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!]

New listing
		Sony Mdr-Ex15Ap Stereo Headphones "Black" #4New listing Sony Mdr-Ex15Ap Stereo Headphones "Black" #4 $6.99 New listing
		Toshiba Kt-S3 Metal Stereo Cassette Player Tuner Pack Rp-S2 with Carrying CaseNew listing Toshiba Kt-S3 Metal Stereo Cassette Player Tuner Pack Rp-S2 with Carrying Case $15.00
New listing
		Mini Portable Bluetooth Speaker My530Bt Fm micro memory card Usb Lights PurpleNew listing Mini Portable Bluetooth Speaker My530Bt Fm micro memory card Usb Lights Purple $17.99 New listing
		The House of Marley Chant Midnight Bluetooth Em-Ja004-Mi speakerNew listing The House of Marley Chant Midnight Bluetooth Em-Ja004-Mi speaker $69.99
New listing
		New Officiak Yamaha Pdx-B11 (H) Pdx series portable speaker Bluetooth gray JapanNew listing New Officiak Yamaha Pdx-B11 (H) Pdx series portable speaker Bluetooth gray Japan $99.00 New listing
		Beats by Dr. Dre Studio 2.0 Headphones | Drenched in BlackNew listing Beats by Dr. Dre Studio 2.0 Headphones | Drenched in Black $9.99
New listing
		Wonder women ipod 4th generation caseNew listing Wonder women ipod 4th generation case New listing
		Vintage Sony Wm-Fx20 Walkman Am/Fm Radio Cassette Tape Player W/ HeadphonesNew listing Vintage Sony Wm-Fx20 Walkman Am/Fm Radio Cassette Tape Player W/ Headphones $15.00
New listing
		Beats by Dr. Dre Solo Hd Headband Headphones - White - W/ AccessoriesNew listing Beats by Dr. Dre Solo Hd Headband Headphones - White - W/ Accessories $89.99 New listing
		Philips Shs3800/98 Earclip Stereo Headphones for iPod iPhone White/Black/MagentaNew listing Philips Shs3800/98 Earclip Stereo Headphones for iPod iPhone White/Black/Magenta $17.99
New listing
		Vintage Sony Discman D-T24 Portable Cd Player Dt24New listing Vintage Sony Discman D-T24 Portable Cd Player Dt24 $29.99 New listing
		4X 4Ft 3.5Mm Aux Replacement Cable Black +Control Talk Atrix Nitro Vivid Evo Z10New listing 4X 4Ft 3.5Mm Aux Replacement Cable Black +Control Talk Atrix Nitro Vivid Evo Z10 $19.99
New listing
		Shure Se535 In-Ear only Headphones - ClearNew listing Shure Se535 In-Ear only Headphones - Clear $350.00 New listing
		New! Genuine Lg Tone Ultra Hbs800 Black Wireless Bluetooth Stereo HeadsetNew listing New! Genuine Lg Tone Ultra Hbs800 Black Wireless Bluetooth Stereo Headset $44.99
New listing
		Grain Audio Pws.01 Solid Walnut Wood Cased Bluetooth Wireless Speaker System NewNew listing Grain Audio Pws.01 Solid Walnut Wood Cased Bluetooth Wireless Speaker System New $125.00 New listing
		Bose Ie2 In-Ear Headphones, please read, sound out of one side OnlyNew listing Bose Ie2 In-Ear Headphones, please read, sound out of one side Only $4.99
New listing
		Monster iSport Immersion w/ Apple ControlTalk In-Ear only Headphones - BlackNew listing Monster iSport Immersion w/ Apple ControlTalk In-Ear only Headphones - Black $19.00 New listing
		Bose - Sie2i Sport Earbud Headphones - Blue As Is, See DescriptionNew listing Bose - Sie2i Sport Earbud Headphones - Blue As Is, See Description $0.99
New listing
		Wooden Amplifier box for Iphone 5 / 5s / 5c Iphone Amplifer Dock Speaker WoodNew listing Wooden Amplifier box for Iphone 5 / 5s / 5c Iphone Amplifer Dock Speaker Wood $19.89 New listing
		Bose SoundDock Series Ii Digital Music System with RemoteNew listing Bose SoundDock Series Ii Digital Music System with Remote $69.99
New listing
		Philips (Bt2500B/37) Black -Wireless -Bluetooth -Rechargeable - Wireless SpeakerNew listing Philips (Bt2500B/37) Black -Wireless -Bluetooth -Rechargeable - Wireless Speaker $0.99 New listing
		Real Wood Noise Cancelling Headphones Great Sound/Look Fast Us Shipping !New listing Real Wood Noise Cancelling Headphones Great Sound/Look Fast Us Shipping ! $19.88
New listing
		ipod nano generation 2 silver model:a1199New listing ipod nano generation 2 silver model:a1199 $14.00 New listing
		Apple iPod Nano - 2nd Generation A1199 - 2GbNew listing Apple iPod Nano - 2nd Generation A1199 - 2Gb $0.99
New listing
		Radioshack 1/8" (3.5mm) Stereo Audio Cable 3ft Orange,Braided Mesh Cover,4201248New listing Radioshack 1/8" (3.5mm) Stereo Audio Cable 3ft Orange,Braided Mesh Cover,4201248 $5.77 New listing
		Jbl by Harman - Clip - Black - Rechargeable - Wireless - Portable Speaker - NewNew listing Jbl by Harman - Clip - Black - Rechargeable - Wireless - Portable Speaker - New $0.99
New listing
		New Audio-Technica QuietPoint Active Noise-Cancelling Headphones Ath-Anc27New listing New Audio-Technica QuietPoint Active Noise-Cancelling Headphones Ath-Anc27 $65.92 New listing
		Wholesale Lot Of 25 Cases Covers Skins For Apple Ipod Touch 4New listing Wholesale Lot Of 25 Cases Covers Skins For Apple Ipod Touch 4 $19.44
New listing
		Jazz Slim Shell Case with Belt Clip + Screen Protector for iPod Nano 7 (Purple)New listing Jazz Slim Shell Case with Belt Clip + Screen Protector for iPod Nano 7 (Purple) $7.95 New listing
		Sony Walkman Cd Player Esp Max D-E220 SilverNew listing Sony Walkman Cd Player Esp Max D-E220 Silver $23.99
New listing
		Wholesale Bulk Lot Of 100 Cases Covers Skins For Apple Ipod Touch 5New listing Wholesale Bulk Lot Of 100 Cases Covers Skins For Apple Ipod Touch 5 $86.22 New listing
		Philips (Bt2500B/37) Black - Wireless - Bluetooth - Portable Speaker - NewNew listing Philips (Bt2500B/37) Black - Wireless - Bluetooth - Portable Speaker - New $0.99
New listing
		Apple Ipod Classic 3rd Generation 15Gb Dock Connector (looks good - works fine)New listing Apple Ipod Classic 3rd Generation 15Gb Dock Connector (looks good - works fine) $27.77 New listing
		Apple iPod nano 2nd Generation Black (8 Gb)New listing Apple iPod nano 2nd Generation Black (8 Gb) $59.99
New listing
		Brand New Factory Sealed Vsonic Vsd2 In-Ear Headphones Black IemNew listing Brand New Factory Sealed Vsonic Vsd2 In-Ear Headphones Black Iem $45.00 New listing
		Hangtime Wireless Speaker "New"New listing Hangtime Wireless Speaker "New" $14.99
$19.99 New listing
		Beats By Dre Studio 2.0 WirelessNew listing Beats By Dre Studio 2.0 Wireless $230.00
New listing
		Harman Kardon Ni Precision Noise Isolating Headphones Apple In-Line Remote (Nib)New listing Harman Kardon Ni Precision Noise Isolating Headphones Apple In-Line Remote (Nib) $30.00 New listing
		iPod 4 protective 2 piece caseNew listing iPod 4 protective 2 piece case $4.23
New listing
		3.5mm Black Headphone Earphone Headset Stereo For iPhone iPod Mp3/4 Pc TabletNew listing 3.5mm Black Headphone Earphone Headset Stereo For iPhone iPod Mp3/4 Pc Tablet $7.88 New listing
		Apple iPod Touch - 4th Gen. (Md058Ll/A) 32 Gb - White - Digital Media PlayerNew listing Apple iPod Touch - 4th Gen. (Md058Ll/A) 32 Gb - White - Digital Media Player $0.99
New listing
		Authentic Beats by Dr. Dre Solo2 Headband On-Ear HeadphonesNew listing Authentic Beats by Dr. Dre Solo2 Headband On-Ear Headphones $95.00 New listing
		Sony Discman Esp2 Steadysound Avls Cd Compact Player D-E451 GrooveNew listing Sony Discman Esp2 Steadysound Avls Cd Compact Player D-E451 Groove $10.94
New listing
		Bowers & Wilkins P5 headphonesNew listing Bowers & Wilkins P5 headphones $125.99 New listing
		Scosche - TuneFreq Digital Fm Transmitter for Apple iPod -New - Model # IufmdNew listing Scosche - TuneFreq Digital Fm Transmitter for Apple iPod -New - Model # Iufmd $9.99
New listing
		Harman/Kardon Nc Active Noise Cancelling Over Ear HeadphonesNew listing Harman/Kardon Nc Active Noise Cancelling Over Ear Headphones $150.00 New listing
		Bose Ie2 In-Ear Headphones + case, and medium and large StayHear tipsNew listing Bose Ie2 In-Ear Headphones + case, and medium and large StayHear tips $19.99
New listing
		Apple iPod Earphones In-Ear only Headphones - White Free ShippingNew listing Apple iPod Earphones In-Ear only Headphones - White Free Shipping $12.00
Click to see more Sirius items at ebay.com
Prices current as of last update, 06/30/15 6:45pm.

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

Home Contact Resources Exchange Links ebay