Planets are numerous in our galaxy

Our galaxy, the Milky Way, contains at least several hundred billion planets. This estimate highlights the vast number of planetary systems that exist beyond our own solar system.

Confirmed exoplanets are relatively few

Since 1995, only more than 6,000 planets outside our solar system have been confirmed. This number represents a small fraction of the total estimated planets, showing that many more remain undiscovered.

Exoplanets vary widely in type

The population of exoplanets includes a wide range of types, from hot Jupiters—gas giants orbiting very close to their stars and subjected to intense heat—to super-Earths, rocky planets that may have conditions suitable for life.

Planet formation remains a mystery

Despite advances in astronomy, the process by which planets form is still not fully understood. Recent discoveries, such as the young planets PDS 370 and HD 169142 b, offer clues about the early stages of planetary development.

Young planets form in protoplanetary disks

These young planets are found in protoplanetary disks, massive rings of gas and dust that surround young stars. These disks are the birthplaces of planets, where material gradually comes together to form new worlds.