distance
Stellar Parallax
[/caption] Parallax is the apparent difference in the position (line of sight to) an object, when the object is viewed…
15 years ago
Megaparsec
[/caption] A megaparsec is a million parsecs (mega- is a prefix meaning million; think of megabyte, or megapixel), and as…
15 years ago
How Long is a Light Year?
A light year is the distance light can travel in vacuum in one year's time. This distance is equivalent to…
15 years ago