Krypton

Krypton is one of Earth's brothers that once died.

Bio
Krypton is a fictional planet appearing in American comic books, like Superman published by DC Comics. The planet is the native world of Superman and is named after the element Krypton. The planet was created by Jerry Siegel and Joe Shuster, and was first referred to in Action Comics #1. He is a big fan of Superman comics and movies, cause he's where Superman is from.

Personality
He's nice once you get to know him.

Death
One fateful day, around 3.8 billion years ago, Krypton's core became unstable due to his inhabitants injecting crystals into his surface. It collapsed, causing the death of Krypton and many inhabitants. All the debris from the explosion either impacted the sun or left the solar system entirely.