Memory Game Astronomy Memory GameOnline version Astronomy Memory Game by Grant Studios The "p" in Keplers third law stands or Orbital Period In the core is where fusion of hydrogen occurs in the sun The "r" in Keplers third law stand for Radius Sunspots are cooler than the plasma around them The "r" in Keplers third law stand for Radius Hydrogen and Helium make up most of the suns mass Atoms are combined into heavier elements through the process called Nuclear Fusion A solar prominence (also known as a filament when viewed against the solar disk) is a large, bright feature extending outward from the Sun's surface Hydrogen and Helium make up most of the suns mass According to Keplers first law planets orbit in a Ellipse Atoms are combined into heavier elements through the process called Nuclear Fusion A planets revolution is the slowest when furthest from the sun In the core is where fusion of hydrogen occurs in the sun In the convection zone plasma rises as it heats up then falls A planets revolution is the slowest when furthest from the sun According to Keplers first law planets orbit in a Ellipse In the convection zone plasma rises as it heats up then falls Sunspots are cooler than the plasma around them The "p" in Keplers third law stands or Orbital Period A solar prominence (also known as a filament when viewed against the solar disk) is a large, bright feature extending outward from the Sun's surface