Stellar Crossword 2024

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Across
  1. 1. The philosophical challenge of justifying predictions about unobserved events based on past observations.
  2. 6. The first human in space, an icon of exploration.
  3. 7. Heat bouncing off greenhouse gases, keeping Earth warmer.
  4. 11. Ultra-cooperative communities, epitomized by bees and ants.
  5. 12. A cosmological model proposing that the universe alternates between expansion and contraction cycles.
  6. 15. Nature’s endless loop of carbon through air, water, and earth.
  7. 17. When greenhouse gases can’t absorb more heat.
  8. 22. Venusian volcanic formations, flat and circular.
  9. 23. A fundamental rule or equation dictating how systems transform across time.
  10. 24. The philosophy prioritizing individual freedom, often clashing with determinism.
  11. 27. The spacecraft that carried Yuri Gagarin into orbit.
  12. 28. Surreal, oppressive, and illogical situations that defy understanding.
  13. 30. A model of spacetime where past, present, and future coexist equally as a “frozen” whole.
  14. 31. Saturn’s moon with methane lakes and a dense atmosphere.
  15. 33. The process where quantum spacetime transitions into the classical geometry we observe today.
  16. 35. Protective behaviors to fend off rivals and ensure reproductive exclusivity.
  17. 42. The evolutionary principle stating males gain more from multiple mates than females.
  18. 44. A thought experiment featuring a being capable of perfect prediction if it knew the precise location and momentum of every particle.
  19. 45. Substellar objects too small to ignite nuclear fusion.
  20. 46. How trapped gases heat a planet’s atmosphere.
  21. 49. A realm of icy objects and dwarf planets beyond Neptune.
  22. 50. The rapid rotation of Venus’s atmosphere, far exceeding its surface rotation.
  23. 51. The delusion of being better, smarter, or more capable than others.
  24. 52. The philosophical stance reconciling free will with deterministic principles.
  25. 53. A harmless species masquerading as a harmful one to evade predators.
  26. 54. The apparent motion of stars due to Earth’s orbit.
  27. 55. Mobile DNA elements that can move within the genome, reshaping its structure.
Down
  1. 2. The reason the sky appears blue on Earth.
  2. 3. Bold, disruptive patterns designed to baffle and mislead predators or prey.
  3. 4. Human spacecraft currently exploring interstellar space.
  4. 5. The assumption that humans are the universe’s pinnacle.
  5. 8. The study of planets by comparing their features and processes.
  6. 9. Probe that landed on Titan, unveiling its mysterious surface.
  7. 10. A sneaky tactic where eggs are laid in another species’ nest to avoid parenting.
  8. 13. The nearly unsolvable task of predicting the motion of three gravitationally interacting bodies.
  9. 14. Hypothetical cloud of icy bodies at the edge of the solar system.
  10. 16. The birthplace of the Keeling Curve and modern climate science.
  11. 18. Hameroff and Penrose suggest that consciousness and free will emerge from this sub-neuronal structure.
  12. 19. Saturn’s explorer, revealing its rings and moons.
  13. 20. Thresholds where small changes unleash irreversible climate impacts.
  14. 21. Named after Vulcan, the fiery Roman god.
  15. 25. The trio of toxic traits: narcissism, Machiavellian cunning, and psychopathy.
  16. 26. The quantum state where particles exist in multiple configurations simultaneously.
  17. 29. The starting state of a system that determines how it evolves over time.
  18. 32. The boundary where the Sun’s solar wind meets interstellar wind.
  19. 34. The conviction that one’s group is uniquely superior to all others.
  20. 36. How complex phenomena arise from simple individual interactions.
  21. 37. The philosophy that every event, including moral decisions, is governed by prior causes.
  22. 38. The oceans’ subtle swelling as water warms and expands.
  23. 39. The graph that tells the story of rising CO2.
  24. 40. Lixing Sun proposed two laws governing this universal behavior in nature.
  25. 41. The method of understanding complex systems by breaking them into simpler components.
  26. 43. The universe’s properties are naturally-tuned for our existence.
  27. 47. Astronauts’ life-changing view of Earth from space.
  28. 48. Neptune’s icy moon with a retrograde orbit.