Read More. I'm sixteen years old. Young, yes, but I have had the shingles. It started off as a just a pain on the ribs underneath my left boob and when it started to turn into a rash about five days later, I went to my school nurse and explained. She immediately sent me home and that day I went to the doctor.
If you assume that the XDF is a typical region of outer space, you can calculate how many XDFs it would take to fill the entire night sky; itâs about 32 million. Multiply by the number of galaxies you find in the XDFâwhich is around 5,500âand thatâs how we arrive at 176 billion galaxies, at least, in the Universe.
Previously, as of July 2015, EGSY8p7 was the most distant known galaxy, estimated to have a light travel distance of 13.2 billion light-years away. Approximately 170 billion (1.7 Ã 1011) to 200 billion (2.0 Ã 1011), or, more recently, at least 2 trillion galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs (or megaparsecs). The space between galaxies is filled with a tenuous gas having an average density of less than one atom per cubic meter.