Speed of light they appeared 13 billion years ago, when the universe was less than a billion years old. The fact that more distant objects appear to be younger, due to the finite speed of light, allows astronomers to infer the evolution of stars, of galaxies, and of the universe itself. Astronomical distances are sometimes expressed in light-years, especially in popular science publications and media. A light-year is the distance light travels in one year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri,
1, 2, 3, Red Light (song) 1, 2, 3, Red Light (song) "1, 2, 3, Red Light" is a song written by Sal Trimachi and Bobbi Trimachi and was recorded by 1910 Fruitgum Company for their 1968 album, "1, 2, 3, Red Light". The song charted highest in Canada, going to number 1 on the "RPM 100" national singles chart in 1968. In the same year in the US, it went to number 5 on the "Billboard" Hot 100 and was on the charts for 13 weeks. The song went to number 2 in South Africa, number 3 on the New Zealand charts, and in Australia