| 1. | He wrote his diploma thesis on physical processes in the Crab Nebula Supernova.
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| 2. | This phenomenon can be seen in interstellar gas, such as the Crab Nebula.
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| 3. | The Crab Nebula was first identified in 1731 by John Bevis.
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| 4. | One of the best examples of this is the Crab Nebula, in Taurus.
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| 5. | The Crab Nebula is often used as a calibration source in X-ray astronomy.
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| 6. | A combined X-ray and optical image of the Crab Nebula.
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| 7. | In the Crab Nebula ArH + occurs in several spots revealed by emission lines.
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| 8. | The cover art uses a picture of the Crab Nebula.
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| 9. | RX J0648.0-4418 is an X-ray pulsator in the Crab nebula.
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| 10. | The Crab Nebula, also known as M1, is the remnant of the ancient supernova.
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