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  1. What is Astrophysics? | Space

  2. Astrophysics - Wikipedia

  3. 天体物理学 - 维基百科,自由的百科全书

  4. NASA Astrophysics - Science@NASA

  5. Astrophysics | Astronomy, Cosmic Objects, & Space | Britannica

  6. What is astrophysics? | Space - EarthSky

  7. What is Astrophysics, and Why It Matters? - Astronomy Explained

  8. Astrophysics | What is, what does it study, history ... - Euston96

  9. Astrophysics - Encyclopedia.com

  10. What is Astrophysics? (with pictures) - AllTheScience