What is an exoplanet? An astrophysicist explains why they are vital for finding alien life

Scientists might have just found Earth's icy, distant cousin a few hundred million light-years away. HD 137010 b is one of thousands of exoplanets, or planets that orbit other stars, and is potentially the first Earth-like one that also orbits a sun-like star. Initially observed in 2017 with data from the National Aeronautics and Space Administration (NASA) and its Kepler Space Telescope, further details about HD 137010b came out this year.

This discovery adds to our understanding of planetary science and the evolution of our solar system. By studying these celestial bodies, scientists analyze geological formations, atmospheric compositions, and potential biosignatures that could indicate past or present life.

Planetary research helps us understand the formation processes that created our solar system over 4.5 billion years ago. Comparative planetology allows scientists to study how different initial conditions and evolutionary paths led to the diverse worlds we observe today, from the scorching surface of Venus to the icy moons of Jupiter.

These findings have implications for astrobiology, resource utilization, and future human exploration. Understanding planetary environments helps mission planners design appropriate spacecraft, select landing sites, and develop technologies for in-situ resource utilization that will support sustained human presence beyond Earth.