Across
- 3. process that powers stars
- 7. a set of gravitationally bound non-stellar objects in or out of orbit around a star or star system.
- 8. the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth
- 10. the distance from the Earth to the Sun
- 12. the distance light travels in one year
- 14. a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape it.
- 16. the sun is currently this type of star
- 18. a physical theory that describes how the universe expanded from an initial state of high density and temperature
- 19. a very young star that is still gathering mass from its parent molecular cloud.
- 21. our closest neighboring galaxy
- 23. a luminous spheroid of plasma undergoing nuclear fusion held together by self-gravity.
- 24. the waste product of the Sun
- 25. an astronomical body that orbits a planet, dwarf planet, or small Solar System body
- 26. the sun will end its life as this type of star
Down
- 1. a distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust.
- 2. a powerful and luminous explosion of a star
- 4. all of space and time[a] and their contents
- 5. a large planet of relatively low density consisting predominantly of hydrogen and helium
- 6. the galaxy group that includes the Milky Way
- 9. the newest and most powerful space telescope
- 11. the fuel of the Sun
- 13. a natural science that studies celestial objects and phenomena.
- 15. the first space telescope
- 17. a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity
- 20. an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing.
- 22. a minor planet—an object that is neither a true planet nor a comet—that orbits within the inner Solar System. They are rocky, metallic or icy bodies with no atmosphere.