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 Zsbtg900 Portable Nfc Bluetooth Wireless Boombox Speaker SystemNew listing Sony Zsbtg900 Portable Nfc Bluetooth Wireless Boombox Speaker System $124.99 New listing
		*Brand New* Ue Boom Roll- Ultimate Ears Boom - *Green*New listing *Brand New* Ue Boom Roll- Ultimate Ears Boom - *Green* $58.50
New listing
		Sol Republic 1305-35 Interchangeable Headband for Tracks Headphones - PurpleNew listing Sol Republic 1305-35 Interchangeable Headband for Tracks Headphones - Purple $8.99 New listing
		
				Nimzy Vibroblaster Portable Speaker !New listing Nimzy Vibroblaster Portable Speaker ! $150.00
New listing
		Mini Clip Metal Usb Mp3 Player Support Micro Sd Tf Card Music Media NewlyNew listing Mini Clip Metal Usb Mp3 Player Support Micro Sd Tf Card Music Media Newly $0.99 New listing
		Panasonic D Sound headphones and Altec Lansing Ahp423 HeadphonesNew listing Panasonic D Sound headphones and Altec Lansing Ahp423 Headphones $20.00
New listing
		Ihome Ip97 - Working - Black - For 30 Pin Connector Iphone/Ipods - Radio/AlarmNew listing Ihome Ip97 - Working - Black - For 30 Pin Connector Iphone/Ipods - Radio/Alarm $19.99 New listing
		Vintage Original 1963 *Citation A* Instruction Sheets ~ 7 Different TotalNew listing Vintage Original 1963 *Citation A* Instruction Sheets ~ 7 Different Total $24.99
New listing
		SiriusXm Satellite Radio - onyX PlusNew listing SiriusXm Satellite Radio - onyX Plus $47.50 New listing
		Space Gray iPod Touch 6th Gen Generation 16Gb Mkh622Ll/A A1574 Excellent CondNew listing Space Gray iPod Touch 6th Gen Generation 16Gb Mkh622Ll/A A1574 Excellent Cond $0.99
New listing
		Jabra Step (Ote23) Wireless EarbudsNew listing Jabra Step (Ote23) Wireless Earbuds $37.99 New listing
		Star Wars iHome Darth Vader Speaker with BluetoothNew listing Star Wars iHome Darth Vader Speaker with Bluetooth $29.00
New listing
		Apple iPod shuffle 4th Generation Silver (2 Gb)New listing Apple iPod shuffle 4th Generation Silver (2 Gb) $38.00 New listing
		Heart Shaped Headphone Splitter Nib from AvonNew listing Heart Shaped Headphone Splitter Nib from Avon $1.99
New listing
		OnTek Water-Resistant Bluetooth Shower Speaker w/ Mic and Controls / AcquamarineNew listing OnTek Water-Resistant Bluetooth Shower Speaker w/ Mic and Controls / Acquamarine $0.99 New listing
		Black Headphone In-ear 3D Stereo Earbud Earphone For Samsung iPhone iPod 3.5mmNew listing Black Headphone In-ear 3D Stereo Earbud Earphone For Samsung iPhone iPod 3.5mm $0.01
New listing
		Belkin Backup Battery Pack 5g Ipod NewNew listing Belkin Backup Battery Pack 5g Ipod New $6.99 New listing
		Apple iPod nano 3rd Generation Silver (4 Gb)New listing Apple iPod nano 3rd Generation Silver (4 Gb) $19.95
New listing
		Aiwa Hp-X223 Headband Headphones - Silver/BlackNew listing Aiwa Hp-X223 Headband Headphones - Silver/Black $9.99 New listing
		Bluetooth Wireless Headset Stereo Sport Headphone Earphone For iPhone BlackNew listing Bluetooth Wireless Headset Stereo Sport Headphone Earphone For iPhone Black $0.99
New listing
		Apple Ipod Nano 5Th Generation 8Gb Silver No Power (As Is)New listing Apple Ipod Nano 5Th Generation 8Gb Silver No Power (As Is) $5.00 New listing
		Sony Mz-R37 Sp MiniDisc Md Player Recorder W/ Original Box,16 Discs, Rare Etc.New listing Sony Mz-R37 Sp MiniDisc Md Player Recorder W/ Original Box,16 Discs, Rare Etc. $189.99
New listing
		Brix Sirius Streamer Sir-Strpnp1 Portable Satellite Radio ReceiverNew listing Brix Sirius Streamer Sir-Strpnp1 Portable Satellite Radio Receiver $39.99 New listing
		Despicable Me Minions Over The Ear Headphones iHome Built In Microphone eKidsNew listing Despicable Me Minions Over The Ear Headphones iHome Built In Microphone eKids $32.95
New listing
		Bose QuietComfort Qc20i Noise Cancelling In-Ear Only Headphones Apple iOsNew listing Bose QuietComfort Qc20i Noise Cancelling In-Ear Only Headphones Apple iOs $180.00 New listing
		Skullcandy Jib In-Ear only Headphones - PurpleNew listing Skullcandy Jib In-Ear only Headphones - Purple $5.99
New listing
		Alpine Shs-N100 Single Source Wireless Ir HeadphonesNew listing Alpine Shs-N100 Single Source Wireless Ir Headphones $23.00 New listing
		Razer Adaro In-Ear Headphone Analog Earphone Earbuds Headset Gaming Music StereoNew listing Razer Adaro In-Ear Headphone Analog Earphone Earbuds Headset Gaming Music Stereo $29.19
New listing
		Street by 50 Cent Wired Over-Ear Headphones - Shadow Black by Sms AudioNew listing Street by 50 Cent Wired Over-Ear Headphones - Shadow Black by Sms Audio $60.00 New listing
		Beats Studio Wireless Over-Ear Headphone BlackNew listing Beats Studio Wireless Over-Ear Headphone Black $0.99
New listing
		Sol Republic Shadow Wireless In-Ear Headphones-Black/SilverNew listing Sol Republic Shadow Wireless In-Ear Headphones-Black/Silver $99.99 New listing
		Tecsun Pl 310 Et blackNew listing Tecsun Pl 310 Et black $30.00
New listing
		iHome Ih14D Am/Fm Table Radio And Speaker Dock For iPhone/iPod 30-pin (Brown)New listing iHome Ih14D Am/Fm Table Radio And Speaker Dock For iPhone/iPod 30-pin (Brown) $30.00 New listing
		Jbmmj8500 Super Bass Stereo Earphone Hifi Earbud Headset Headphone For Mp3 Mp4New listing Jbmmj8500 Super Bass Stereo Earphone Hifi Earbud Headset Headphone For Mp3 Mp4 $4.33
New listing
		Disney iHome Minnie Mouse Over-The-Ear Headphones New & Sealed! Adorable!New listing Disney iHome Minnie Mouse Over-The-Ear Headphones New & Sealed! Adorable! $29.95 New listing
		Sennheiser Hd 515 Headphones and cable with itNew listing Sennheiser Hd 515 Headphones and cable with it $0.99
New listing
		Nip New In Box New In Pkg Sealed Klipsch Reference On Ear HeadphonesNew listing Nip New In Box New In Pkg Sealed Klipsch Reference On Ear Headphones $139.95 New listing
		Kiddesigns - Disney Frozen Cool Tunes Headphones Fr-140 - Brand New & SealedNew listing Kiddesigns - Disney Frozen Cool Tunes Headphones Fr-140 - Brand New & Sealed $29.95
New listing
		iPod nano (7th generation) Md478Ll 16 Gb, Green + Warranty + Free ShippingNew listing iPod nano (7th generation) Md478Ll 16 Gb, Green + Warranty + Free Shipping $74.95 New listing
		Dancing MiFlower Music Player Full Size Clock~Phone Speaker~Mp3~Ipod AccessoryNew listing Dancing MiFlower Music Player Full Size Clock~Phone Speaker~Mp3~Ipod Accessory $24.95
New listing
		Ruizu 1.8" Tft Bluetooth Mp3 Player Tf card 4G storage Built in Fm Radio B UsNew listing Ruizu 1.8" Tft Bluetooth Mp3 Player Tf card 4G storage Built in Fm Radio B Us $0.99 New listing
		Sealed Beats Bluetooth Studio Wireless Metallic Collection Gold Headphones B0501New listing Sealed Beats Bluetooth Studio Wireless Metallic Collection Gold Headphones B0501 $260.00
New listing
		Jvc Gumy Earbuds Ha-F14-B In-Ear only Headphones - Olive BlackNew listing Jvc Gumy Earbuds Ha-F14-B In-Ear only Headphones - Olive Black $5.99 New listing
		Beats Solo2 Wired On-Ear Headphones - RedNew listing Beats Solo2 Wired On-Ear Headphones - Red $0.99
New listing
		Apple Ipod Touch 5th Generation XtremeMac Matt Screen Protection Anti GlareNew listing Apple Ipod Touch 5th Generation XtremeMac Matt Screen Protection Anti Glare $2.50 New listing
		Spiderman Kid Safe Over The Ear Heaphones W/Volume LimiterNew listing Spiderman Kid Safe Over The Ear Heaphones W/Volume Limiter $22.00
New listing
		Yurbuds Inspire 400 Sweat Proof Sport Earphones Earbuds iPhone Mic & Volume RedNew listing Yurbuds Inspire 400 Sweat Proof Sport Earphones Earbuds iPhone Mic & Volume Red $35.00 New listing
		Libratone Live-Standard-S (Slate Gray) Wireless AirPlay Home Audio SpeakerNew listing Libratone Live-Standard-S (Slate Gray) Wireless AirPlay Home Audio Speaker $150.00
New listing
		Original Monster Studio Beats by Dre WhiteNew listing Original Monster Studio Beats by Dre White $89.99 New listing
		Apple iPod Touch 4th Generation Black (8 Gb)Dcp70183New listing Apple iPod Touch 4th Generation Black (8 Gb)Dcp70183 $0.99
Click to see more Sirius items at ebay.com
Prices current as of last update, 02/04/16 5:25pm.

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

Home Contact Resources Exchange Links ebay