Two naive questions about gravitational waves

My understanding of GW is that they ripple the fabric of the space-time just as accelerating charged particle emits electromagnetic radiation, accelerating massive objects produce gravitational radiation in the form of gravitational waves.

The observed waves was produced from collision of two black holes which then merged to a spinning more massive black hole.

Question 1 : How do gravitational waves escape from black holes even if the light can not? For a logical explanation I assume GW do not come from inside of a black hole and they are emitted as the space-time is distorted with mass.

Question 2 : Suppose a hypothetical single, non-spinning star. Does such a star produce GW?

• the first question seems naive , but it is not trivial even the BHs collide at both $\frac c 2$ ... It will be interesting to compare the answers to the others on the BHs. – user46925 Feb 13 '16 at 15:38
• I know the new discovery is exciting, but it's best to do a little research on your own before posing a question in haste. If you just read the wikipedia on gravitational waves I believe it will answer at least your second question - of which the answer is no. The answer to the first question I believe involves the event horizon. Space is warped outside the event horizon from which energy can escape - including gravitational energy. – docscience Feb 13 '16 at 16:58