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STARS and STAR OF THE WEEK

Updated Each Friday With A New Star

Star Count: 662

Created by Jim Kaler, Prof. Emeritus of Astronomy, University of Illinois

This week's star is Mu Nor (Mu Normae).

Scroll down for the past 10 stars, Places to Go, and the complete stellar archive.

Welcome! STARS presents a comprehensive suite of pages that tell the stories of stars and their constellations. Please explore and enjoy. The stars listed below have all appeared as a Star of the Week on Skylights. The first two tables list the stars alphabetically by proper name (where available, otherwise by Greek letter name, catalogue number, or variable star designation). Stars known principally by Flamsteed number are listed in the third table. The fourth table then arranges the stars by Greek letter name within their parent constellations, which are linked to labelled photographs that show the stars' locations.

STARS now contains:

Note to readers: The temperatures of the stars are in degrees Kelvin, which are centigrade (Celsius) degrees above absolute zero, -273 degrees C (-459 degrees F). Stellar and orbital radii are commonly given in Astronomical Units, where the AU is the average distance between the Earth and Sun (technically the semi-major axis of the Earth's orbit), equal to 150 million kilometers or 93 million miles, or in solar radii, where the solar radius is 696,000 km (432,000 miles). Stellar distances are in light years, where the light year is the distance light travels in one year, equal to 63,270 AU (and 0.3066 parsecs, where the parsec equals 206,265 AU, 3.2616 light years). Unless a star is too far away, or is determined by other more precise means, its distance is taken from the Hipparcos parallax catalogue, using the second reduction after July 1, 2009, for all first magnitude stars, or where indicated in the description of the star. Unless otherwise stated, stellar luminosities are total (bolometric) luminosities that include ultraviolet and infrared radiation.

PLACES TO GO

Skylights presents the weekly sky and a photo of the week. Stars arranged by spectral class and variable star class using proper names. Stars arranged by spectral class and variable star class using Greek letter names.
The Natures of the Stars provides a linked introduction to stars and star lives. SPECTRA provides a linked and illustrated introduction to the spectra of the stars. The Hertzsprung-Russell Diagram presents the different kinds of stars and an introduction to star lives.
The Constellations presents a complete linked list along locations and brightest stars. Constellation Maps shows the locations of the constellations on six charts. Tour the Milky Way as seen from the northern hemisphere.
The 152 Brightest Stars, through magnitude 2.90. The Planet Project shows stars with orbiting planets. Visit The Planetary Nebulae, with images from the past and present.
See prominent star clusters and enjoy Poor Blue Straggler. Take a trip to the Galaxy's Anticenter, its variables and clusters. Compare with the Milky Way at the Galaxy's Center.
See a deep photo and naked-eye polar stars in the Polar Project. Look at pages from classical star atlases. Read more on stars in Stellar Stories.
See Measuring the Sky to learn about the celestial sphere. Read a brief discussion of Star Names. Know the Greek alphabet, used in naming stars.
See planets move against the background stars. Find out what happened in astronomy 1989-2008 on the Astronomy Update Pages. Skylights has an Archive and Photo Gallery back to September 25, 1998.
See sunsets, rainbows, the Moon and planets, and other sky phenomena in Sunlight. Go from Day Into Night, with 83 linked illustrations. The Aurora has an explanation and images.
See aspects of the Moon at Moon Light. Love the stars? The StarGazer may be playing in a planetarium near you. The History and Philosophy of the site.
Take a ride aboard Asteroid 17581 Kaler (1998 JK). Examine a variety of Jim Kaler's books about stars.

See SG Logo

ASPSupport science literacy by joining the Astronomical Society of the Pacific, an international organization that is among the world's premier providers of astro education. Get Mercury and a variety of other benefits; see some excerpts.


Latest on Stellar Stories: "Riding the Chariot," a tale of Auriga, the Charioteer.

Presenting three audio courses with 70-100 page study guides, narrated and written by Jim Kaler.
Heavens Above: Stars, Constellations, and the Sky from Recorded Books. Astronomy: Earth, Sky, and Planets, is available from Recorded Books. Astronomy: Stars, Galaxies, and the Universe, is also now available from Recorded Books.
Astronomy: Earth, Sky, and Planets is published as Vault of the Heavens: Exploring the Solar System's Place in the Universe by Barnes and Noble.

NEW BOOK! HEAVENS'S TOUCH: From Killer Stars to the Seeds of Life, How We Are Connected to the Universe, Princeton University Press, 2009.

Read the news about the supermassive stars in R136 and NGC 3603.

The new star, for July 30, 2010, is Mu Nor (Mu Normae), an enormously luminous blue star.

The past 12 stars were, for:

NEW CONSTELLATION PHOTO: A deep image of southern Centaurus and the Southern Cross.

ANOTHER NEW IMAGE: The Galactic Center in Sagittarius.

YET ANOTHER NEW IMAGE: Crux through Carina to Vela.

RECENT: The two Dippers with Draco.

Updates within the past year are indicated in the tables below by an asterisk (*); stars with illustrations are marked by "&," those with planets in the Planet Project by "#."

New update: Alcor (80 Ursae Majoris), with a note on its pairing with Mizar.

Recent updates: Porrima (Gamma Virginis), featuring the binary orbit, and Chara (Beta Canum Venaticorum).

NEW in the Planet Project: 61 Virginis, a star with a three-planet system that includes a "super-earth."

STARS: A-K

Acamar Achernar Achird Acrux Acubens Adhafera
Adhara AE Aur Ain # Aladfar Albaldah Albali
Albireo Alchiba Alcor* Alcyone Aldebaran Alderamin
Al Dhanab Al Dhibain "Posterior" Al Dhibain "Prior" Alfecca Meridiana Alfirk Algedi
Algenib Algenubi Algieba Algol & Algorab Alhena
Alifa al Farkadain Alioth Al Kab Alkaid Alkalurops Al Kaphrah
Alkes Almaaz & Almach Al Nair Alnasl Alnilam
Alnitak Al Niyat (Sigma) Al Niyat (Tau) Alpha Ant Alpha Aps Alpha Ara
Alpha Cae Alpha Cam Alpha Cha Alpha Cir Alpha Dor Alpha For
Alpha Hor Alpha Hyi Alpha Lac Alpha Lyn Alpha Men Alpha Mic
Alpha Mon Alpha Mus Alpha Oct Alpha Pic Alpha Pyx Alpha Ret
Alpha Scl Alpha Sct Alpha Sext Alpha Tel Alpha Tuc Alpha Vol
Alphard Alphecca (Gemma) Alpheratz Alrescha Alsafi Alsciaukat
Alshain Altais (Nodus II) Altair & Al Tarf Alterf Al Thalimain Posterior
Al Thalimain Prior Aludra Alula Australis & Alula Borealis Alya Al Zirr
Ankaa Anser Antares Anwar al Farkadain Arcturus Arkab Posterior
Arkab Prior Arneb Ascella Asellus Australis Asellus Borealis Asellus Primus
Asellus Tertius Asmidiske Aspidiske Atik Atlas Atria
Avior Azha Barnard's Star Baten Kaitos Beid Bellatrix
Beta Ara Beta Cam Beta Com Beta CrA Beta Dor & Beta Equ
Beta Gru Beta Hya Beta Hyi Beta LMi & Beta Lup Beta Mon
Beta Mus & Beta Pic # Beta PsA Beta Sct Beta TrA Beta Tri
Beta Tuc Betelgeuse* Canopus Capella & Caph Castor &
Cebalrai Celaeno Chara* Chertan Chi Aqr Chi Car
Chi Cyg Chi Eri Chi Her Chi Lup Chi Oph Chi-1 Ori &
Chi-2 Ori Cor Caroli Cursa Cygnus X-1 & Dabih Delta And
Delta Aql Delta Aur & Delta Boo Delta Cen Delta Cep Delta Cet
Delta-1 CMi Delta Crb Delta Crt Delta Cru Delta Cyg Delta Del
Delta Equ Delta-1 Gru Delta-2 Gru Delta Her Delta-1 Lyr & Delta-2 Lyr &
Delta Per Delta Sct Delta Ser Delta Sge & Delta Tri Delta Vel &
Delta Vir Delta Vol Deneb & Deneb Algedi Deneb Al Okab Aus Deneb Al Okab Bor
Deneb Dulfim Deneb Kaitos Denebola Diadem Dschubba & Dubhe
Edasich # Electra Elnath Eltanin Enif Eps And
Eps Cen Eps Cep Eps CrA Eps Cru Eps Eri # Eps Her
Eps Hya Eps Ind Eps Lyr & Eps Mon & Eps Mus Eps Per
Eps Sco Eps Ser Eps UMi Errai # Eta Aql & Eta Aqr
Eta Car Eta Cen Eta CMi Eta Crv & Eta Her Eta Leo
Eta Per Eta Sco Eta Sgr Fomalhaut &# Fum al Samakah Furud
G Sco Gacrux Gamma Ara Gamma Cas Gamma CMi Gamma CrB &
Gamma Del Gamma Dor Gamma Her Gamma Hya Gamma Hyi Gamma Lep
Gamma Lup & Gamma Mic Gamma-2 Nor Gamma Per Gamma Phe Gamma Psc
Gamma Ser Gamma Sge Gamma TrA Gamma Tri Gamma Vol Garnet Star &
Giausar Gienah Corvi Gienah Cygni Girtab Gomeisa Gorgonea Tertia
Graffias (Acrab) Grumium Hadar (Agena) & Haedus I & Haedus II & Hamal
Heze HD 20367 Ari # HD 50554 Gem # HD 188753 Cyg # HD 189733 Vul # HD 195019 Del #
HD 210277 Aqr # Hind's Crimson & Homam HR 6 Phe # HR 286 UMi & HR 306 Cep &
HR 1107 Cep & HR 1988 Ori # HR 2447 CMa # HR 2622 Mon # HR 2877 Gem # HR 3497 Vel #
HR 4067 UMa # HR 4686 UMi & HR 6094 Sco # HR 6817 Dra # HR 6907 Sgr # HR 7272 Lyr #
HR 7291 Sgr # HR 7907 Del # HR 8734 Psc # HR 8752 Cas HR 8799 Peg # HR 8938 Cep &
Hyadum I Hyadum II Hydor Iota Cas & Iota Cen Iota CMa &
Iota Cnc Iota Gem Iota Her Iota Hor # Iota Leo Iota Lep
Iota Lib & Iota Per Iota Psc Iota-1 Sco Iota-2 Sco Izar
Jabbah Kaffaljidhma Kakkab Kappa Cas Kappa-1 Cet & Kappa Cnc
Kappa CrB # Kappa Dra Kappa Oph Kappa Psc Kappa Sco Kappa Ser
Kappa Tau Kappa UMa Kaus Australis Kaus Borealis Kaus Media Keid
Kitalpha Kochab Kornephoros Kraz Kullat Nunu Kuma
Kurhah


STARS: L-Z

l Car L2 Pup La Superba Lambda And Lambda Boo Lambda Cet
Lambda Eri Lambda Tau Lambda UMi & Lesath Maia Marfak-East &
Marfak-West & Marfik Markab Markeb Marsic Masym
Matar Mebsuta Megrez Meissa Mekbuda Menkalinan
Menkar Menkent Menkib Merak Merope Mesarthim
Miaplacidus Mimosa Minkar Mintaka Mira Mirach
Mirfak Mirzam Mizar Mothallah Mu Ara # Mu Cen
Mu Cet Mu Col Mu Cru Mu Eri Mu Her Mu Nor
Mu Ori & Mu Per Mu-1 Sco Mu Vel Muhlifain Muliphein
Muliphen Muphrid Muscida Na'ir al Saif Naos & Nashira
Nekkar Nihal Nu And Nu Aqr & Nu Aur & Nu-1 Boo
Nu-2 Boo Nu Cen Nu Cep Nu CrB & Nu Eri Nu Gem
Nu Hya Nu Oct Nu Pup Nu Vir Nunki Nusakan
Omega Cap Omega CMa & Omega Eri Omega Psc Omega Vir Omicron-1 CMa
Omicron-2 CMa Omicron-1 = 31 Cyg & Omicron-2 = 32 Cyg & Omicron Tau OV Cep & P Cyg &
Peacock The Persian Phact Phecda Pherkad Phi And &
Phi Cas & Phi Sgr Phi UMa & Phi Vel Pi And & Pi Aur &
Pi Her Pi Men # Pi-4 Ori Pi-5 Ori & Pi-1 Peg Pi-2 Peg
Pi PsA Pi Pup Pi Sco & Pi-2 UMa # Plaskett's Star Pleione
Polaris & Polaris Australis Polaris Gal. Bor. Polis Pollux # Porrima*
Praecipua Procyon Propus Proxima Cen Psi Cap Psi UMa
Psi Vel q-1 Eri # R Hya & R Leo & R Lyr & R Scuti &
Rana Rasalas Rasalgethi & Rasalhague Rastaban Regor
Regulus Rho Aql Rho Boo Rho Cas Rho CrB # Rho Her
Rho Leo Rho Oph Rho Sco Rigel Rigil Kentaurus Rotanev
RR Lyrae Ruchbah & Rukbat RX Lep S = 15 Mon & Sabik
Sadachbia Sadalbari (Lambda) Sadalbari (Mu) Sadalmelik Sadalsuud Sadr &
Saif al Jabbar Saiph Scheat Seat & Segin Seginus
Sham Shaula Shedar & Sheliak Sheratan Sigma Aql
Sigma Boo Sigma CMa & Sigma CrB Sigma Gem Sigma Ori Sirius
Skat Spica Sualocin Subra & Suhail Sulafat
The Sun Syrma T Cen & Tabit Talitha Tania Australis
Tania Borealis Tarazed Tau Aur & Tau Boo # Tau Cet Tau CMa
Tau-4 Eri Tau-1 Gru # Tau Her Tau Ori Tau Per & Tau Sgr
Taygeta Tegmine & Tejat Theta Aql & Theta Aur Theta Cap
Theta Car Theta CrB Theta Dra Theta Her Theta Oph Theta-1 Ori
Theta-1 Tau & Theta-2 Tau & Theta UMa Thuban Tureis Unukalhai
Ups And # Ups Aur & Ups UMa Vega & Vindemiatrix V Pup &
VV Cep & VV Ori & W Boo W Ori Wasat Wazn
Wezen X Her & X Per & X Sgr Xi Boo & Xi-1 Cet
Xi Cyg & Xi Peg Xi Ser Xi Tau Yed Posterior Yed Prior
Yildun & YY Gem Zaniah Zaurak Zavijava Zeta Aqr
Zeta Boo Zeta Cap Zeta Cas & Zeta Cen Zeta Cep Zeta Cyg &
Zeta Her Zeta Hya Zeta Lep Zeta Lyr & Zeta Oph Zeta Per
Zeta Phe Zeta Ret Zeta-1 Sco Zeta Tau Zosma Zubenelgenubi
Zubeneschamali Zubenhakrabi


STARS: FLAMSTEED NUMBERS

1 Gem 2 Cen 2 UMi & 3 Cen 3 Vul 6 Cas 6 Tri 8 Her 9 Cet
10 Dra=CU Dra 10 Lac 10 UMa & 12 Boo & 13 Mon & 14 Aur & 14 Her # 16 Cyg # 18 Sco
19 Cep 19 Psc 21 LMi 23 Lib # 23 UMa 24 UMi & 25 Ori 29 Cyg & 30 Her &
30 Tau 31 Aql 38 Lyn 41 Ari 47 UMa # 48 Lib 48 Per 51 Peg # 53 Aqr &
53 Per & 54 Psc # 55 Cnc # 59 Cyg 61 Cyg 61 Vir # 67 Oph 70 Oph & 70 Vir #
78 UMa & 78 Vir 79 Cet # 89 Her 94 Cet # 95 Her 109 Psc # 119=CE Tau


Constellations and their Stars


LINKS

To learn more about stars, constellations, and astronomy go to:

American Association of Variable Star Observers
The Astronomical Society of the Pacific
Astronomy Picture of the Day
Chandra X-ray Observatory
The Constellations and their Stars
Earth and Sky, Skywatching
Earth and Sky, General Science
Hubble Space Telescope
MOST precision photometry satellite
Munich Astro Archiv Constellation Pages
The Mythology of the Constellations
The Night Sky Atlas
Solar and Heliospheric Observatory (SOHO)
SolStation.com
UCSD Center for Astrophysics and Space Sciences, Astronomy and Education Outreach
Universe Today-Space news from around the Internet, updated every weekday.
Windows to the Universe

SOURCES

The following sources were used to create the Stars of the Week. Thanks to the stellar researchers.

Allen, R. H., "Star Names: Their Lore and Meaning," Dover, New York, reprint, 1963
American Association of Variable Star Observers
The Astronomical Journal
The Astronomical Society of the Pacific Conference Series
Astronomy and Astrophysics: A European Journal
Astronomy and Astrophysics Abstracts, Springer, Heidelberg
Astronomy and Astrophysics Supplement Series
The Astrophysical Journal
The Astrophysical Journal Supplement Series
Becvar, A., Skalnate Pleso Atlas of the Heavens
Berry, A., "A Short History of Astronomy," Dover, New York, reprint, 1961
Terrell, D., Mukherjee, J. D., Wilson, R. E., "Binary Stars: A Pictorial Atlas," Krieger Publ., 1992
Burnham, R., Jr., Burnham's Celestial Handbook, Dover, New York, 1978
European Southern Observatory Southern Sky Survey
Hoffleit, D. and Jaschek, C., The Bright Star Catalogue, Fourth Revised Ed., Yale University Observatory, 1982
Hoffleit, D. and Warren, W. H., Jr., Yale Bright Star Catalogue, Fifth Revision, NASA ADC, 2002
The Hipparcos and Tycho Catalogues, European Space Agency, 1998
Information Bulletin on Variable Stars
Kaler, J. B., "Stars and their Spectra," Cambridge U. Press, 1989
Kaler, J. B., "Astronomy!," HarperCollins, New York, 1994
Kaler, J. B., "Extreme Stars," Cambridge U. Press, 2001
Kaler, J. B., "The Hundred Greatest Stars," Copernicus Books, New York, 2002
Kaler, J. B., "The Cambridge Encyclopedia of Stars," Cambridge U. Press, 2006
Kukarkin, B. V. et al., "General Catalogue of Variable Stars," Astr. Council Acad. Sci. USSR, Moscow, 1970
Kunitzsch, P. and Smart, T., "Short Guide to Modern Star Names/Derivations," Harrassowitz, Berlin, 1986
Monthly Notices of the Royal Astronomical Society
The Observatory
Observer's Handbook, Royal Astron. Soc. Canada, R. Bishop, ed, Toronto, U. Toronto Press
Palomar Sky Survey, Palomar Observatory/California Institute of Technology
Publications of the Astronomical Society of the Pacific
SIMBAD on the Web, CDS, University of Strasbourg
Sky and Telescope
Smyth, W. H. (rev. G. F. Chambers), "A Cycle of Celestial Objects," Clarendon, Oxford, 1881
Tirion, T., Sky Atlas 2000, Sky Publishing Corp., Cambridge, 1981
USNO Washington Double Star Catalog 2001.0, B.D. Mason, G.L.Wycoff, W.I.Hartkopf, G.G.Douglass, C.E.Worley
USNO Fifth Catalog of Orbits of Visual Binary Stars, W. I. Hartkopf, B. D. Mason, C. E. Worley
USNO Washington Double Star Catalog 2006.5, D. D. Mason, G. L. Wycoff, W. I. Hartkopf
USNO Sixth Catalog of Orbits of Visual Binary Stars, W. I. Hartkopf, B. D. Mason
van Leeuwen, F., "Hipparcos, the New Reduction of the Raw Data, Springer, 2007.
Wagman, M., "Lost Stars," McDonald and Woodward, Blacksburg, VA, 2003.

Opening star image from the European Southern Observatory Southern Sky Survey.
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