An acceptable range for the estimated number of galaxies in the universe is between 100 and 200 billion, according to astronomer Mario Livio.

The Hubble Space Telescope’s successor has suffered another 5-8 month delay. The Webb Space telescope has entered the final phases of testing, but delays caused by integration difficulties have pushed back the launch date. The complicated folding of the sunshield is the culprit, and there’s 8 billion dollars on the line.