The total amount of exposure time was 11.3 days, taken between Sept. The image required 800 exposures taken over the course of 400 Hubble orbits around Earth. Red represents near-infrared light, which is invisible to the human eye, such as the red glow of dust-enshrouded galaxies. In this image, blue and green correspond to colors that can be seen by the human eye, such as hot, young, blue stars and the glow of Sun-like stars in the disks of galaxies. Located in the constellation Fornax, the region is so empty that only a handful of stars within the Milky Way galaxy can be seen in the image.
Hubble space telescope images north star Patch#
In ground-based photographs, the patch of sky in which the galaxies reside (just one-tenth the diameter of the full Moon) is largely empty. Peering into the Ultra Deep Field is like looking through an eight-foot-long soda straw. The Ultra Deep Field observations, taken by the Advanced Camera for Surveys, represent a narrow, deep view of the cosmos.
Order and structure were just beginning to emerge. These oddball galaxies chronicle a period when the universe was younger and more chaotic. Some look like toothpicks others like links on a bracelet. In vibrant contrast to the rich harvest of classic spiral and elliptical galaxies, there is a zoo of oddball galaxies littering the field. The nearest galaxies - the larger, brighter, well-defined spirals and ellipticals - thrived about 1 billion years ago, when the cosmos was 13 billion years old. The smallest, reddest galaxies, about 100, may be among the most distant known, existing when the universe was just 800 million years old. The snapshot includes galaxies of various ages, sizes, shapes, and colors. Called the Hubble Ultra Deep Field, this galaxy-studded view represents a "deep" core sample of the universe, cutting across billions of light-years. This view of nearly 10,000 galaxies is the deepest visible-light image of the cosmos. More information and documentation on HST can be found at the HST website.Galaxies, galaxies everywhere - as far as NASA's Hubble Space Telescope can see. No future servicing missions are planned at this time. Since then, servicing missions have regularly provided opportunities to repair aging and failed equipment as well as incorporate new technologies in the telescope, especially in the Science Instruments that are the heart of its operations. HST was on a three-year cycle of on-orbit servicing, with servicing missions in December 1993, February 1997, December 1999, March 2002 and May 2009. The STS-61 (Endeavour) mission of December 1993 corrected the effects of spherical aberration and fully restored the functionality of HST. In the infrared portion of the spectrum, the Earth’s atmosphere adds a great deal of background, which is absent in Hubble observations.Īfter launch, scientists discovered spherical aberration in HST's main mirror, which resulted in fuzzy images.
These science instruments can produce high-resolution images and spectra of astronomical objects and can also observe ultraviolet radiation, which is blocked by the atmosphere and therefore unavailable to ground-based telescopes. The Hubble Space Telescope (HST) is a 2.4-meter reflecting telescope, which was deployed in low-Earth orbit (600 kilometers) by the crew of the space shuttle Discovery (STS-31) on 25 April 1990. HST was designed to be a different type of mission for NASA - a long-term, space-based observatory with regular servicing missions. HST's current complement of science instruments includes three cameras (ACS, WFC3/UVIS, and WFC3/IR), two spectrographs (COS and STIS), and fine guidance sensors (FGS).
0 kommentar(er)
