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
		Itis Replacement Earpad cushions For beats by Dr. Dre Studio 2.0 Wired Studio.New listing Itis Replacement Earpad cushions For beats by Dr. Dre Studio 2.0 Wired Studio. $21.36 New listing
		New Rare Sony Mdr-W08L Headband Headphones - BlackNew listing New Rare Sony Mdr-W08L Headband Headphones - Black $99.87
New listing
		Vintage Sportstek Swimming Radio Underwater With Underwater Ear phonesNew listing Vintage Sportstek Swimming Radio Underwater With Underwater Ear phones $15.99 New listing
		Kaito Ka550 Portable Solar / Hand Crank Am/Fm, Shortwave & Noaa Weather EmergenNew listing Kaito Ka550 Portable Solar / Hand Crank Am/Fm, Shortwave & Noaa Weather Emergen $71.37
New listing
		1m 3.5mm (1/8") 4 pole, Trrs right angle Male to Male Aux Audio Cable, Av-1404RNew listing 1m 3.5mm (1/8") 4 pole, Trrs right angle Male to Male Aux Audio Cable, Av-1404R $1.59 New listing
		Am Fm Portable Mini Radio StereoNew listing Am Fm Portable Mini Radio Stereo $8.49
New listing
		I-Home Glow Tunes Led Multi Color Changing Stereo System I-Pods I-Phone NibNew listing I-Home Glow Tunes Led Multi Color Changing Stereo System I-Pods I-Phone Nib $45.99 New listing
		Diskin Premium Bluetooth Wireless Headphone with Built in MicrophoneNew listing Diskin Premium Bluetooth Wireless Headphone with Built in Microphone $19.99
New listing
		Active Sirius Sportster Receiver Sp-R1 w/ Boombox Sp-B1New listing Active Sirius Sportster Receiver Sp-R1 w/ Boombox Sp-B1 $100.00 New listing
		Mpow Bluetooth Wireless Headset Stereo Headphone Earphone Mic For iPhone SamsumgNew listing Mpow Bluetooth Wireless Headset Stereo Headphone Earphone Mic For iPhone Samsumg $33.00
New listing
		Sony Mdr-V700Dj Headphones~Made in Japan Near Mint Needs PadsNew listing Sony Mdr-V700Dj Headphones~Made in Japan Near Mint Needs Pads $39.99 New listing
		Sony Hybrid Sound Stereo Headphones (Xba-H1) *Sound On One Side*New listing Sony Hybrid Sound Stereo Headphones (Xba-H1) *Sound On One Side* $0.99
New listing
		64G Storage Ruizu X06 Hifi Lossless Mp3 Player Fm Recorder Support Tf Card MtNew listing 64G Storage Ruizu X06 Hifi Lossless Mp3 Player Fm Recorder Support Tf Card Mt $22.67 New listing
		As Is: Bose SoundLink Mini Bluetooth Speaker (no power)New listing As Is: Bose SoundLink Mini Bluetooth Speaker (no power) $34.99
New listing
		Honstek In-Ear Earbud Headphones X6, Mic Control and Noise Isolating Earphones,New listing Honstek In-Ear Earbud Headphones X6, Mic Control and Noise Isolating Earphones, $16.49 New listing
		Phillips Docking speakerNew listing Phillips Docking speaker $0.99
New listing
		Soundlink Color Ii Coral Red Wireless Speaker w/ Aux Bad Battery and BluetoothNew listing Soundlink Color Ii Coral Red Wireless Speaker w/ Aux Bad Battery and Bluetooth $44.85 New listing
		Bose QuietComfort Qc15 Headband Headphones - Black/SilverNew listing Bose QuietComfort Qc15 Headband Headphones - Black/Silver $50.00
New listing
		Apple iPod Classic 60Gb 5th Generation A1136 Mp3 Player - BlackNew listing Apple iPod Classic 60Gb 5th Generation A1136 Mp3 Player - Black $0.99 New listing
		Bose SoundLink Color Bluetooth Speaker Ii - Coral RedNew listing Bose SoundLink Color Bluetooth Speaker Ii - Coral Red $60.00
New listing
		Beats By Dr Dre Character Stand For Pill Dude Speaker RedNew listing Beats By Dr Dre Character Stand For Pill Dude Speaker Red $42.99 New listing
		Wireless Bluetooth Car Handsfree Fm Transmitter Mp3 Player Charger F iPhone SpNew listing Wireless Bluetooth Car Handsfree Fm Transmitter Mp3 Player Charger F iPhone Sp $14.42
New listing
		New iHip Side Swipe Bluetooth Headphone with Built in MicrophoneNew listing New iHip Side Swipe Bluetooth Headphone with Built in Microphone $15.00 New listing
		Memorex Portable Cd Boombox with Am Fm Radio Mr3221RNew listing Memorex Portable Cd Boombox with Am Fm Radio Mr3221R $27.50
New listing
		Tested Panasonic Shockwave Cassette Player Rq-Sw44V Walkman/Radio Am/Fm TapeNew listing Tested Panasonic Shockwave Cassette Player Rq-Sw44V Walkman/Radio Am/Fm Tape $9.99 New listing
		Anker® Classic Portable Wireless Bluetooth 4.0 Speaker with 20 Hour Recharge.New listing Anker® Classic Portable Wireless Bluetooth 4.0 Speaker with 20 Hour Recharge. $24.99
New listing
		iPod nano 8Gb Box Only And iPod touch 8Gb Box Only - No iPod nano. No iPod touchNew listing iPod nano 8Gb Box Only And iPod touch 8Gb Box Only - No iPod nano. No iPod touch $3.99 New listing
		Matrix Bluetooth Mini Portable Wireless Speaker Black NewNew listing Matrix Bluetooth Mini Portable Wireless Speaker Black New $19.99
New listing
		Panasonic Vintage Boombox Rx-Cs750 Radio Cassette Player PortableNew listing Panasonic Vintage Boombox Rx-Cs750 Radio Cassette Player Portable $49.95 New listing
		Sennheiser M2 Black Momentum 2.0 On-Ear for iPhone/iPad/iPod Brand New!New listing Sennheiser M2 Black Momentum 2.0 On-Ear for iPhone/iPad/iPod Brand New! $119.99
New listing
		Original 3.5Mm Audio Aux Cord by Beats By DreNew listing Original 3.5Mm Audio Aux Cord by Beats By Dre $8.00 New listing
		Powerbeats 3 Wireless (White)New listing Powerbeats 3 Wireless (White) $120.00
New listing
		Silicone Earbuds Tips 3 Pairs for Bose In Ear Headphones Earphones S&C nbNew listing Silicone Earbuds Tips 3 Pairs for Bose In Ear Headphones Earphones S&C nb $1.19 New listing
		Brand New! Lg Tone Platinum Premium Wireless Stereo Bluetooth HeadsetNew listing Brand New! Lg Tone Platinum Premium Wireless Stereo Bluetooth Headset $84.95
New listing
		Onn Premium Wireless Over Ear Headphones Black CompleteNew listing Onn Premium Wireless Over Ear Headphones Black Complete $8.25 New listing
		On Ear Headphones, Marvotek Stereo Headphones for Girls Wired Headphones withNew listing On Ear Headphones, Marvotek Stereo Headphones for Girls Wired Headphones with $26.49
New listing
		SiriusXm Onyx Xdnx1V1 For SiriusXm Car & Home Satellite Radio ReceiverNew listing SiriusXm Onyx Xdnx1V1 For SiriusXm Car & Home Satellite Radio Receiver $50.00 New listing
		Ihip Nff10200Bar Baltimore Ravens Earbuds Mini Nfl Team LogoNew listing Ihip Nff10200Bar Baltimore Ravens Earbuds Mini Nfl Team Logo $12.99
New listing
		Apple iPod Classic A1238 Silver Mp3 160GbNew listing Apple iPod Classic A1238 Silver Mp3 160Gb $0.97 New listing
		ViNtAgE Grundig Satellit 6000 am fm Mutlti Band Shortwave Band RadioNew listing ViNtAgE Grundig Satellit 6000 am fm Mutlti Band Shortwave Band Radio $159.95
New listing
		Tested Sony Sports Walkman Wm-Fs222 Portable Cassette Player Tape/Radio S2New listing Tested Sony Sports Walkman Wm-Fs222 Portable Cassette Player Tape/Radio S2 $8.99 New listing
		Fm Scan Radio NibNew listing Fm Scan Radio Nib $1.50
New listing
		Nyne Multimedia Bass Sport Portable Bluetooth Speaker (Black/Red) & Fugoo GoNew listing Nyne Multimedia Bass Sport Portable Bluetooth Speaker (Black/Red) & Fugoo Go $200.00 New listing
		Wireless Bluetooth Super Bass Stereo Speaker Portable For SmartPhone Tablet PinkNew listing Wireless Bluetooth Super Bass Stereo Speaker Portable For SmartPhone Tablet Pink $7.99
$16.49 New listing
		Earphones With Microphone E181 Premium Earbuds Stereo Headphones and Noise New!New listing Earphones With Microphone E181 Premium Earbuds Stereo Headphones and Noise New! $14.49
New listing
		Sony Mdr-100Aap-B Premium Wired Hi-Res Stereo Headphones - Charcoal BlackNew listing Sony Mdr-100Aap-B Premium Wired Hi-Res Stereo Headphones - Charcoal Black $99.00 New listing
		Earpads Ear Buds Ear Gel for Samsung Gear Circle Sm-R130 Earphones ,Bluewall EarNew listing Earpads Ear Buds Ear Gel for Samsung Gear Circle Sm-R130 Earphones ,Bluewall Ear $11.75
New listing
		Apple iPod touch 5th Generation Blue (16 Gb)New listing Apple iPod touch 5th Generation Blue (16 Gb) $85.95
Click to see more Sirius items at ebay.com
Prices current as of last update, 04/22/17 9:35am.

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

Home Contact Resources Exchange Links ebay