Ch 9 Terms Beyond Our Solar System(1).docx - GEOLOGY 1401 CHAPTER 9 “Beyond Our Solar System” TERMS QUESTIONS Professor Andrew LaFavers Dallas

Ch 9 Terms Beyond Our Solar System(1).docx - GEOLOGY 1401...

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GEOLOGY 1401 CHAPTER 9 “Beyond Our Solar System” TERMS & QUESTIONS Professor Andrew LaFavers Dallas Baptist University *Know the importance of each term below and the selected questions at the end of the chapter. This is not to be turned in to me. This is for your guidance of the chapter as you read it and for preparing for exams. 1. Absolute magnitude – a way to compare the intrinsic, or absolute brightness of celestial objects 2. Barred spiral galaxy – central bar- shaped structure composed of stars 3. Big Bang Theory – universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today 4. Black hole – region of space time exhibiting such strong gravitational effects that nothing can escape from inside it 5. Bright nebula – interstellar clouds of gas and dust where stars are born or have diied 6. Cosmological red shift – the wavelength of the emitted radiation is lengthened due to the expansion of the universe 7. Cosmology – involves the origin and evolution of the universe, from the Big Bang to today and on into the future 8. Dark energy – hypothetical from of
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