away.

4.25 / 0.9 = 4.72 years, for the observer on earth. See fourth grade math for info on the calculation.

For the person on the ship, he is undergoing time dilation of about 2.29, which results in 4.72 / 2.29 = 2.06 years. See for example <https://www.fourmilab.ch/cship/timedial.html> for info the calculation of the dilation.


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