GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a high-mass star’s core collapses and its outer portion explodes, a ____ is produced.
A
supergiant
B
supernova
C
white dwarf
D
black hole
Explanation: 

Detailed explanation-1: -As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova.

Detailed explanation-2: -A Type II supernova (plural: supernovae or supernovas) results from the rapid collapse and violent explosion of a massive star. A star must have at least 8 times, but no more than 40 to 50 times, the mass of the Sun ( M ☉) to undergo this type of explosion.

Detailed explanation-3: -The core reaches its minimum size of about 10 km, but then it begins to rebound. As it does so, shock waves are driven into the stellar material that is also trying to fall in to the center. After this rebound the core will again collapse, but this time it is more or locked into place as a fully formed neutron star.

There is 1 question to complete.