AAS Denver 2004 Meeting. Annual AAS meeting is held this year in Denver, Colorado. As usual new discoveries are announced there. Here are some of them:

- distances of stars of the Pleiades were announced to have been further confirmed being of the usual value. A controvery had arisen from the fact that the European ESA Hipparcos satellite had found them nearer to Earth when it had performed its sky survey. A previous study had already seen that Pleiades stars were at the distance which had been determined previously to Hipparcos
- Spitzer Space Telescope released ultra-deep images, reaching distances of redshifts 6 or more. Spitzer Space Telescope images were confronted to images working in other wavelengths taken by the two other NASA space telescopes (Hubble, in the visible; Chandra, in the X-rays). They reveal far distant black holes lying inside active galaxies of the early Universe
- an examination of objects of the recently released Hubble Ultra-Deep Field showed that galaxies found when Universe was only about one billion years old are strikingly similar to what they are later on in the Universe history. Far away galaxies were expected to be far much bluer due to an abundance of forming stars. It is not the case. Many of these young galaxies were too confirmed to be interacting. Mergers are on the mechanisms for galaxies to grow
- the Veil Nebula, in the constellation of the Swan, has been found less than 1,900 light-years away as until now it was assumed at at least 2,500 light-years. Measurement was refined from previous studies, determining the distance of a star which was found lying behind the nebula