Astronomers have found a planet around a red giant star that should have been destroyed, yet it still exists, leaving astronomers to wonder why the planet is still there. So what’s the puzzle?

Astronomers have found a planet around a red giant star that should have been destroyed, yet it still exists, leaving astronomers to wonder why the planet is still there. So what’s the puzzle?
Proxima Centauri-b is the closest exoplanet to Earth and lies within the habitable zone of its star. And not only that, but it’s in the habitable zone!
Astronomers estimate there are more planets in our galaxy than there are stars. Just how many is that?
Do you know that we have interesting class of exoplanets? This type of planets do not have a home sun. These rogue worlds travel the distance between the stars, they live in the cold, dark interstellar regions of the galaxy. More with @DeepAstronomy