Saturday, November 14, 2009

Thank you Hubble!!!


It is a long time, that I am not writing in Tiyezerk., but undoubtedly I do physics, specially cosmology continuously.
Anyhow I decided to write more frequently here.
Today I was asked what are the main scientific discoveries achieved by Hubble space base telescope.
In the first moment I can't tell much about it, obviously because we owe too much to Hubble telescope, and cosmology really have a rebirth from the discoveries of Hubble telescope.
Anyhow later, I decided to categorize some of the most achievements of it as below:

1)Measurement of Cepheid variable and determination of the Hubble constant, which shows the rate of the expantion of the universe and indirectly determine the age of universe.
2)Astronomers from the High-z Supernova Search Team directed Riess and the Supernova Cosmology Project directed Perlmuter used the telescope to observe distant supernovae and uncovered evidence that, far from decelerating under the influence of gravity, the expansion of the universe may in fact be accelerating and that is the main fingerprint of unknown component of universe.
3)High quality optical spectra and images provide a valuable data for studying the relation of nuclei of galaxies and black holes.
4)Although Hubble telescope is the optical eye of earth, it also detect the optical effect of cosmological events which their peak are in other wavelenght like gamma ray burst.
5)Ultra deep Hubble image focus the telescope and got the furthest optical image of universe, which I wrote about it in a post later.
6)Detection of some objects or events in solar system, like the The collision of Comet Shoemaker-Levy 9 with Jupiter in 1994 or the detection of Eris and Pluto
7)Hubble data on proto-planetary disks (proplyds) in the Orion Nebula
and many more...
thanks to Hubble

Shan Baghramian