Two views of Halley's comet,May 12 and 15,1910,showing tails 30 degrees and 40 degrees long respectively. Photographed with a 10-inch focus Tessar lens. Halley is the only naked-eye comet certain to return within a human lifetime (every 75 year or so). It derives its name from Edmond Halley,an eighteenth-century astronomer who computed its orbit. The comet has been observed by astronomers since at least 240 BC | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Hale Observatory |
Bildgröße: | 2880 px × 2244 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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