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
		Rca Cd Player Rp 2525 - Needs RepairNew listing Rca Cd Player Rp 2525 - Needs Repair $3.00 New listing
		Chevrolet Traverse 2009 iPod Iphone Nano Car Installation Kit Adapter Pxamg NewNew listing Chevrolet Traverse 2009 iPod Iphone Nano Car Installation Kit Adapter Pxamg New $99.95
New listing
		Apple iPod classic Black (80 Gb)New listing Apple iPod classic Black (80 Gb) $60.00 New listing
		Sony Cfd-535 Portable Boombox Cd Cassette Am/Fm Stereo Ghetto Blaster W/RemoteNew listing Sony Cfd-535 Portable Boombox Cd Cassette Am/Fm Stereo Ghetto Blaster W/Remote $49.99
New listing
		Bose Soundtrue On-Ear Stereo Headphones w/ Mic Controls White Genuine *Nib*New listing Bose Soundtrue On-Ear Stereo Headphones w/ Mic Controls White Genuine *Nib* $99.99 New listing
		Auvio Universal Expanding Speaker (White)New listing Auvio Universal Expanding Speaker (White) $13.99
New listing
		Apple iPod Classic 5th Generation White (30 Gb) Bundle w/ Case and Car ChargerNew listing Apple iPod Classic 5th Generation White (30 Gb) Bundle w/ Case and Car Charger $70.00 New listing
		Bluetooth Shower Speaker OrangeNew listing Bluetooth Shower Speaker Orange $21.73
New listing
		Beats by Dre solo RedNew listing Beats by Dre solo Red $100.00 New listing
		New Jbl Pulse by Harman Wireless Bluetooth Speaker w/ Led Light Show New in BoxNew listing New Jbl Pulse by Harman Wireless Bluetooth Speaker w/ Led Light Show New in Box $169.00
New listing
		Apple iPod touch 5th Gen Space Gray (32 Gb) 8.5/10 Condition Works 100%New listing Apple iPod touch 5th Gen Space Gray (32 Gb) 8.5/10 Condition Works 100% $179.99 New listing
		Apple iPod Touch 4th Generation Black (32 Gb)New listing Apple iPod Touch 4th Generation Black (32 Gb) $119.99
New listing
		Harmon kardon onyx studioNew listing Harmon kardon onyx studio $175.00 New listing
		Apple iPod nano 7th Generation Product Red (16 Gb) w/Red Clip Case & Zagg BundleNew listing Apple iPod nano 7th Generation Product Red (16 Gb) w/Red Clip Case & Zagg Bundle $119.95
New listing
		Xoopar Boy Boy GaGa Usb Stereo Speakers NibNew listing Xoopar Boy Boy GaGa Usb Stereo Speakers Nib $14.99 New listing
		Bose Qc2 Quiet Comfort Acoustic Noise Cancelling Headphones - SilverNew listing Bose Qc2 Quiet Comfort Acoustic Noise Cancelling Headphones - Silver $0.99
New listing
		SanDisk Sansa m240 Gray ( 1gb ) Digital Media Player Used in Good ConditionNew listing SanDisk Sansa m240 Gray ( 1gb ) Digital Media Player Used in Good Condition $6.99 New listing
		New Disney iHome Noise Isolating Earphones with Pouch - Minni MouseNew listing New Disney iHome Noise Isolating Earphones with Pouch - Minni Mouse $8.99
New listing
		Shure Se846 In-Ear only Headphones - ClearNew listing Shure Se846 In-Ear only Headphones - Clear $299.95 New listing
		Philips Shl5605 Headband Headphones - BeigeNew listing Philips Shl5605 Headband Headphones - Beige $15.00
New listing
		Lilly Pulitzer Ear Buds & Pouch Gift Set NewNew listing Lilly Pulitzer Ear Buds & Pouch Gift Set New $12.99 New listing
		Supersonic Portable Speaker For Ipod & Any Other Music Player (White)New listing Supersonic Portable Speaker For Ipod & Any Other Music Player (White) $34.75
New listing
		Kicker Amphitheater 40ik5Bt High Performance Audio System w/ BluetoothNew listing Kicker Amphitheater 40ik5Bt High Performance Audio System w/ Bluetooth $19.99 New listing
		New Super Mario Bros Mobile Headphone Headset Earphone Earbud For iPhone Mp3 /4New listing New Super Mario Bros Mobile Headphone Headset Earphone Earbud For iPhone Mp3 /4 $4.95
New listing
		Frends Taylor, Silver & Black Headphones New Lifetime WarrantyNew listing Frends Taylor, Silver & Black Headphones New Lifetime Warranty $74.99 New listing
		Philips Rich Bass Neckband Headphones Shs5200/28 (Replaces Shs5200)New listing Philips Rich Bass Neckband Headphones Shs5200/28 (Replaces Shs5200) $36.23
New listing
		Brookstone Big Blue Live Wireless SpeakerNew listing Brookstone Big Blue Live Wireless Speaker $49.99 New listing
		Jbuds Hi Fi Noi
2000
se Reducing Ear Buds With Universal Microphone WhiteNew listing Jbuds Hi Fi Noi 2000 se Reducing Ear Buds With Universal Microphone White $23.50
New listing
		Bose Soundlink Mobile Speaker Ii Bluetooth Wireless White/TanNew listing Bose Soundlink Mobile Speaker Ii Bluetooth Wireless White/Tan $199.99 New listing
		Phillips Go Gear Ariaz 8gbNew listing Phillips Go Gear Ariaz 8gb $19.99
New listing
		Cmoy audiophile headphone/spy ear/hearing aid amplifier - custom,unique designNew listing Cmoy audiophile headphone/spy ear/hearing aid amplifier - custom,unique design $36.00 New listing
		Lightweight Portable Headphone Black Adjustable Headband Kph7New listing Lightweight Portable Headphone Black Adjustable Headband Kph7 $8.58
New listing
		Jbl OnBeat Mini Dock High Performance Speaker with Lightning ConnectorNew listing Jbl OnBeat Mini Dock High Performance Speaker with Lightning Connector $58.00 New listing
		Beats™ Pill Xl™ Portable Speaker, BlackNew listing Beats™ Pill Xl™ Portable Speaker, Black $275.00
New listing
		Hexsl bluetooth speakerNew listing Hexsl bluetooth speaker $30.00 New listing
		Zone 4 In 1 Wireless Headphones Online Chat Fm Radio Wired Headphones Range 90 FNew listing Zone 4 In 1 Wireless Headphones Online Chat Fm Radio Wired Headphones Range 90 F $19.99
New listing
		Philips Noise Cancelling In-ear Headphones | model Shn2600New listing Philips Noise Cancelling In-ear Headphones | model Shn2600 $24.99 New listing
		Microsoft Zune Red 80Gb.New Hard Drive.New listing Microsoft Zune Red 80Gb.New Hard Drive. $9.99
New listing
		Apple iPod classic 5th generation white (30 Gb)New listing Apple iPod classic 5th generation white (30 Gb) $49.99 New listing
		Ilive iSb33S Bluetooth(R) SpeakerNew listing Ilive iSb33S Bluetooth(R) Speaker $23.95
New listing
		Black Adjustable Over-Ear Earphone Headset 3.5mm For iPod iPhone Mp3 Mp4 4S 5SNew listing Black Adjustable Over-Ear Earphone Headset 3.5mm For iPod iPhone Mp3 Mp4 4S 5S $0.01 New listing
		Bose Sounddock 10 Music System With Bluetooth Used Less Than 50 Hours Pristine!New listing Bose Sounddock 10 Music System With Bluetooth Used Less Than 50 Hours Pristine! $289.00
New listing
		Sony D-50/D-5 Cd compact player Kny12 the world's second portable Cd player oopNew listing Sony D-50/D-5 Cd compact player Kny12 the world's second portable Cd player oop $150.00 New listing
		Bang & Olufsen A8 Ear-Hook Headphones - Aluminium/BlackNew listing Bang & Olufsen A8 Ear-Hook Headphones - Aluminium/Black $80.00
New listing
		Beats by Dr. Dre Pill Portable Stereo Bluetooth Speaker Red - Brand New 1.0New listing Beats by Dr. Dre Pill Portable Stereo Bluetooth Speaker Red - Brand New 1.0 $125.00 New listing
		Ue Ultimate Ears Boom S-00122 Wireless Bluetooth Speaker!New listing Ue Ultimate Ears Boom S-00122 Wireless Bluetooth Speaker! $115.00
New listing
		sennheiser wireless headphonesNew listing sennheiser wireless headphones $40.00 New listing
		New Juicy Couture Mp3 iPhone Headphones Ear Buds with CaseNew listing New Juicy Couture Mp3 iPhone Headphones Ear Buds with Case $38.99
Click to see more Sirius items at ebay.com
Prices current as of last update, 10/24/14 7:45pm.

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

Home Contact Resources Exchange Links ebay