What is a light-year and how is it used?? - NASA
Answer: 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 …
Just How Big is this Place - NASA
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 …
StarChild: Glossary - NASA
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StarChild: Galaxies - NASA
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. …
NASA
If you weren't an astronomer what would you be? I very much enjoy teaching. I'm not sure I could be a schoolteacher, but if I could find some way of teaching people something, I think that's what I would do.
StarChild: A Learning Center for Young Astronomers
children. Particularly my science teachers because I went into science. But not just science teachers.
StarChild: The Solar System - NASA
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 …
StarChild: A Learning Center for Young Astronomers
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 …
ROSAT - starchild.gsfc.nasa.gov
The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), within the Astrophysics Science Division (ASD) at NASA/ GSFC.
NASA
AUDIO: [applause fading] President Kennedy: I believe that this nation should commit itself to achieving the goal before this decade is out of landing a man on the Moon and returning him safely to the …