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  1. starchild.gsfc.nasa.gov › docs › StarChildWhat causes a "falling star"? - NASA

    A "falling star" or a "shooting star" is a meteor, a trail of light caused by a meteoroid burning up in the atmosphere. Learn about meteor showers, the names and dates of annual events, and the difference between meteors and meteorites.

  2. starchild.gsfc.nasa.gov › docs › StarChildStarChild: Meteoroids - NASA

    Learn about meteoroids, the pieces of stony or metallic debris that travel in outer space and sometimes enter the Earth's atmosphere. Find out how they become meteors, meteorites, and meteor showers, and see some examples and images.

  3. starchild.gsfc.nasa.gov › docs › StarChildStarChild: Meteoroids - NASA

    Learn what a meteoroid is and how it becomes a meteor and a meteorite. Find out the difference between a meteor and a falling star, and see examples of meteoroids from the asteroid belt, the Moon and Mars.

  4. starchild.gsfc.nasa.gov › docs › StarChildWhy does the Sun rise in the east and set in the west? - NASA

    The web page explains that Earth's rotation on its axis causes the Sun, the Moon, the planets, and the stars to rise in the east and set in the west. It also discusses how human beings have no ability to tell absolute motion and how Earth's speed varies depending on its location.

  5. starchild.gsfc.nasa.gov › docs › StarChildWhy do stars twinkle? - NASA

    Stars twinkle because of the movement of air in Earth's atmosphere, which bends the starlight slightly. The effect is more noticeable for stars near the horizon than for stars higher in the sky.

  6. starchild.gsfc.nasa.gov › docs › StarChildWhat causes fireballs in the sky? - NASA

    Fireballs are big meteors that burn up in the atmosphere. Learn about the causes, frequency, and effects of fireballs, and see a photo of a meteorite from the "Chicago Fireball" of 2003.

  7. starchild.gsfc.nasa.gov › docs › StarChildStarChild: Stars - NASA

    Learn how stars are born, change and die in a nebula. A protostar is the first stage of a star's life, when it reaches 15 million degrees Celsius and glows by nuclear fusion.

  8. starchild.gsfc.nasa.gov › docs › StarChildDo stars last forever? - NASA

    No, stars are born, live, and die. The lifetime of a star depends on its mass and how it uses its nuclear fuel. Learn more about the life cycle of a star and see a table of typical lifetimes.

  9. starchild.gsfc.nasa.govStarChild: A Learning Center for Young Astronomers - NASA

    May 14, 2018 · StarChild is a NASA-sponsored site that offers fun and educational activities for kids ages 5-13 to learn about astronomy. Explore the solar system, the Milky Way galaxy, and the universe beyond with topics, games, and glossary.

  10. starchild.gsfc.nasa.gov › docs › StarChildStarChild Question of the Month for April 2001 - NASA

    Learn the difference between the sidereal and synodic periods of the Moon, and how they relate to the lunar phases and the Earth's orbit. The sidereal period is 27.3 days, and the synodic period is 29.5 days.