Doppler spectroscopy is the most widely used method for detecting exoplanets. It involves measuring the slight variations in the radial velocity of a star caused by the gravitational pull of an orbiting planet.

The habitable zone is the region around a star where the temperature is suitable for liquid water to exist on the surface of a planet. It is also known as the Goldilocks zone.

Gas giants are the most common type of exoplanet discovered to date. They are planets that are composed primarily of hydrogen and helium, and they are much larger than Earth.

The discovery of exoplanets has had a profound impact on astronomy. It has provided evidence for the existence of life beyond Earth, helped us understand the formation and evolution of planetary systems, and allowed us to study the properties of stars in greater detail.

51 Pegasi b was the first exoplanet discovered orbiting a sun-like star. It was discovered in 1995 by Michel Mayor and Didier Queloz.

Kepler-452b was the first exoplanet discovered in the habitable zone of a star. It was discovered in 2015 by the Kepler space telescope.

Kepler-10b was the first exoplanet discovered with a rocky surface. It was discovered in 2011 by the Kepler space telescope.

HD 209458 b was the first exoplanet discovered with an atmosphere. It was discovered in 2003 by the Hubble Space Telescope.

WASP-12b was the first exoplanet discovered with water vapor in its atmosphere. It was discovered in 2010 by the Hubble Space Telescope.

HD 189733 b was the first exoplanet discovered with clouds in its atmosphere. It was discovered in 2008 by the Hubble Space Telescope.

J1407b was the first exoplanet discovered with a ring system. It was discovered in 2012 by the Kepler space telescope.

Kepler-1625b was the first exoplanet discovered with a moon. It was discovered in 2017 by the Kepler space telescope.

GJ 1214 b was the first exoplanet discovered with a subsurface ocean. It was discovered in 2009 by the Hubble Space Telescope.

HD 189733 b was the first exoplanet discovered with a magnetic field. It was discovered in 2007 by the Hubble Space Telescope.

K2-141b was the first exoplanet discovered with a volcanic eruption. It was discovered in 2017 by the Kepler space telescope.