Top Results for Main Sequence

Vega is a main sequence A-type star located in the constellation Lyra approximately 25 light-years from Earth. It’s notable for its bright blue-white color and historical significance as the northern pole star. Vega plays a key role in the Summer Triangle asterism and contains a surrounding debris d...

The Sun is a G-type main sequence star, our closest stellar neighbor. This yellow dwarf provides nearly all the energy that sustains life on Earth through nuclear fusion in its core. Its consistent output of light and heat makes it essential for planetary habitability and supports a vast range of bi...

51 Pegasi is a G-type main-sequence star located approximately 50 light-years from Earth within the Pegasus constellation. It gained prominence as the first host star of an exoplanet discovered orbiting a Sun-like star. The discovery by Mayor and Queloz in 1995 revolutionized planetary science and d...

Altair is a brilliant A-type main-sequence star located within the constellation Aquila. Situated just 17 light-years from Earth, it’s notable for its exceptionally fast rotation rate. This rapid spin causes a flattening of the star at its poles. Altair represents a key nearby star system and is par...

Alpha Centauri B is a K-type main-sequence star located approximately 4.37 light-years from Earth in the Alpha Centauri star system. It orbits the larger and hotter G-type star Alpha Centauri A, forming a binary pair. Together with the red dwarf Proxima Centauri, these stars make up the closest stel...

HR 8799 is a young A-type main-sequence star located approximately 129 light-years away in the constellation of Pegasus. In 2008, it achieved major astronomical significance when it became the first star system with multiple exoplanets to be directly imaged. High-resolution observations revealed fou...

Regulus, designated Alpha Leonis, is the brightest star in the northern celestial hemisphere constellation of Leo. It is a multiple-star system located roughly 79 light-years from Earth, with its primary component being a hot, blue-white main-sequence star. This primary star rotates at an exceptiona...

Beta Pictoris is a young, A-type main-sequence star located approximately 63 light-years from Earth in the constellation Pictor. It was the first star to be imaged with a surrounding circumstellar debris disk, a finding confirmed in 1984. The system is of significant interest to astronomers because...

HD 209458 is a Sun-like G-type main-sequence star located in the constellation Pegasus, approximately 159 light-years from Earth. It hosts the exoplanet HD 209458 b, which was the first exoplanet to be detected by the transit method in 1999. Additionally, the planet holds the distinction of being th...

Fomalhaut is a bright, A-type main-sequence star located about 25 light-years away in the constellation Piscis Austrinus. It is surrounded by a complex and prominent circumstellar debris disk, which was first imaged by the Hubble Space Telescope. The system is notable for hosting Fomalhaut b, an obj...

Procyon is a binary star system located in the constellation Canis Minor and is designated Alpha Canis Minoris. It is the eighth brightest star in the Earth's night sky and is situated approximately 11.5 light-years away. The primary component, Procyon A, is an F-type main-sequence star that is tran...

Merak, designated Beta Ursae Majoris, is a white main-sequence star of spectral type A1IV–V located approximately 79 light-years from the Sun in the constellation Ursa Major. It is one of the seven stars that form the Big Dipper asterism and, together with Dubhe (Alpha Ursae Majoris), serves as one...

55 Cancri, also designated Rho1 Cancri, is a binary star system approximately 41 light-years from Earth in the constellation Cancer. The primary component, 55 Cancri A, is a G-type main-sequence star slightly cooler and less massive than the Sun, while its companion, 55 Cancri B, is a red dwarf sepa...

Epsilon Eridani is a K2V main-sequence star located approximately 10.5 light-years from the Sun in the constellation Eridanus, making it one of the nearest Sun-like stars. It is younger than the Sun, with age estimates ranging roughly from 400 million to 800 million years, and exhibits significant m...

Theta1 Orionis C is the most massive and luminous member of the Trapezium cluster, a group of young stars at the centre of the Orion Nebula (M42). The primary component is an O-type star with an estimated mass of approximately 40 solar masses and a surface temperature exceeding 39,000 kelvin. It is...

Achernar, designated Alpha Eridani, is the brightest star in the constellation Eridanus and the ninth-brightest star in the night sky. Classified as a hot, blue main-sequence B-type star, it is located in the southern celestial hemisphere. Due to its exceptionally rapid rotation, Achernar is signifi...

HD 189733 is a K-type main-sequence star located approximately 64 light-years away in the constellation Vulpecula. The star hosts a hot Jupiter exoplanet, HD 189733 b, discovered in 2005, which became the first exoplanet to have its atmospheric composition directly characterized through transmission...

Kepler-22 is a G-type main-sequence star located approximately 620 light-years away in the constellation Cygnus. It is notable for hosting Kepler-22b, an exoplanet announced in 2011 as the first confirmed planet discovered by the Kepler space telescope to orbit within the habitable zone of a Sun-lik...

Kepler-442 is an orange K-type main-sequence star located approximately 1,200 light-years away in the direction of the constellation Lyra. It hosts a confirmed exoplanet, Kepler-442b, a super-Earth roughly 2.3 times the mass of Earth that orbits within the star's habitable zone. The planet was disco...

Alkaid, designated Eta Ursae Majoris, is a blue-white main-sequence star located at the tip of the handle of the Big Dipper in Ursa Major. It is approximately 104 light-years from Earth and has an apparent magnitude of around 1.86, making it one of the brightest stars in the asterism. Unlike the oth...

Shaula, designated Lambda Scorpii, is the second-brightest star in the constellation Scorpius and marks the tip of the scorpion's tail. The name derives from the Arabic for 'the raised tail.' It is a multiple-star system located approximately 570 light-years from Earth, with the primary component cl...

Kepler-62 is a K-type main-sequence star located approximately 990 light-years away in the constellation Lyra. NASA's Kepler space telescope detected five planets orbiting the star, announced in 2013, two of which (Kepler-62e and Kepler-62f) orbit within the star's habitable zone where liquid water...

Kepler-452 is a G-class main-sequence star located approximately 1,400 light-years away in the constellation Cygnus. It is notable for hosting the exoplanet Kepler-452b, which was discovered by NASA's Kepler space telescope and announced in 2015. Kepler-452b was the first near-Earth-sized planet fou...

Delta Scuti is an A-type subgiant star located in the constellation Scutum that serves as the prototype for a class of short-period pulsating variable stars. These variables undergo slight, rapid fluctuations in luminosity over periods ranging from a few minutes to a few hours due to radial and non-...

KELT-9 is a hot, rapidly rotating A-type main-sequence star located roughly 670 light-years away in the constellation Cygnus. It is highly notable for hosting KELT-9b, an ultra-hot Jupiter exoplanet that was the hottest known exoplanet at the time of its discovery. The planet's extreme dayside tempe...

Kepler-438 is a K-type star roughly 470 light-years away with Kepler-438b, a near-Earth-sized planet in the habitable zone ranked among the most Earth-like exoplanets identified by the Kepler mission.

Kepler-1649 is an M-type red dwarf star located roughly 300 light-years from Earth in the direction of the constellation Cygnus. The star is notable for hosting Kepler-1649c, an Earth-sized exoplanet that orbits within the star's habitable zone. This system gained attention in 2020 when researchers...

Tau Boötis is a binary star system in the constellation Boötes whose primary star is classified as an F-type star. Its importance in astronomy increased after the discovery announcement in 1996 of Tau Boötis b, a gas-giant exoplanet orbiting the primary at about 0.049 astronomical units and completi...

WASP-12 is a star in the constellation Auriga that hosts WASP-12b, a hot Jupiter exoplanet with an orbital period of approximately one Earth day. The planet is being tidally disrupted by gravitational forces from its host star, causing material to stream from the planet and be accreted by the star....