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Host star: TRAPPIST-1, Method of discovery: Transit Photometry, Key characteristics: One of seven Earth-sized exoplanets in the system, lies within the habitable zone.

Host star: Beta Pictoris, Method of discovery: Direct Imaging, Key characteristics: Young, massive gas giant with a high temperature, orbits relatively far from its star.

Host star: Kepler-22, Method of discovery: Transit Method, Key characteristics: Located in the habitable zone of its star, potentially has properties similar to Earth.

Host star: HR 8799, Method of discovery: Direct Imaging, Key characteristics: Young gas giant with complex weather patterns, part of a system with multiple imaged exoplanets.

Host star: Kepler-452, Method of discovery: Transit Method, Key characteristics: Known as 'Earth's cousin', older and larger than Earth, orbits in the habitable zone.

Host star: Kepler-62, Method of discovery: Transit Method, Key characteristics: Located in the habitable zone and may have a rocky composition, part of a five-planet system.

Host star: HD 100546, Method of discovery: Direct Imaging, Key characteristics: Protoplanet still forming, large circumstellar disk observed.

Host star: Kepler-186, Method of discovery: Transit Method, Key characteristics: First Earth-sized planet discovered in the habitable zone of its star, may have liquid water on its surface.

Host star: 51 Pegasi, Method of discovery: Doppler Spectroscopy, Key characteristics: First exoplanet discovered around a sun-like star, has a close-in orbit.

Host star: GJ 436, Method of discovery: Transit Method and Radial Velocity, Key characteristics: Neptune-sized exoplanet with a comet-like tail, due to its atmosphere evaporating away.

Host star: Fomalhaut, Method of discovery: Direct Imaging, Key characteristics: Once thought to be a planet, recent evidence suggests it may be a cloud of dust from two icy bodies that collided.

Host star: LHS 1140, Method of discovery: Transit Method, Key characteristics: Rocky exoplanet located in the habitable zone, larger and more massive than Earth.

Host star: HD 209458, Method of discovery: Transit Method, Key characteristics: First exoplanet detected transiting its star, gas giant with a short period orbit.

Host star: CoRoT-7, Method of discovery: Transit Method, Key characteristics: Rock-composition exoplanet, one of the first terrestrial planets with measured size and mass outside our solar system.

Host star: Kepler-438, Method of discovery: Transit Method, Key characteristics: Similar to Earth in size and temperature, potentially habitable but star flares may pose a threat to surface life.

Host star: Kepler-10, Method of discovery: Transit Method and Radial Velocity, Key characteristics: Known for its high density and rocky composition, it has no atmosphere due to close proximity to its star.

Host star: 55 Cancri A, Method of discovery: Transit Method, Key characteristics: Super-Earth, tidally locked with extreme temperature differences, may have a diamond-rich composition.

Host star: Proxima Centauri, Method of discovery: Radial Velocity Method, Key characteristics: Earth-sized exoplanet in the habitable zone, closest exoplanet to our solar system.

Host star: Gliese 581, Method of discovery: Radial Velocity Method, Key characteristics: Potentially lies in the habitable zone, high probability of being rocky.

Host star: WASP-12, Method of discovery: Transit Photometry, Key characteristics: Extremely hot, inflated gas giant that is being consumed by its host star.

Host star: K2-18, Method of discovery: Transit Method, Key characteristics: Found to have water vapor in its atmosphere, located in the habitable zone.

Host star: GJ 1214, Method of discovery: Transit Method, Key characteristics: Waterworld with a thick, steamy atmosphere; mini-Neptune or Super-Earth type.

Host star: WASP-17, Method of discovery: Transit Photometry, Key characteristics: Very low density, retrograde orbit, large radius suggesting it's a puffy giant.

Host star: TOI-700, Method of discovery: Transit Photometry, Key characteristics: Earth-sized and in the habitable zone, one of a few potentially habitable planets discovered by TESS.