The Hubble Space Telescope revolves around the Earth in space and scans the sky with clarity and exactitude, which Earth’s telescopes can not touch. A powerful astronomical instrument is determined to make important discoveries. A space telescope will make revolutionary breakthroughs. In April, the Hubble Space Telescope was 20 years old. Here are the five most important contributions to the development of astronomy.
Hubble Space Telescope is a robotic telescope placed in the outer part of the atmosphere in a circular orbit around the Earth at 593 Km from the sea, with an orbital period of 96 to 97 minutes and a speed of 28,000 Km / h. was launched in orbit on April 24, 1990 as a NASA project becoming one of the most important tools in the history of astronomy. Its length is 13.2 m and its diameter is 4.2 m. The telescope can obtain images with a higher optical resolution of 0.1 arcsec. The space telescope was named after the astronomer Edwin Hubble, who in 1929 discovered the expansion of the Universe, a dilation similar to the growth of a balloon. His activity made it possible to develop the theory that the universe existed with the primary explosion – the Big Bang. The Hubble Space Telescope cost 1.5 billion US dollars. From the artificial heavenly bodies built to date, it was the most expensive, the heaviest and the largest. Its length is 13.1 meters just like a wagon), weight 11.5 tons (as many as ten cars). Researchers work on the computer, the image of a constellation, received from the Hubble Space Telescope; only the opaque red spot can be seen on the nearby monitor, and the next one shows the result processed by the computer. Astronomers have compiled a catalog of 15 million stars that should be identified by the Hubble Space Telescope. For this, 1500 images have been processed on the computer (these together represent the entire surface of the celestial vault.) The telescope can obtain images with a higher optical resolution of 0.1 arcsec.
The universe’s expansion rate, called the “Hubble constant”, can only be determined by observing a certain type of star. They have the same intrinsic glare and are found in all galaxies, even the most indefinite. Hubble could see such stars at a distance of 92 million light years, a thing that no other telescope can do. It was thus found that the expansion rate was 74.2 ± 3.6 km / s / megaparsec. From here it was determined and how long it took the Universe to reach its present size, namely 13.75 ± 0.11 billion years.
Astronomers’ calculations show that the speed of expansion of the universe must decrease over time, but observations made with the Hubble telescope show that it is rising. The discovery was made by observing the supernovae in the distant galaxies, these being so weak that the glare that only the Hubble telescope can observe. It has been found that their shine is less than they should, a sign that the speed of expansion of the Universe increases instead of diminishing. The force that defeats gravity has been called the “dark energy” and has been seen to account for 73% of the total density of matter in the Universe. Her nature still remains a mystery.