whats a ferometer
100 years ago
Years are a measurement of time; light years are a measurement of distance. A light year is the distance light travels in one year (in a vacuum).
Well the answer is in the question. A light year is the distance it takes light to travel in one year. If something is a 100 light years away, then it will take light ..........
if you are observing a star 100 light years away, you are looking at it as it was 100 years ago.
How many years in a sentery
Well considering you have put a "period" (.) and not a comma (,) one can only take the question as 100 light years. 100 light years = 5.87849981 × 1014 miles
100 years.100 years.100 years.100 years.100 years.100 years.100 years.100 years.100 years.100 years.100 years.
The Milky Way galaxy is around 100 thousand light-years across from end to end. (A light-year is the distance light travels in a year through the vacuum of space, equal to just under 10 trillion kilometres). It contains around 100 billion stars, many of which are thought to have solar systems of their own.
100 years
Radio waves travel at the speed of light, so radio waves broadcast 100 years ago that were strong enough to reach into space are 100 light-years away.
About 100 light-years in diameter.
100 years.