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Across
  1. 2. The central region of the Sun where nuclear fusion occurs, producing enormous amounts of energy under extreme heat and pressure.
  2. 4. The longest and most stable phase in a star’s life
  3. 5. A sudden, powerful burst of energy from the Sun’s surface that releases ultraviolet, X-ray, and radio waves, potentially disrupting satellites and power grids on Earth.
  4. 7. The dense, hot core that remains after a star like the Sun sheds its outer layers; it no longer undergoes fusion and cools over time.
  5. 9. A dark, cooler region on the Sun’s surface caused by intense magnetic activity that disrupts heat flow; sunspots follow an 11-year cycle.
  6. 10. A natural light display in Earth's sky, caused by solar wind particles interacting with Earth’s magnetic field and atmosphere; known as the northern or southern lights.
Down
  1. 1. A stream of charged particles (plasma) released from the Sun’s corona that travels through space and influences space weather near Earth.
  2. 3. A powerful explosion at the end of a massive star’s life, often resulting in a neutron star or black hole, depending on the remaining mass.
  3. 6. A late stage in a star’s life when it expands and cools after using up its core hydrogen, possibly engulfing nearby planets.
  4. 8. process in which hydrogen atoms join together to form helium, releasing energy; occurs in the Sun’s core and powers the Sun.