In 1999, Upsilon Andromedae became the first main-sequence star known to have multiple planets.

Gamma Trianguli represented the General itself, while 14 Trianguli and Upsilon Andromedae represented his standard-bearers.

*** Upsilon Andromedae ( with Whipple Observatory )

The primary star ( Upsilon Andromedae A ) is a yellow-white dwarf star that is somewhat younger than the Sun.

The second star in the system ( Upsilon Andromedae B ) is a red dwarf located in a wide orbit.

Upsilon Andromedae was both the first multiple-planet planetary system to be discovered around a main sequence star, and the first multiple-planet system known in a multiple star system.

Upsilon Andromedae A was ranked 21st in the list of top 100 target stars for the NASA Terrestrial Planet Finder mission, which has, however, been reported to have been cancelled as of 2011.

Upsilon Andromedae is located fairly close to the Solar System: the parallax of Upsilon Andromedae A was measured by the Hipparcos astrometry satellite as 74. 12 milliarcseconds, corresponding to a distance of 13. 49 parsecs ( 44 light years ).

Upsilon Andromedae A has an apparent magnitude of + 4. 09, making it visible to the naked eye even under moderately light-polluted skies, about 10 degrees east of the Andromeda Galaxy.

The dimmer star Upsilon Andromedae B is only visible with a telescope.

Upsilon Andromedae A is a yellow-white dwarf of spectral type F8V, similar to the Sun, but younger, more massive, and more luminous.

Upsilon Andromedae B is a red dwarf of spectral type M4. 5V located at a distance ( in the plane of the sky ) of 750 AU from the primary star.

The true separation between the two stars is unknown because the displacement along the line of sight between us and the Upsilon Andromedae stars is unknown, so this value is a minimum separation.

The Washington Double Star Catalog lists two optical components ; however, these do not share the system's proper motion and only appear close to Upsilon Andromedae because they happen to lie near the same line of sight.

The innermost planet of the Upsilon Andromedae system was discovered in 1996 and announced in January 1997, together with the planet of Tau Boötis and the innermost planet of 55 Cancri.

The planet, designated Upsilon Andromedae b, was discovered by measuring changes in the star's radial velocity induced by the planet's gravity.

Artist's conception of the planets of Upsilon Andromedae.

The two outer planets were designated Upsilon Andromedae c and Upsilon Andromedae d in order of increasing distance from the star.

* Υ υ: Greek letter Upsilon

Upsilon ( uppercase Υ, lowercase υ ;, Úpsilon ) is the 20th letter of the Greek alphabet.

* Υ υ: Greek letter Upsilon

Fischer with a keplerian fit for Upsilon Andromedae | υ And.

Upsilon Scorpii ( υ Sco, υ Scorpii ) is a star located in the " stinger " of the southern zodiac constellation of Scorpius, the scorpion.

Upsilon Sagittarii ( Upsilon Sgr, υ Sagittarii, υ Sgr ) is a spectroscopic binary star system in the constellation Sagittarius.

Upsilon Serpentis ( υ Ser, υ Serpentis ) is a star in the constellation Serpens.

Upsilon Tauri ( υ Tau, υ Tauri ) is a triple star system in the constellation Taurus and a member of the Hyades star cluster.

Upsilon Ursae Majoris ( Upsilon UMa, υ Ursae Majoris, υ UMa ) is a binary star in the constellation Ursa Major.

Upsilon Virginis ( υ Vir, υ Virginis ) is a star in the constellation Virgo.

Ptolemy included this star in Andromeda in the Almagest, but it was moved into Perseus by Johann Bayer, who designated it Upsilon Persei ( υ Per ).

And the brothers of Upsilon replied by letter in like fashion:

* November 4 – Delta Upsilon fraternity is founded at Williams College.

At Northwestern, he joined the Upsilon chapter of Phi Kappa Sigma and is listed amongst the most famous members of the fraternity.

The Pansy is a symbol of the Kappa Alpha Theta sorority, the Delta Delta Delta sorority and the Sigma Lambda Upsilon ( ΣΛΥ ) or Señoritas Latinas Unidas Sorority, Inc.

Delta Kappa Epsilon ( ΔΚΕ ; also pronounced D-K-E or " Deke ") is a fraternity founded at Yale College in 1844 by 15 men of the sophomore class part of whom hadn't been invited to join the two existing societies ( Alpha Delta Phi and Psi Upsilon ) among others who had been invited to join.

He is a member of the Delta Upsilon Fraternity and credits much of his accomplishments to his time at Keewaydin Canoe Camp for boys in Vermont.

Upsilon participated as the second element in falling diphthongs, which have subsequently developed in various ways: for instance after alpha or epsilon it is pronounced or.

Upsilon is known as Pythagoras ' letter, or the Samian letter, because Pythagoras used it as an emblem of the path of virtue or vice.

This planet is in a 3: 1 resonance with Upsilon Andromedae d.

He is a member of Psi Upsilon and received an honorary doctorate of engineering from Rensselaer Polytechnic Institute on 18 May 2002 and is a former scientist of the NASA Jet Propulsion Laboratory.

He is a member of the Institute of Electrical and Electronics Engineers, Tau Beta Pi, Sigma Xi, and Delta Upsilon.

Upsilon Pi Epsilon ( ΥΠΕ ): International Honor Society for the Computing and Information Disciplines, is the first and only existing one of its kind.