2. Light travels at 186,000 miles per second. A light-year is the distance that light travels in one year. Multiply the number of seconds in one year by the number of kilometers (or miles) that light travels in one second, and the result is a light -year. A light year is about 9.5 trillion kilometers or 5.88 trillion miles.

3. What does “B” mean?

4. What is Gliese 229B?

5. EarthSky // FAQsTonight // Astronomy Essentials By Bruce McClure Dec 15, 2011FAQsTonightAstronomy EssentialsBruce McClure How far is a light-year? Stars other than our sun are so far distant that astronomers refer to their distances not in terms of kilometers or miles – but in light-years. Light is the fastest-moving stuff in the universe. It travels at an incredible 300,000 kilometers (186,000 miles) per second. That’s very fast. If you could travel at the speed of light, you would be able to circle the Earth’s equator about 7.5 times in just one second! A light-second is the distance light travels in one second, or 7.5 times the distance around Earth’s equator. A light-year is the distance light travels in one year. How far is that? Multiply the number of seconds in one year by the number of kilometers (or miles) that light travels in one second, and there you have it: one light-year. It’s about 9.5 trillion kilometers (5.88 trillion miles).

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7. Just for fun!

9. Time to watch stuff happen.

10. Gliese is 1/100,000 of the sun's luminosity and 20 to 50 times the mass of Jupiter.

11. Lepus is visible at latitudes between +63° and −90°. It is below the constellation Orion.

14. Sources: http://www.windows2universe.org/the_universe/gliese229.html http://www.definitions.net/definition/binary http://hubblesite.org/newscenter/archive/releases/1995/48 http://earthsky.org/astronomy-essentials/how-far-is-a-light-year http://www2.le.ac.uk/departments/physics/research/xroa/astrophy sics-1/red-and-brown-dwarfs http://www.windows2universe.org/the_universe/gliese229.html http://www.definitions.net/definition/binary http://hubblesite.org/newscenter/archive/releases/1995/48 http://earthsky.org/astronomy-essentials/how-far-is-a-light-year http://www2.le.ac.uk/departments/physics/research/xroa/astrophy sics-1/red-and-brown-dwarfs