Recent discoveries show how different, bizarre, and mysterious exoplanets really are

BY YAHYA KARIM

Exoplanets—planets orbiting stars outside our solar system—continue to reveal incredible diversity and challenge our understanding of planetary formation and survival. Some planets are just forming, such as those around the star V960 Mon. Here, astronomers using advanced telescopes observed clumps of gas being made into planet-like shapes, marking the early stages of planetary birth. This discovery provides a unique view into how giant planets come into existence.

Around the star PDS 70, researchers spotted something even rarer: sibling planets in the same orbit. One planet, roughly the size of Jupiter, orbits the star, while behind it there is a large cloud of gas and dust that may be forming into another planet. These “trojan planets” are rare and offer new information into planetary systems that form in close coordination.

Some exoplanets defy expectations. For example, the exoplanet LTT9779 b reflects an astonishing 80% of its star’s light, making it the most reflective planet ever discovered. It is extremely reflective nature comes from metallic clouds composed of glass, like silicates and titanate particles. What’s puzzling is how the planet still maintains its atmosphere, given its close proximity to its star. Similarly, the exoplanet Halla, which orbits a dying star in the red giant phase, should have been destroyed, but it still survives. This “zombie planet” suggests it may have formed after the star shrank or survived an unusual stellar event.

Extreme environments are also possible for exoplanets. GJ 1214b, located just forty light-years from earth, is covered in thick clouds of steam, hinting that it may have significant amounts of water. On the other hand, TRAPPIST-1b, which orbits a red dwarf star, has no atmosphere and reaches temperatures as high as 450°F, making it uninhabitable.

Even stranger, the exoplanet KELT-9b is hotter than some stars, with surface temperatures reaching 7,800°F. Its immense heat causes hydrogen molecules in its atmosphere to break apart. Meanwhile, WASP-121b, located about nine hundred light-years away, is stretched into a football shape due to the great gravitational pull from its nearby star.

These discoveries just show how different, bizarre, and mysterious exoplanets really are. Each planet shows its properties, and how it is unique. All this information will further help us understand how to develop our knowledge about space, and maybe even help us in our future journeys in space.