http://truthufo.blogspot.com/: The Spitzer space telescope

Thursday, 21 August 2008

The Spitzer space telescope

The exoplanets type land as if it was raining!

The study of the infrared emission of hundreds of solar-type stars suggests that most of them can be surrounded by planets similar to ours. Some astronomers are even convinced that the majority of stars, if not all, are surrounded by a planetary system.
The poll in question was conducted by the Spitzer infrared space telescope at NASA who studied in a specific wavelength of infrared about 300 stars and which left little doubt about the likely presence of planets or planets training.

The comments made in this wavelength show that most of the dust has a temperature of about 100 to 300 Kelvin. Yet, in our Solar System, this temperature range corresponds to a region that extends from Earth to Saturn. It shows that 62% of stars and have studied the matter needed to form planets where water can remain in the liquid state.

Why infrared, simply because the ultraviolet and visible light emitted by the stars is absorbed by dust that réémet in the form of infrared radiation. Should we recall that dust is the material at the base of everything and "readily" observable? It plays a vital role in all stages of the formation of planets and can therefore be observed in more or less good conditions.

Formation of planets

Indeed, for millions of years after the formation of stars, a disk of dust, gas and ice begins to revolve around the star. Thereafter, and if conditions permit (which seems to be the case whenever) processes that are taking place lead to the formation of planetesimals, protoplanètes and planets and the procession of other comets and asteroids. As a consequence of dry and to remove the original disc. As a general rule, then it leaves room for a disk of debris that will eventually also dissipate.

The Spitzer space telescope

The Spitzer space telescope was launched into orbit on August 25, 2003 by a Delta II rocket Boeing from the U.S. base at Cape Canaveral (Kennedy Space Center). In a lifetime of at least 2 ½ years, and increased to 5, Spitzer complete range of large telescopes NASA space as Hubble, Chandra and Compton (orbited in 2000).

The telescope has a mirror of 85 centimetres and three cryogenic cooling instruments: a camera operating in the near and medium-infrared spectrograph to analyze all wavelengths of infrared and a photometer for collecting information on the range of infrared remote.

Since its heliocentric orbit, back to Sun, he studied in particular the formation of stars and planets. He observes the universe as it was there billions of years and helps scientists to determine how and when the first objects of which were formed, and their composition. Spitzer is able to discover objects never seen before because overshadowed by interstellar dust as stars and galaxies more distant. It observes the coldest objects in the Solar System (external planets, asteroids and other small bodies) and the present dust disks around young stars (proto-planetary disk)