Hubble Deep Field Surpassed: Ultra Deep Field
March 9, 2004
If you remember the awe of seeing the first Hubble Deep Field image in 1995, check out the new HUDF: Hubble Ultra Deep Field (see also the New Scientist report). The field of view, just one-tenth the size of the full moon, is a composite of 800 images taken for 11.3 days. The 1995 image […]
Superstar Challenges Theory
February 28, 2004
A new record holder has been found for biggest star: LBV 1806-20 in Sagittarius. According to the NewsNotes entry on p. 20 of the April 2004 issue of Sky and Telescope, the star is up to 3 times hotter than the surface of our sun, and has a diameter 200 times as big. […]
Should Cosmologists Get Worried Yet?
January 23, 2004
The unexpected finding of mature galaxies in the early universe (see 01/02/2004) has Robert Irion worried, but he seems surprised the theorists are not. Reporting on last week’s meeting of the American Astronomical Society in the Jan. 23 issue of Science,1 he titles his article, “Early Galaxies Baffle Observers, But Theorists Shrug.” He begins: “It’s […]
Globular Cluster Origins: Where Do We Go From Here?
January 1, 2004
The simple explanation of globular clusters as bundles of ancient stars seems to be in a state of crisis, though the authors of a paper in the Jan. 1 issue of Nature1 try to keep a stiff upper lip. They begin, “Nearly a century after the true nature of galaxies as distant ‘island universes’ was […]
Reality or Hubris in Scientific Claims?
January 20, 2002
51; The amount of trust the public puts in scientific claims stems partly from their incomprehensibility. The claims presented in scientific papers are often so dense and abstruse as to be unapproachable by all but specialists. Undoubtedly many people trust scientists because of their specialized education, their knowledge of mathematics, their special equipment, and their […]