Mira double star,Chandra X-ray image
Bildnummer 11885871
| Mira double star system,Chandra X-ray telescope image. The system comprises Mira A (right),a huge red giant,and Mira B,a tiny white dwarf. Material from the red giant is attracted to the extremely dense white dwarf by its powerful gravity,and emits X-rays as it is accelerated and heated in an accretion disc around it. The two stars are separated by around 12 billion kilometres. Mira (Omicron Ceti) is a variable star. The regular pulsations in size of the red giant mean that it varies in brightness by a factor of around 1700 over a period of 331 days. It lies around 420 light years from Earth in the constellation Cetus. Image taken on 6th December 2003 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / NASA |
| Bildgröße: | 2729 px × 2320 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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