This page describes an image Sirius A with his faint white dwarf companion Sirius B
Scarica File ( immagine 1.45 MB)
Didascalia:
This Hubble Space Telescope image highlights Sirius, the brightest star in Earth’s night sky, appearing as an intensely luminous object at the center with prominent cross-shaped diffraction spikes. These spikes, along with the saturated glow around the main star, are caused by the Sirius' light being spread out by the telescope and camera used to make this image. Slightly below and to the left of the main star, a tiny point of light marks Sirius B, a much dimmer object captured thanks to Hubble’s high sensitivity.
Sirius A is an A-type star, known for its high surface temperature and strong white-blue light, while Sirius B is a compact white dwarf, the dense remnant of a star that has exhausted its nuclear fuel. Together, they form a well-known Binary star system located about 8.6 light-years from Earth.
Sirius B was originally a higher mass and brighter star that burned through its hydrogen fuel more quickly than Sirius A. This led to Sirius B evolving into a red giant and eventually ending its life as a planetary nebula, leaving only the remains of its core as a white dwarf orbiting Sirius A.
Didascalie in altre lingue
Crediti per l'immagine: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester) Link per i Crediti
Termini di glossario connessi:
Nana Bianca
, Sirio
, Stella binaria
, Stella di tipo A
Licenza per l'immagine: Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
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Didascalie in lingue diverse:
Didascalia: Dieses Bild des Hubble-Weltraumteleskops zeigt Sirius, den hellsten Stern am Nachthimmel der Erde, der als intensiv leuchtendes Objekt in der Mitte mit markanten, kreuzförmigen Beugungsspitzen erscheint. Diese Strahlen sowie das übersättigte Leuchten um den Hauptstern herum entstehen dadurch, dass das Licht von Sirius durch das Teleskop und die Kamera, mit denen dieses Bild aufgenommen wurde, gestreut wird. Etwas unterhalb und links vom Hauptstern markiert ein winziger Lichtpunkt Sirius B, ein weitaus schwächeres Objekt, das dank der hohen Empfindlichkeit des Hubble-Teleskops erfasst werden konnte.
Sirius A ist ein Stern vom Typ A, bekannt für seine hohe Oberflächentemperatur und sein starkes weiß-blaues Licht, während Sirius B ein kompakter Weißer Zwerg ist, der dichte Überrest eines Sterns, der seinen Kernbrennstoff aufgebraucht hat. Zusammen bilden sie ein bekanntes Doppelsternsystem, das etwa 8,6 Lichtjahre von der Erde entfernt liegt.
Sirius B war ursprünglich ein massereicherer und hellerer Stern, der seinen Wasserstoffvorrat schneller verbrauchte als Sirius A. Dies führte dazu, dass sich Sirius B zu einem Roten Riesen entwickelte und schließlich sein Leben als planetarischer Nebel beendete, wobei nur die Überreste seines Kerns als Weißer Zwerg zurückblieben, der Sirius A umkreist.
Crediti per l'immagine: NASA, ESA, H. Bond (STScI) und M. Barstow (Universität Leicester)
Termini di glossario connessi: A-Stern , Doppelsternsystem , Sirius , Weißer Zwerg Stato di traduzione della didascalia: Non ancora approvato da un revisore
Traduttori della didascalia: Simon Kraus
Didascalia: This Hubble Space Telescope image highlights Sirius, the brightest star in Earth’s night sky, appearing as an intensely luminous object at the center with prominent cross-shaped diffraction spikes. These spikes, along with the saturated glow around the main star, are caused by the Sirius' light being spread out by the telescope and camera used to make this image. Slightly below and to the left of the main star, a tiny point of light marks Sirius B, a much dimmer object captured thanks to Hubble’s high sensitivity.
Sirius A is an A-type star, known for its high surface temperature and strong white-blue light, while Sirius B is a compact white dwarf, the dense remnant of a star that has exhausted its nuclear fuel. Together, they form a well-known Binary star system located about 8.6 light-years from Earth.
Sirius B was originally a higher mass and brighter star that burned through its hydrogen fuel more quickly than Sirius A. This led to Sirius B evolving into a red giant and eventually ending its life as a planetary nebula, leaving only the remains of its core as a white dwarf orbiting Sirius A.
Crediti per l'immagine: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)
Termini di glossario connessi: A-type Star , Binary Star , Sirius , White Dwarf
