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  1. What is the solar cycle? - NASA

    As the solar cycle progresses, newer sunspots appear closer and closer to the equator. The last sunspots of the solar cycle appear at an average latitude of about 5 - 10 degrees. During all …

  2. StarChild: Multidisciplinary Solar System Activities: Moonlight …

    The Moon passes through a cycle of eight phases which repeats itself every 29.5 days. There is no definite starting point for the cycle, but phases follow one behind the other in a strict order. …

  3. StarChild: A Learning Center for Young Astronomers - NASA

    May 14, 2018 · StarChild is a learning center for young astronomers ages 5-13 to learn about the solar system, the Milky Way galaxy, and the universe beyond. Use the links above to explore …

  4. Why is Polaris the North Star? - NASA

    Watch an animation showing the precession of Earth Image and Animation by Robert Simmon, NASA GSFC

  5. Moon Glow - NASA

    This demonstration will illustrate why the Moon has so many different looks within that 29-day period known as the lunar cycle. Prior to or after the demonstration, allow the students to go …

  6. StarChild: The Sun - NASA

    Events which occur on the Sun include sunspots, solar flares, solar wind, and solar prominences. Sunspots are magnetic storms on the photosphere which appear as dark areas. Sunspots …

  7. StarChild: Comets - NASA

    Scientists believe that comets are the debris left from the solar nebula which condensed to form the Sun and planets in our solar system. Most comets are thought to originate in a huge cloud …

  8. What are the phases of the Moon? - NASA

    If we could magically look down on our solar system, we would see that the half of the Moon facing the Sun is always lit. But the lit side does not always face the Earth! As the Moon circles …

  9. Galileo Galilei - NASA

    Using his telescope, Galileo made many observations of our Solar System. He came to believe that the idea that the Sun and other planets orbited around the Earth was not correct. Galileo …

  10. StarChild: The Asteroid Belt - NASA

    An asteroid is a rocky body in space which may be only a few hundred feet wide or it may be several hundred miles wide. They are considered to be debris left over from the formation of …