Memory Game Astronomy Memory GameOnline version Astronomy Memory Game by Grant Studios The "r" in Keplers third law stand for Radius In the core is where fusion of hydrogen occurs in the sun In the convection zone plasma rises as it heats up then falls Sunspots are cooler than the plasma around them Sunspots are cooler than the plasma around them The "r" in Keplers third law stand for Radius In the convection zone plasma rises as it heats up then falls According to Keplers first law planets orbit in a Ellipse Atoms are combined into heavier elements through the process called Nuclear Fusion Atoms are combined into heavier elements through the process called Nuclear Fusion In the core is where fusion of hydrogen occurs in the sun Hydrogen and Helium make up most of the suns mass A planets revolution is the slowest when furthest from the sun According to Keplers first law planets orbit in a Ellipse 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 A planets revolution is the slowest when furthest from the sun 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 The "p" in Keplers third law stands or Orbital Period Hydrogen and Helium make up most of the suns mass