stars, nebula, galaxies

September goodies in the sky

A few pictures between the high clouds this evening here in Utrecht. This is M15, close to Enif in the constellation Pegasus. It’s a globular cluster about 33,000 light years from Earth. C8, Nikon D90,…



Identical twins are rare in the universe

The Milky Way seems to be a rather mundane chap in the great order of universal things. Plenty of galaxies the same size, the same shape, the same composition. But according to researchers the presence…


Take a puff

Just as René Magritte wrote “This is not a pipe” on his famous painting, this is also not a pipe. It is however a picture of part of a vast dark cloud of interstellar dust…


Pre-supernova?

Type Ia supernovae are violent stellar explosions. Observations of their brightness are used to determine distances in the universe and have shown scientists that the universe is expanding at an accelerating rate. But there is…


Like to have a big, hot mama around?

A new study using ESO’s Very Large Telescope (VLT) has shown that most very bright high-mass stars, which drive the evolution of galaxies, do not live alone. Almost three quarters of these stars are found…


Make-a-wikibook

Wikipedia has an incredible cool feature. If you want a collection of articles, you can often make a PDF-file into a book. Take this page, List of nearest stars. It not only gives you a…