What is the significance of the discovery of the exoplanet with a day that lasts less than 24 hours?

The discovery of an exoplanet with a day that lasts less than 24 hours is significant because it challenges the conventional wisdom that a planet's rotation should slow down over time due to tidal forces from its star. The exoplanet, named NGTS-10b, orbits a star about 1,000 light-years away from Earth and completes one full rotation in just 18 hours.

NGTS-10b was discovered by astronomers using the Next-Generation Transit Survey (NGTS) in Chile, which uses an array of ground-based telescopes to search for exoplanets. The discovery of NGTS-10b not only expands our understanding of planetary formation and evolution, but it also opens up new possibilities for finding other short-day exoplanets that may have been missed by previous surveys.

In addition, the discovery of NGTS-10b highlights the importance of continued investment in space exploration and technology, as it requires advanced telescopes and data analysis techniques to detect and study exoplanets. The study of exoplanets is a rapidly growing field that has the potential to answer some of the most fundamental questions about the origins and evolution of our universe.