An image as birthday present. It may seem a worthless present, but the photo shows bit groups of stars that are just some millions of years old; they are very common in other galaxies, but they are extremely rare in the Milky Way. In addition, one of the NASA space telescope, Hubble, which celebrates 25 years in the space, took this photo. Westerlund 2 is one of the richest mass, it is just 2m years old, and it contains many big starts inside. This is just one of the beautiful pictures sent to the earth thanks to Hubble.
Exploding supernovae starts falling in black holes, galaxies, binary system stars, white dwarfs, asteroids and nebulas. These are some of the images Hubble sent to the earth and revolutionizing completely our knowledge of the universe.
It was launched on April 24th, 1990, with the Space Shuttle Discovery program led by NASA and European Space Agency (ESA). The space telescope is in the outer layer of the atmosphere, about 560km high and it orbits around the earth. It is in favored position because it is outside the atmosphere therefore images are not distorted by electromagnetic radiations. Moreover, it is able to capture space depth five times better that telescopes ion earth.
One of the most touching and moving photos Hubble as ever taken is the one showing the three pillars of creation, three gas “tower”, called Messier 16. It was first taken in 1995 and in January 2015, 20 years later. Thanks to new tools on board, as the Wide Field Camera 3 working since 2009, it was possible to obtain more details on its structure.
In order to celebrate the successful space telescope, NASA and ESA created and released a video “Expect the Unexpected” showing breathtaking photos. The footage is just 5 minutes and shows the most important scientific steps. For example, it took the photo of very far exploding supernovae that brought to the theory of a “mysterious” energy, it is called this way because it is very dark. This revolutionary discovery earned a Nobel prize for Physics.
Translation provided by Mary Ann D’Costa