A Galaxy could not explode. An individual star can, and does, but a Galaxy consists of billions of stars quite widely separated.
It is impossible to say when it will explode. It seems very unstable and many astronomers think it may be soon. But soon in astronomical terms could be a million years from now, or it could happen next week.
Not yet as we don't have the technology.
Nebulas could be located in any galaxy.
The oxygen tank exploded two hours after takeoff. They could not fix it.
That sounds like a galaxy. It could also be a galaxy cluster or a supercluster.
They will not explode. It may expand and burst due to corrosion.
Yes, your appendix can explode. Once it gets infected, its starts to inflame, if left untreated it could explode and cause potentially death.
Normally connecting the cables in reverse order can cause it to explode. Overcharging can also cause the battery to rupture but it is highly unlikely it would explode.
yes
it could cause a chemical reaction and may explode
It could swell and cause your stomach to explode.
Holding it open will not cause it to explode.
The petrol holder could leak and a spark could ignite it. The hot exhaust pipe could also cause petrol to ignite.
IT COULD EXPLODE RIGHT THROUGH THE CASE.
They explode
soda could explode at any time!!!
It could maybe, if you happen to do it improperly, you would see sparks and the wire would heat up and maybe explode, but i don't think it will. :D