a description of the solar system in which all of the planets revolve around the earth
a description of the solar system in which all of the planets revolve around the sun
the tendency of a moving object to continue in a straight line or a stationary object to remain in place
an oval shape; the shape of the planets orbit
the force that keeps the planets in orbit around the sun
a loop of gas that protrudes from the suns surface, linking parts of sunspot regions
a stream of electrically charged particles produced by the suns corona
the inner layer of the suns atmosphere
the process by which hydrogen atoms join together to form helium, releasing energy
the outer layer of the suns atmosphere
a dark area of gas on the sun that is cooler than its surroundings
the middle layer of the suns atmosphere
the central part of the sun, where nuclear fusions occur
an explosion of hydrogen gas from the suns surface that occurs when loops in sunspot regions suddenly connect
what is the difference between heliocentric and geocentric models?
what are the 2 factors that combine to keep the planets in orbit?
inertia and gravity
what are the 3 layers of the sun?
photosphere chromosphere and corona
what are the features of the suns surface?
sunspots prominence and solar flares