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
		Apple iPod shuffle 2nd Generation 1gb light blue Free Shipping as is BrokenNew listing Apple iPod shuffle 2nd Generation 1gb light blue Free Shipping as is Broken New listing
		Beats by Dr. Dre Solo Hd Headband Headphones - BlackNew listing Beats by Dr. Dre Solo Hd Headband Headphones - Black
New listing
		David Clark headphonesNew listing David Clark headphones New listing
		Soundlogic Xt Bluetooth Mini Capsule Speakers with Built in Microphone - BlackNew listing Soundlogic Xt Bluetooth Mini Capsule Speakers with Built in Microphone - Black
New listing
		Sony D-Ej017Ck Walkman Cd Player G-Protection, Mega Bass - Cd-R/Rw CompatibleNew listing Sony D-Ej017Ck Walkman Cd Player G-Protection, Mega Bass - Cd-R/Rw Compatible New listing
		Brand New Sharper Image Foldable Bluetooth Headphones Silver ColoredNew listing Brand New Sharper Image Foldable Bluetooth Headphones Silver Colored
New listing
		Brand New in Package Craig Chp5009Bk Jet Black&Red- Fold-able Stereo HeadphonesNew listing Brand New in Package Craig Chp5009Bk Jet Black&Red- Fold-able Stereo Headphones New listing
		For Apple Iphone 6 4.7 Textured Edge Grip Double Layer Case W/Kickstand -Blk/HpNew listing For Apple Iphone 6 4.7 Textured Edge Grip Double Layer Case W/Kickstand -Blk/Hp
New listing
		Bose Ie2 In-Ear only Headphones - Black/WhiteNew listing Bose Ie2 In-Ear only Headphones - Black/White New listing
		Apple iPod Touch 4th Generation Black (32 Gb)New listing Apple iPod Touch 4th Generation Black (32 Gb)
New listing
		3.5mm Jack Audio Stereo Splitter Cable 1 Male to 2 Female c101 for iPhone iPodNew listing 3.5mm Jack Audio Stereo Splitter Cable 1 Male to 2 Female c101 for iPhone iPod New listing
		Sony Zs-S3iPn Black Portable Cd Player iPhone 5 iPod Dock Speaker ( No Remote )New listing Sony Zs-S3iPn Black Portable Cd Player iPhone 5 iPod Dock Speaker ( No Remote )
New listing
		Philips Jogproof Portable Compact Disc Player Ax3218/17 Brand New Factory SealedNew listing Philips Jogproof Portable Compact Disc Player Ax3218/17 Brand New Factory Sealed New listing
		Lot of Two Apple iPod Nano 6th Generation Graphite and Silver (both 8 Gb)New listing Lot of Two Apple iPod Nano 6th Generation Graphite and Silver (both 8 Gb)
New listing
		SoundLogic Xt Suction Speaker Bluetooth Rechargeable WirelessNew listing SoundLogic Xt Suction Speaker Bluetooth Rechargeable Wireless New listing
		Orator speaker for phoneNew listing Orator speaker for phone
New listing
		Power Beats 2 Wireless Beats By Dre *Red* Noise Isolation Ear-Hook, Brand NewNew listing Power Beats 2 Wireless Beats By Dre *Red* Noise Isolation Ear-Hook, Brand New New listing
		Panasonic 2-Way Headset Kx-Tca95New listing Panasonic 2-Way Headset Kx-Tca95
New listing
		Hdmx Jam Classic Bluetooth Wireless Speaker - GreenNew listing Hdmx Jam Classic Bluetooth Wireless Speaker - Green New listing
		Original Genuine Beats by Dr. Dre Urbeats In-Ear only Headphones From HtcNew listing Original Genuine Beats by Dr. Dre Urbeats In-Ear only Headphones From Htc
New listing
		Polaroid Mp3 Bundle Touch Screen Player W/Noise Isolating Earbuds (1000 Songs)New listing Polaroid Mp3 Bundle Touch Screen Player W/Noise Isolating Earbuds (1000 Songs) New listing
		Eton Rks200 All-Terrain Portable Solar Wireless Sound SystemNew listing Eton Rks200 All-Terrain Portable Solar Wireless Sound System
New listing
		Audio Cable 3.5mm 1/8" for Beats by Dr Dre - Red Volume - Solo 2 Studio WirelessNew listing Audio Cable 3.5mm 1/8" for Beats by Dr Dre - Red Volume - Solo 2 Studio Wireless New listing
		Splash Proof Shower Bath Mirror Cd Player / Radio Built-In Speakers Great GiftNew listing Splash Proof Shower Bath Mirror Cd Player / Radio Built-In Speakers Great Gift
New listing
		Dx-Ca102 Universal Cassette AdapterNew listing Dx-Ca102 Universal Cassette Adapter New listing
		Sirius Sportster 4 Satellite Radio Receiver Ic# 5721A-Sp4New listing Sirius Sportster 4 Satellite Radio Receiver Ic# 5721A-Sp4
New listing
		Genuine Apple iPod iPhone Dock 30-Pin Connector & S Video Model # A1153 WhiteNew listing Genuine Apple iPod iPhone Dock 30-Pin Connector & S Video Model # A1153 White New listing
		Sony Mdr-Rf985Rk Headband Wireless Headphones - BlackNew listing Sony Mdr-Rf985Rk Headband Wireless Headphones - Black
New listing
		Apple iPod touch 2nd Generation (8 Gb)New listing Apple iPod touch 2nd Generation (8 Gb) New listing
		Pyle Pipadk1 iPad/iPhone/iPod Dock Audio Output Charging, Sync W/iTunes & RemoteNew listing Pyle Pipadk1 iPad/iPhone/iPod Dock Audio Output Charging, Sync W/iTunes & Remote
New listing
		Battery for SanDisk Sansa Mp3 e250 e260 e250R e260 Sdamx4-Rbk-G10 e270 e280New listing Battery for SanDisk Sansa Mp3 e250 e260 e250R e260 Sdamx4-Rbk-G10 e270 e280 New listing
		New Sharper Image 4-in-1 Mp3Wma Digital Media Player with Video/Still CameraNew listing New Sharper Image 4-in-1 Mp3Wma Digital Media Player with Video/Still Camera
New listing
		Audio - Sony Bluetooth SpeakersNew listing Audio - Sony Bluetooth Speakers New listing
		Philips Sbchp430 Headband Headphones - Black!New listing Philips Sbchp430 Headband Headphones - Black!
New listing
		Usb Data Sync Charger Cable cord c323 for Apple iPhone iPod Touch 4 3 2 /yellowNew listing Usb Data Sync Charger Cable cord c323 for Apple iPhone iPod Touch 4 3 2 /yellow New listing
		Apple iPod Classic 6th Generation Silver (80 Gb) Clean, Reset for useNew listing Apple iPod Classic 6th Generation Silver (80 Gb) Clean, Reset for use
New listing
		Microsoft Zune Hd Black ( 32 Gb ) Digital Media PlayerNew listing Microsoft Zune Hd Black ( 32 Gb ) Digital Media Player New listing
		New Red Heavy Duty Hard Case + Screen Guard For iPod Touch 5 Generation 5th GenNew listing New Red Heavy Duty Hard Case + Screen Guard For iPod Touch 5 Generation 5th Gen
New listing
		Beats Dr. Dre Pro Silver/Black Headphones - Brand New & SealedNew listing Beats Dr. Dre Pro Silver/Black Headphones - Brand New & Sealed New listing
		Polaroid Bluetooth Wireless Speaker with Led Touch Pad, Built-In MicrophoneNew listing Polaroid Bluetooth Wireless Speaker with Led Touch Pad, Built-In Microphone
New listing
		41" Soundlogic Speaker Tower Model # Bts-1/4927 12ov-60Hz 50wNew listing 41" Soundlogic Speaker Tower Model # Bts-1/4927 12ov-60Hz 50w New listing
		Samsung Level On Premium on-ear headphones (missing carrying case)New listing Samsung Level On Premium on-ear headphones (missing carrying case)
New listing
		Sirius xm radio mobile onyxNew listing Sirius xm radio mobile onyx New listing
		New Light Blue Silicone Rubber Case Skin Gel Cover Apple iPod Nano 3G 3rd GenNew listing New Light Blue Silicone Rubber Case Skin Gel Cover Apple iPod Nano 3G 3rd Gen
New listing
		Micro Sd Tf Mini Clip Usb Mp3 Music Media Player with Lcd 8Gb WhiteNew listing Micro Sd Tf Mini Clip Usb Mp3 Music Media Player with Lcd 8Gb White New listing
		New In Box Craig Cma3015C White ( 512 Mb ) Digital Media Player Speaker SystemNew listing New In Box Craig Cma3015C White ( 512 Mb ) Digital Media Player Speaker System
New listing
		3.5Mm Aux Extension Audio Stereo Cable Cord Black/Silver Iphone 5 4S 4 Ipod NanoNew listing 3.5Mm Aux Extension Audio Stereo Cable Cord Black/Silver Iphone 5 4S 4 Ipod Nano New listing
		Philips Lfh0234 DeLuxe - Headphones - vertical Lfh0234New listing Philips Lfh0234 DeLuxe - Headphones - vertical Lfh0234
Click to see more Sirius items at ebay.com
Prices current as of last update, 03/30/15 7:30pm.

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

Home Contact Resources Exchange Links ebay