J. V. Seidel

Planet HIP 67522 b is quite young: it's only 17 million years old, compared to Earth's 4.5 billion. It's a hot Jupiter — a gas giant that orbits very close to its star, so its atmosphere is heated and puffed up.

A quiet flute melody gets lost in the roar of drums. That's what astronomers face when trying to catch the faint light that has passed through a distant planet's atmosphere while its star blazes nearby. A team of scientists observed WASP-31 b — a hot Jupiter, a gas giant orbiting very close to its star.

Light from a distant star seeps through a planet's gaseous envelope, and astronomers try to guess what that envelope is made of. That's how we study the atmospheres of worlds we can never touch. When a planet passes in front of its sun's disk, its gaseous veil briefly intercepts some of the rays.