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