Cosmological Distances

How Far Does Light Travel in a Year?

Light travels at a speed of 299,792,458 m/s (1080 million km/h; 671 million mph), which works out to about 9,460.5…

7 years ago

AGNs As A New Standard Candle?

[/caption] Nope. A standard candle isn't the same red, green, blue, yellow and omni-present pink wax sticks that decorate your…

13 years ago