The number of planets in our solar system used to be limited to only eight, excluding Pluto. These include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, often remembered by the phrase “My cultured mother served us nachos.” However, with the discovery of exoplanets since 1992, the list has expanded dramatically. These exoplanets, such as PSR B1257+12 b and 51 Pegasus b, have added to the existing planets, making it challenging for students to remember them all.
Scientists have observed a pattern among exoplanets concerning their masses, distances from their stars, compositions, and other factors. Interestingly, there are very few planets with masses similar to Earth and Jupiter orbiting very close to their stars, with less than 5% of Earth’s distance from the Sun.
Research indicates that the scarcity of what they call “Hot Neptunes” might be due to the evolution of large planets. As gas giants grow, they either become comparable in size to Jupiter or lose their outer gas layers, leaving behind a rocky core like Earth’s size. Furthermore, astronomers have recently discovered new exoplanets, TOI-2374 b and TOI-3071 b, in what they refer to as Neptune’s desert.
These exoplanets stand out due to their proximity to their stars, with TOI-2374 b having a mass 56 times that of Earth and TOI-3071 b being 68 times the Earth’s mass. Despite their extreme surface temperatures, the exoplanets have not evaporated, possibly due to their high metal contents.
The observations of these exoplanets provide valuable insights for future research and exploration, potentially shedding light on unexplored phenomena in Neptune’s desert.
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Source: sciworthy.com
