A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion …

A ACCREDITED An educational institution which has been recognized as maintaining standards that qualify graduates for admission to higher, or more specialized, institutions or professional practice.

This activity can be used in conjunction with the StarChild Universe Level 2 information OBJECTIVES: Examine ways of measuring distance Make inferences regarding space travel Identify the distance …

A galaxy contains stars, gas, and dust which are held together as a group by gravity. There may be millions, or even billions, of stars in one galaxy. There are billions of galaxies in the universe. …

The words " solar system " refer to the Sun and all of the objects that travel around it. These objects include planets, natural satellites such as the Moon, the asteroid belt, comets, and meteoroids. Our …

AUDIO: none. VIDEO: Artist's conception of a black hole with swirling accretion disk surrounding it. Jets (perpendicular to the disk) come out of the central black hole. Point of view moves in toward the …

children. Particularly my science teachers because I went into science. But not just science teachers.

AUDIO: none. VIDEO DESCRIPTION: Animation of a cometary fragment with two outgassing areas tumbling through space toward Jupiter. Ahead of it are several other fragments which impact the …

This picture, taken by the Voyager 2 space probe, shows the southern hemisphere of Triton.

VIDEO DESCRIPTION: Video footage of fireball streaking across the sky, breaking up into seperate smaller fireballs. Animation of path of fireball over a map of the Eastern United States. Fireball tracks …