Science

3. A massive, hot, and highly luminous star dominating the upper-left section of the H-R diagram.
5. A forecast or statement about what will happen next in a sequence of events.
8. The unit of measurement equal to the distance light can travel through space in one single year.
10. A visual diagram that displays the mathematical relationship between two or more sets of data.
14. Matter, mostly hydrogen, found in the vast spaces stretching between star systems.
17. A descriptive term meaning "relating to a star or stars."
18. A highly tested, well-supported scientific explanation of why natural events occur.
20. A massive collection of billions of stars, gas, and cosmic dust held together by gravity.
24. A measure of a star's true brightness or luminosity if viewed from a standard cosmic distance.
25. A final decision or statement reached by analyzing experimental data and evidence.
26. Statistics, facts, or pieces of information collected during an experiment or observation.
27. The core nuclear process that smashes lighter atoms together to form heavier ones, powering a star.
28. A scatter graph used by astronomers to classify stars by plotting brightness against temperature.

1. Information gathered directly through your senses or scientific instruments.
2. A large celestial body made of hydrogen and helium that generates its own light and energy.
4. A collection of planets, moons, asteroids, and comets that orbit a central star.
6. The specific spiral galaxy that contains our home planet and solar system.
7. The leading scientific explanation for how our universe expanded from a single hot, dense point.
9. A descriptive term meaning "relating to our Sun."
11. The medium-sized, central main-sequence star of our solar system.
12. The complete life cycle and developmental stages that a star goes through over millions or billions of years.
13. A giant interstellar cloud of dust and gas where new stars are born.
15. The final cosmic remnant of a dying high-mass star with gravity so intense that not even light can escape.
16. A simplified drawing, schematic, or plan designed to visually demonstrate how something works.
19. Space and all of the matter and energy inside of it.
21. A measure of how bright a star looks to an observer looking up from Earth.
22. A logical interpretation or explanation based on what you have observed and prior knowledge.
23. A descriptive statement or equation that reliably predicts what will happen under specific natural conditions.