why The Gamma Ray Burst doesn't explode into all the directions?

arabianights

instead of the bipolar explosion

Drakkith

We don't know yet. This article outlines some of the current models though, so have a look.
http://en.wikipedia.org/wiki/Gamma-r...ion_mechanisms

phinds

It's an effect of the magnetic field of a rapidly rotating black hole forming. Look it up on Google for details

phinds

Son of a gun. I thought it WAS known to be an effect of a magnetic filed. Well, live and learn.

twofish-quant

Also the reason that we think that gamma ray bursts are beamed is that if they weren't beamed then we are talking about some totally horrendous explosion that is more 1000 times powerful than anything we've seen. If it's beamed, then it's still a massive boom, but the level of energy is comparable to explosions that we know about (i.e. supernova).

Chronos

One of the biggest mysteries about GRB's is the energy release rivals that of an anti-matter/matter explosion at their putative distances, which appears unlikely. Hence, the beamed idea ... IOW, what twofish said.