Subject: Acceleration up to speed of light...

Acceleration up to speed of light...
Hi... Once I worked out that if a spacecraft were able to accelerate 
Constantly, at ONE G-FORCE..
ie: 32ft/sec/sec it would take approximately 2.5 years to reach 
the actual speed of light (relative to Earth) point of departure..
Which would also be practical as it would mean the astronauts would 
be able to live comfortably as they would experience the same gravity
as if on Earth... Anyway, as with the doppler effect, at that speed,
would they not notice different constallations in different colours?
But, as nothing stops them reaching faster and faster speeds, could 
the spacecraft break the "light barrier"??
..

Re:Acceleration up to speed of light...