What is a light-year and how is it used?? - NASA
StarChild Question of the Month for March 2000 Question: What is a and how is it used? Answer: A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a …
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
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.
StarChild: Galaxies - NASA
A galaxy is a cluster of stars, dust, and gas which is held together by gravity. Galaxies are scattered throughout the universe and they vary greatly in size. A galaxy may be alone or it may be in a large …
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. …
StarChild: The Milky Way - NASA
Our Sun is a star in the Milky Way Galaxy. If you were looking down on the Milky Way, it would look like a large pinwheel rotating in space. Our Galaxy is a spiral galaxy that formed approximately 14 billion …
Cepheids - NASA
Cepheids Cepheids, also called Cepheid Variables, are stars which brigthen and dim periodically. This behavior allows them to be used as cosmic yardsticks out to distances of a few tens of millions of …
NASA
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 …
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.
NASA
Do you have any pets? Sadly, no. I was brought up in a household that always had a dog and lots and lots of cats and I love them. Whenever I go to visit, if there's a dog or a cat, I talk to the dogs or the …