The universe is full of surprises, and sometimes even the most diligent astronomers are left astounded. In this article, we will explore ten of the strangest planets that exist, despite defying conventional scientific understanding.

Firstly, we have the HD 209458 b, also known as Osiris. This gas giant orbits its star so closely that its atmosphere is evaporating into space, creating an enormous comet-like tail. Next up is HAT-P-1, a gas giant nearly twice the size of Jupiter, but with a density so low that it could potentially float on water.

Moving on, we have PSR B1257+12 b, a planet formed from the remnants of a supernova explosion, making it one of the oldest known planets.

Then there's Gliese 436 b, a planet made mostly of ice, but instead of freezing solid, it remains in a hot, dense state. Similarly, WASP-12b is a gas giant that is so close to its star that it is being stretched into an egg shape by tidal forces.

Continuing our journey, we encounter WASP-17b, a gas giant with a backward orbit that challenges the standard understanding of planet formation. Kepler-10b is another puzzling planet as it orbits its star in less than a day and has a rocky composition, which was previously thought to be impossible.

Intriguingly, scientists have also discovered a planet made entirely of diamond, known as PSR J1719-1438 b. Additionally, we have a planet called TrEs-2b, also called "The Dark Knight," because it reflects less than 1% of the light that reaches its surface.

Lastly, we have the planet OGLE-2005-BLG-390Lb, located 20,000 light-years away. It is considered the most distant planet known and is estimated to be approximately five times the mass of Earth.

These ten planets challenge our understanding of how planets form and behave. Their existence serves as a reminder that the universe is full of limitless wonders waiting to be discovered.