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Upsilon Andromedae (υ And ) is a star, approximately 44 light-years from Earth, and approximately 3 billion years old, two thirds the age of our Sun. Viewed from Earth, υ Andromedae is in the Andromeda Constellation, and is about 10 degrees east of the Andromeda Galaxy. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ...
2000 is a leap year starting on Saturday of the Gregorian calendar. ...
Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ...
Andromeda is a constellation named for the princess Andromeda (which is Greek for Ruler over men), a character in greek mythology. ...
Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ...
In astronomy declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ...
A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ...
The parsec (symbol pc) is a unit of length used in astronomy. ...
In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ...
The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ...
The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ...
The Pleiades star cluster A star is any massive gaseous body in outer space, just like the Sun. ...
A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ...
Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third planet outward from the Sun. ...
A sun is the star at the center of a planetary system. ...
Andromeda is a constellation named for the princess Andromeda (which is Greek for Ruler over men), a character in greek mythology. ...
A degree (or in full degree of arc), usually symbolized by the symbol °, is a measurement of plane angles, or of a location along a great circle of a sphere (such as the Earth or the celestial sphere), representing 1/360 of a full rotation. ...
This image is a Galaxy Evolution Explorer observation of the large galaxy in Andromeda, Messier 31. ...
υ Andromedae was the first main sequence star determined to have more than one extrasolar planet. So far, three planets have been discovered within the system; all three are believed to be gas giants. Hertzsprung-Russell diagram The main sequence of the Hertzsprung-Russell diagram is the curve where the majority of stars are located in this diagram. ...
Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ...
A planetary system consists of at least one star and various orbiting objects (such as asteroids, comets, moons, and planets). ...
A gas giant is a large planet that is not composed mostly of rock or other solid matter. ...
Extrasolar planets
υ Andromedae b υ Andromedae b is a gas giant that orbits extremely close to the star.
In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolas. ...
The astronomical unit (AU or au or a. ...
(This page refers to eccitricity in astrodynamics. ...
The orbital period is the time it takes a planet (or another object) to make one full orbit. ...
A day is any of several different units of time. ...
Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
The Julian day or Julian day number (JDN) is the number of SI days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar 1. ...
Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ...
Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...
RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ...
Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ...
The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ...
The cubic metre (symbol m³) is the SI derived unit of volume. ...
Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ...
The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ...
Categories: Astronomers stubs | Astronomers ...
Geoffrey Marcy atop the Astronomy Building at UC Berkeley. ...
1996 is a leap year starting on Monday of the Gregorian calendar, and was designated the International Year for the Eradication of Poverty. ...
A gas giant is a large planet that is not composed mostly of rock or other solid matter. ...
υ Andromedae c υ Andromedae c is a gas giant with twice the mass of Jupiter that orbits closer to the star than Earth is to the Sun.
In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolas. ...
The astronomical unit (AU or au or a. ...
(This page refers to eccitricity in astrodynamics. ...
The orbital period is the time it takes a planet (or another object) to make one full orbit. ...
A day is any of several different units of time. ...
Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
The Julian day or Julian day number (JDN) is the number of SI days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar 1. ...
Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ...
Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...
RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ...
Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ...
The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ...
The cubic metre (symbol m³) is the SI derived unit of volume. ...
Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ...
The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ...
Categories: Astronomers stubs | Astronomers ...
Geoffrey Marcy atop the Astronomy Building at UC Berkeley. ...
Professor Fischer showing off her pgplot prowess with a keplerian fit for υ And. ...
1999 is a common year starting on Friday of the Common Era, and was designated the International Year of Older Persons by the United Nations. ...
A gas giant is a large planet that is not composed mostly of rock or other solid matter. ...
Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...
υ Andromedae d υ Andromedae d is a large gas giant 4 times the mass of Jupiter. It has an eccentric orbit within the star's habitability zone.
In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolas. ...
The astronomical unit (AU or au or a. ...
(This page refers to eccitricity in astrodynamics. ...
The orbital period is the time it takes a planet (or another object) to make one full orbit. ...
A day is any of several different units of time. ...
Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
elements of an orbit In astronomy, an apsis (plural apsides ap-si-deez) is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system). ...
The Julian day or Julian day number (JDN) is the number of SI days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar 1. ...
Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ...
Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...
RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ...
Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ...
The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ...
The cubic metre (symbol m³) is the SI derived unit of volume. ...
Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ...
The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ...
Categories: Astronomers stubs | Astronomers ...
Geoffrey Marcy atop the Astronomy Building at UC Berkeley. ...
Professor Fischer showing off her pgplot prowess with a keplerian fit for υ And. ...
1999 is a common year starting on Friday of the Common Era, and was designated the International Year of Older Persons by the United Nations. ...
A gas giant is a large planet that is not composed mostly of rock or other solid matter. ...
The habitability zone of a star is the region surrounding it in whch temperatures are suitable for water to be liquid. ...
History of discovery The innermost planet (b) was discovered in 1996 and announced in January of 1997 by Geoffrey Marcy and R. Paul Butler, both astronomers at San Francisco State University (SFSU). Because of its closeness to the parent star, it induced a large wobble which was detected relatively easily. However, some additional wobble in the star remained unexplained, and it was suggested there might be a second planet in orbit. In the end, astronomers at both SFSU and the Harvard-Smithsonian Center for Astrophysics independently concluded that, in fact, a three-planet model best fit the data. These results were announced on April 15, 1999. Geoffrey Marcy atop the Astronomy Building at UC Berkeley. ...
Categories: Astronomers stubs | Astronomers ...
An astronomer or astrophysicist is a scientist whose area of research is astronomy or astrophysics. ...
San Francisco State University is a branch of the California State University system. ...
The Harvard-Smithsonian Center for Astrophysics (CfA) is located in Cambridge, Massachusetts. ...
The existence of further planets too small to detect has not been ruled out.
See also PSR 1257+12 (also catalogued as PSR B1257+12,PSR 1300+1240 and PSR J1300+1240) is a pulsar located 2630 light years from Earth. ...
Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ...
A planetary system consists of at least one star and various orbiting objects (such as asteroids, comets, moons, and planets). ...
The following are lists of stars with confirmed extrasolar planets. ...
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