What happened to John in melancholia?

In respect to this, can melancholia happen?

According to the path, Melancholia is moving away from the Sun across Earth's orbit. So the Sun's gravity is already out of play. What could happen on a such a close pass is that tidal forces from Melancholia could rip the Earth's crust. But anyway, anything after point two could never happen.

Secondly, what's wrong with Justine in Melancholia? Melancholy and madness are of course akin to death. Justine dies in Part Two of Melancholia, by blindness, by darkness. She is consumed. But she is reborn when she learns that the world is coming to an end.

Keeping this in consideration, is melancholia a real planet?

Later, the reason for Antares's disappearance has become public knowledge: a newly discovered rogue planet called Melancholia, which entered the Solar System from behind the Sun, was blocking the star from view. The planet has now become visible in the sky as it approaches ever closer to Earth.

What is the movie Melancholia about?

A planet hurtles toward a collision course with Earth. Two sisters, one of them trying to recover from a heavy bout of depression and a failed marriage, cope with their destiny in very different ways.