The image of Sirius A and Sirius B taken by Hubble Space Telescope A – bigger, B – smaller white dwarf (Credit:NASA)An artist impresion of Sirius A and Sirius B, A – bigger, B – smaller white dwarf (Credit:NASA)

Discover great deals on the many top brand items available only on eBay!

Sirius

Sirius (α CMa / α Canis Majoris / Alpha Canis Majoris) is the brightest star in the nighttime sky, with a visual apparent magnitude of −1.46. It is located in the constellation Canis Major. more...

HomeHome
Accessories & CablesAccessories & Cables
AmplifiersAmplifiers
CD Players & RecordersCD Players & Recorders
Cassette DecksCassette Decks
CrossoversCrossovers
DVD Players & Recorders DVD Players & Recorders
Digital Music...Digital Music...
Digital Video Recorders, PVRDigital Video Recorders, PVR
EqualizersEqualizers
Headphones, HeadsetsHeadphones, Headsets
Home Audio MiscHome Audio Misc
Home Theater ProjectorsHome Theater Projectors
Home Theater in a Box Home Theater in a Box
KaraokeKaraoke
MiniDisc PlayersMiniDisc Players
OtherOther
PreamplifiersPreamplifiers
ProcessorsProcessors
RadiosRadios
ReceiversReceivers
Remote ControlsRemote Controls
Satellite Radio Satellite Radio
Satellite Radio AccessoriesSatellite Radio Accessories
SiriusSirius
Complete SystemsComplete Systems
Other Products & KitsOther Products & Kits
Receivers OnlyReceivers Only
XM RadioXM Radio
Satellite, Cable TVSatellite, Cable TV
Shelf, Compact SystemsShelf, Compact Systems
Speakers & SubwoofersSpeakers & Subwoofers
Televisions TVTelevisions TV
Tuners, AM/FMTuners, AM/FM
TurntablesTurntables
VCRsVCRs
Vintage ElectronicsVintage Electronics
Wholesale LotsWholesale Lots

Its name comes from the Latin sīrius, from Greek σείριος (seirios, "glowing" or "scorcher"). As the major star of the "Big Dog" constellation, it is often called the "Dog Star".

Sirius can be seen from every inhabited region of the Earth's surface and, in the Northern Hemisphere, is known as a vertex of the Winter Triangle.

At a distance of 2.6 pc or 8.57 light years (50.3 trillion miles), Sirius is also one of the nearest stars to Earth. The best time of year to view it is around January 1, when it reaches the meridian at midnight.

It is a main sequence star of spectral type A0 or A1 and has a mass about 2.4 times that of the Sun.

It is also known by the Latin name Canicula ("little dog") and as الشعرى aš-ši’rā in Arabic astronomy, from which the alternate name Aschere derives.

In Chinese culture, the star is known as 天狼星 (literially, heavenly wolf star).

Its closest large neighbour star except Sirius B is Procyon, 1.61 pc or 5.24 ly away.

In 1909, Ejnar Hertzsprung suggested that Sirius was part of the Ursa Major Moving Group; however, more recent research by Jeremy King et al. at Clemson University in 2003 questions whether that is true, since the two components of Sirius appear to be too young.

Binary system

In 1844 Friedrich Wilhelm Bessel deduced that Sirius was actually a binary star. In 1862 Alvan Graham Clark discovered the companion, which is called Sirius B, or affectionately "the Pup". The visible star is now sometimes known as Sirius A. The two stars orbit each other with a separation of about 20 AU and a period of close to 50 years.

In 1915 astronomers at the Mount Wilson Observatory determined that Sirius B was a white dwarf, the first to be discovered.

Interestingly, this means that Sirius B must have originally been by far the more massive of the two, since it has already evolved off the main sequence. Robert Hanbury Brown measured the diameter of Sirius for the first time in 1956. In 2005, using the Hubble Space Telescope, astronomers determined Sirius B to be 12,000km (7,600 miles) in diameter, with a mass that is 98% of the Sun.

History

Historically, many cultures have attached special significance to Sirius. Sirius was worshipped as Sothis in the valley of the Nile long before Rome was founded, and many ancient Egyptian temples were oriented so that light from the star could penetrate to their inner altars. The Egyptians based their calendar on the heliacal rising of Sirius, which occurred just before the annual flooding of the Nile and the Summer solstice. In Greek mythology, Orion's dog became Sirius. The Greeks also associated Sirius with the heat of summer: they called it Σείριος Seirios, often translated "the scorcher." This also explains the phrase "dog days of summer".

Read more at Wikipedia.org


[List your site here Free!]

Newly ListedPurple Diamond Inear Earbud Headphone Earphone for Mp3 Mp4 Any 3.5mm Audio JackNewly ListedPurple Diamond Inear Earbud Headphone Earphone for Mp3 Mp4 Any 3.5mm Audio Jack $6.95 Newly ListedWall Face Plate Outlet Panel Power Supply Socket Switch with Usb Female PortNewly ListedWall Face Plate Outlet Panel Power Supply Socket Switch with Usb Female Port $13.79
Buy It Now
Free shipping
Newly ListedGame Gaming Stereo Headset Headphone Earphone With Micphone for Xbox360 BlackNewly ListedGame Gaming Stereo Headset Headphone Earphone With Micphone for Xbox360 Black $46.46
Buy It Now
Free shipping
Newly ListedFor iPod Touch 5th Gen 5G Flip Wallet Pu Leather Hard Case Cover Card Pouch +PenNewly ListedFor iPod Touch 5th Gen 5G Flip Wallet Pu Leather Hard Case Cover Card Pouch +Pen $8.99
Newly ListedPhillies Officially Licensed Earphones Ipod, Iphone Ihip NibNewly ListedPhillies Officially Licensed Earphones Ipod, Iphone Ihip Nib $7.99 Newly ListedSony Cfd-S05 Portable Cd Radio Cassette Recorder Stereo w/ Line-In Jack for Mp3Newly ListedSony Cfd-S05 Portable Cd Radio Cassette Recorder Stereo w/ Line-In Jack for Mp3 $47.99
Newly ListedApple iPod classic 7th Generation (160 Gb) (Latest Model)Newly ListedApple iPod classic 7th Generation (160 Gb) (Latest Model) $165.00 Newly ListedSol Republic Master Tracks Xc Over-Ear Headphones Studio Tuned by Calvin HarrisNewly ListedSol Republic Master Tracks Xc Over-Ear Headphones Studio Tuned by Calvin Harris $168.99
Newly ListedNew Able Planet Nc1100B Clear Harmony Around-the-Ear Noise Cancelling HeadphonesNewly ListedNew Able Planet Nc1100B Clear Harmony Around-the-Ear Noise Cancelling Headphones $139.95 Newly ListedJvc Hafx8V Hafx8 Violet Riptidz In-Ear Earbud Headphone Earphone for iPhone NewNewly ListedJvc Hafx8V Hafx8 Violet Riptidz In-Ear Earbud Headphone Earphone for iPhone New $10.45
Newly ListedSony Sports Walkman Wm-Fs 191, Made in Taiwan, Perfect conditionNewly ListedSony Sports Walkman Wm-Fs 191, Made in Taiwan, Perfect condition $60.00 Newly ListedSport Stereo Earphone/Headphone for Mp3 +volume controlNewly ListedSport Stereo Earphone/Headphone for Mp3 +volume control $0.99
Newly ListedBlack portable digital Mini Speaker for mobile phone & iPod & Mp3 / Mp4 PlayerNewly ListedBlack portable digital Mini Speaker for mobile phone & iPod & Mp3 / Mp4 Player $18.80 Newly ListedHot Portable digital Mini Speaker for mobile phone & iPod & Mp3 /Mp4 Player &SdNewly ListedHot Portable digital Mini Speaker for mobile phone & iPod & Mp3 /Mp4 Player &Sd $18.93
Newly ListedSony Mdr-Zx100 Zx Series Headphones White Studio Monitor Over Ear Style & SoundNewly ListedSony Mdr-Zx100 Zx Series Headphones White Studio Monitor Over Ear Style & Sound $13.50 Newly ListedBoss Hp32 Headphone Stereo Wireless InfraredNewly ListedBoss Hp32 Headphone Stereo Wireless Infrared $37.99
Newly ListedApple iPod classic 7th Generation Black (160 Gb) (Latest Model)Newly ListedApple iPod classic 7th Generation Black (160 Gb) (Latest Model) $170.00 Newly ListedFe Stylish Design With Colorize Foldable Comfortable Headset Sca-0942Newly ListedFe Stylish Design With Colorize Foldable Comfortable Headset Sca-0942 $1.99
Newly ListedPortable Bluetooth Metal Wireless Mini Speaker HiFi Handsfree Mp3 Player Ga ENewly ListedPortable Bluetooth Metal Wireless Mini Speaker HiFi Handsfree Mp3 Player Ga E $17.93 Newly ListedAssorted Leaf Earphones Headphones Cord Wire Cable Organizer for Apple iPhone 5Newly ListedAssorted Leaf Earphones Headphones Cord Wire Cable Organizer for Apple iPhone 5 $0.97
Newly ListedSony Walkman Wm-F31, Made in Japan, NewNewly ListedSony Walkman Wm-F31, Made in Japan, New $100.00 Newly ListedMicrosoft Zune Black (120 Gb) Digital Media Player 85.73Gb availableNewly ListedMicrosoft Zune Black (120 Gb) Digital Media Player 85.73Gb available $350.00
Newly ListedNew Blue Dot Leather Wallet Case Skin Cover Pouch For Ipod Touch 4Th 4 4Gen HotNewly ListedNew Blue Dot Leather Wallet Case Skin Cover Pouch For Ipod Touch 4Th 4 4Gen Hot $3.59 Newly ListedGenuine Bose Ie2 In-Ear Headphones Earbuds Free ShippingNewly ListedGenuine Bose Ie2 In-Ear Headphones Earbuds Free Shipping $59.99
Newly ListedCar Kit Mp3 Player Wireless Fm Transmitter Modulator Usb Sd Mmc Lcd With RemoteNewly ListedCar Kit Mp3 Player Wireless Fm Transmitter Modulator Usb Sd Mmc Lcd With Remote $8.84 Newly Listed$100 iTunes E-Gift card Will Message . Fast delivery!Newly Listed$100 iTunes E-Gift card Will Message . Fast delivery! $75.00
Newly Listed2M long usb data sync cable charger adapter for Apple iPhone 4 4S iPod NanoNewly Listed2M long usb data sync cable charger adapter for Apple iPhone 4 4S iPod Nano $4.99 Newly ListedHeadphones Monster Dna on-earNewly ListedHeadphones Monster Dna on-ear $108.00
Newly ListedUrbanears Zinken On-Ear Headphones - Assorted ColorsNewly ListedUrbanears Zinken On-Ear Headphones - Assorted Colors $68.99 Newly ListedApple iPod classic 5th Generation (30 Gb)Newly ListedApple iPod classic 5th Generation (30 Gb) $9.99
Newly ListediWatchz Q Collection Wrist Strap Watch Band for iPod nano 6th whiteNewly ListediWatchz Q Collection Wrist Strap Watch Band for iPod nano 6th white $9.99 Newly ListedNew Griffin PowerBlock Ac Charger for iPod / Usb Devices - WhiteNewly ListedNew Griffin PowerBlock Ac Charger for iPod / Usb Devices - White $2.78
Newly ListedBeats by Dr. Dre Solo Headband Headphones - PinkNewly ListedBeats by Dr. Dre Solo Headband Headphones - Pink $110.00 Newly ListedRadio Degen 1103 Am/Fm/ShortwaveNewly ListedRadio Degen 1103 Am/Fm/Shortwave $39.00
Newly ListedStratus 5 Sv5 Sirius Satellite Radio Receiver (Car Adaptor/Antenna Included)Newly ListedStratus 5 Sv5 Sirius Satellite Radio Receiver (Car Adaptor/Antenna Included) $14.99 Newly ListedLovely Hello Kitty Hard Back Skin Cover Case For iPod Touch 4 4G 4th Hk11Newly ListedLovely Hello Kitty Hard Back Skin Cover Case For iPod Touch 4 4G 4th Hk11 $0.01
Newly ListedBluetooth Speaker Handfree Car Kit Speaker phone Portable for CellphoneNewly ListedBluetooth Speaker Handfree Car Kit Speaker phone Portable for Cellphone $8.99 Newly ListedNew Audio-Technica Ear Suit aluminum housing headphone Ath-Es88 F/S From JapanNewly ListedNew Audio-Technica Ear Suit aluminum housing headphone Ath-Es88 F/S From Japan $161.60
Newly ListedSoul Sl300 Wb Headband Headphones - Black/White in Great ConditionNewly ListedSoul Sl300 Wb Headband Headphones - Black/White in Great Condition $64.95 Newly ListedUniversal 3.5mm Jack Wireless Lcd Fm Radio Transmitter for iPhone iPod SilverNewly ListedUniversal 3.5mm Jack Wireless Lcd Fm Radio Transmitter for iPhone iPod Silver $17.51
Buy It Now
Free shipping
Newly ListedLunaTik Lynk Aluminum Multi-Touch Watch Band for iPod Nano 6th generation blackNewly ListedLunaTik Lynk Aluminum Multi-Touch Watch Band for iPod Nano 6th generation black $16.88 Newly ListedSport Headphone Headset Earphone mp3 Player Lcd Screen Fm Radio Tf CardNewly ListedSport Headphone Headset Earphone mp3 Player Lcd Screen Fm Radio Tf Card $25.68
Buy It Now
Free shipping
Newly ListedMonster Beats by Dr Dre Solo Headphones Box Only- WhiteNewly ListedMonster Beats by Dr Dre Solo Headphones Box Only- White $30.00 Newly ListedSol Republic Motorola Deck Wireless Speaker Bluetooth Boom Box iPod Iphone NanoNewly ListedSol Republic Motorola Deck Wireless Speaker Bluetooth Boom Box iPod Iphone Nano $139.00
Newly ListedAtdec Spacedec Acrobat Articulated Arm Desk Mount 20 lb Black Sd-At-Dk-BkNewly ListedAtdec Spacedec Acrobat Articulated Arm Desk Mount 20 lb Black Sd-At-Dk-Bk $158.99
Click to see more Sirius items at ebay.com
Prices current as of last update, 04/22/14 6:40am.

See also...
Complete Systems, Sirius, Satellite Radio
Other Products & Kits, Sirius, Satellite Radio
Receivers Only, Sirius, Satellite Radio

Home Contact Resources Exchange Links ebay