The instability strip is the region of the H-R diagram in which ...

[MirandaLo]

The instability strip is the region of the H-R diagram in which stars are stable to pulsation.
 
  Indicate whether the statement is true or false

Question 2

In the context of Einstein's general theory of relativity, briefly explain Schwarzschild black holes.
 
  What will be an ideal response?

[micaelaswann]

Answer to Question 1

False

Answer to Question 2

Albert Einstein's general theory of relativity treats space and time as a single entity-space-time. His equations showed that gravity could be described as a curvature of space-time, and almost immediately astronomer Karl Schwarzschild found a way to solve the equations to describe the gravitational field around a single, nonrotating, electrically neutral lump of matter. That solution contained the first general relativistic description of a black hole, and nonrotating, electrically neutral black holes are now known as Schwarzschild black holes.Schwarzschild's solution shows that if matter is packed into a small enough volume, then space-time curves back on itself. Objects can still follow paths that lead into the black hole, but no path leads out, so nothing can escape, not even light. Consequently, the inside of the black hole is totally beyond the view of an outside observer. The event horizon is the boundary between the isolated volume of space-time and the rest of the Universe, and the radius of the event horizon is called the Schwarzschild radius, RS-the radius within which an object must shrink to become a black hole.

[MirandaLo]

TYSM

[amcvicar]

Great answer, keep it coming