wrote in message
...
On Mar 11, 9:56 pm, Randy Poe wrote:
On Mar 11, 3:51 pm, "Androcles" wrote:



"dlzc" wrote in message

...
Dear ram.rachum:

On Mar 11, 12:08 pm, "
wrote:

Hello again,

Assume I take a spaceship to Alpha Centauri, which is
4 light years away.

| ... when measured at rest.

HAHAHA!
How do you that, ****-for-brains?

No problem, we'll add "measuring distance to stars"
to the list of established science you don't
believe in, in your pre-1850 version of physics.



And the ship goes so fast, that the travel time seems
to me to be one hour. Will it not seem to me that
Alpha Centauri made a journey that started at x=4[ly]
and ended at x=0, during a time of one hour, and
therefore its speed was much faster than lightspeed?

| No. Were you to measure the distance by, say, parallax, you would see
| that Alpha Centauri was *much* closer than 4 light years, and that its
| relative speed was less than c.

Ignorant LIAR!

Where is my mistake?

| Frame jump. You use a distance measured in one frame, and a duration
| from a different frame.

Snivelling idiot; the time is one hour, the speed is 4ly/hour.

No problem, we'll add "stellar aberration" to
the list of well-established science you don't
believe in, in your pre-1850 version of physics.

- Randy

| Randy, please don't continue the argument with Androcles. Thank you.

What's it to you, nymshifter?