Astronomers Discover 27 Potential Binary-Star Planets

Astronomers have identified 27 candidate planets that may orbit two stars, a configuration known as a circumbinary system. Such planets are often called “Tatooine-like” planets because they circle a pair of stars, similar to the fictional planet Tatooine in the Star Wars series.

Circumbinary Planets

Circumbinary planets are exoplanets that revolve around two stars instead of one. The first confirmed circumbinary planet was Kepler-16b, announced in 2011 by the Kepler Space Telescope mission.

Binary Star Systems

A binary star system contains two stars bound by gravity and orbiting a common centre of mass. Binary systems are common in the Milky Way, and many stellar systems in the galaxy contain two or more stars.

Detection and Study of Exoplanets

Exoplanets are planets outside the Solar System. Astronomers detect them through methods such as the transit method, radial velocity method, direct imaging, and gravitational microlensing.

Important Facts for Exams

• Kepler-16b was the first confirmed circumbinary planet and was announced in 2011.
• The transit method detects a planet when it passes in front of its host star and causes a temporary dip in brightness.
• Binary star systems contain two stars that orbit a shared centre of mass.
• Exoplanets are also called extrasolar planets because they lie outside the Solar System.

Circumbinary planets are a recognised class of exoplanets in modern astronomy. The Milky Way contains billions of stars, and many of them belong to multiple-star systems.