Location, Location, Location: What I Learned This Week

  • Somewhere in New York's midtown Park Avenue's street numbers reboot and start over. Which means that on a busy day it is possible to find yourself at the right address but the wrong location. 
Transient
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.  
  • While having dinner with friends we began to discuss the Higs Boson discovery and science in general. The conversation then moved to astronomy and the Hubble Deep Field. In the image above all those 3000 bright and not so bright objects are other galaxies.