star

2. The central region of the Sun where nuclear fusion occurs, producing enormous amounts of energy under extreme heat and pressure.
4. The longest and most stable phase in a star’s life
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.
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.
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.
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.

1. A stream of charged particles (plasma) released from the Sun’s corona that travels through space and influences space weather near Earth.
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.
6. A late stage in a star’s life when it expands and cools after using up its core hydrogen, possibly engulfing nearby planets.
8. process in which hydrogen atoms join together to form helium, releasing energy; occurs in the Sun’s core and powers the Sun.