Definition of asthenosphere : a zone of a celestial body (such as the earth) which lies beneath the lithosphere and within which the material is believed to yield readily to persistent stresses asthenospheric
Fraser: Right. Pamela: And so any time you hear a noise in space, if you hear explosions, thatâs probably your own spacecraft, and the noise is transferring through the hull and through the air in your spacecraft. Other than that, youâre not going to hear explosions.
Answers. 1  Well, hydrogen can't explode without oxygen present: 2H2(g) + O2(g) --> 2H2O(g) However, the amount of oxygen present at the time of explosion may have an effect. With the oxygen in the balloon, the expanding gas due to the heat of the reaction probably caused a bigger noise due to the fact that the reaction took place inside the balloon.