Across
- 4. When an object moves towards the receiver.
- 8. The simplest element.
- 10. American astronomer who played a crucial role in establishing the field of extragalactic astronomy.
- 11. All forms of matter and energy, and the structures they form.
- 13. An explanation of the early development of the Universe.
- 14. Who revolutionized astronomy with his theory of stellar nucleosynthesis.
- 16. The full range of electromagnetic radiation.
- 18. Records the composition of light emitted.
Down
- 1. The faint remnant glow of the big bang.
- 2. A huge collection of gas, dust, and billions of stars.
- 3. Limited range of wavelengths of electromagnetic radiation.
- 5. Who co-discovered the cosmic microwave background.
- 6. American radio astronomer, shared the 1978 Nobel Prize in physics.
- 7. 2nd element in the periodic table.
- 9. Natural science that studies celestial objects and the phenomena.
- 12. The capacity for doing work.
- 15. Most famous scientist in human history.
- 17. When an object moves away from receiver.