Hubble's view of Terzan 9, which the ESA shared on June 13, shows a glittering star-studded scene resembling a "treasure chest crammed with gold," according to a statement from the space agency.įollow Samantha Mathewson on Twitter. The recent observations of Terzan 2 look similar to another globular cluster called Terzan 9, which is located in the constellation Sagittarius near the center of the Milky Way. The end result is a crystal-clear observation, such as this glittering portrait of Terzan 2." "The mirrors inside each instrument also correct for the slight imperfection of Hubble's primary mirror. The findings are published in the journal Nature."Each of the four operational instruments on Hubble is a masterpiece of astronomical engineering in its own right, and contains an intricate array of mirrors and other optical elements to remove any aberrations or optical imperfections from observations, as well as filters which allow astronomers to observe specific wavelength ranges," ESA officials said in the statement. “These stars are also responsible for injecting energy into the turbulent medium from which stars and galaxies are forming.” “ produce the first supernovae that enrich the galaxies with metals and elements such as carbon and oxygen that are necessary for life,” said Norman. There are theoretical predictions, but no direct evidence, of an early generation of stars made only of primordial hydrogen and helium. These stars – the ancestors of those we see in the sky today – formed before the universe was filled with the heavy elements produced by successive generations of massive stars. The planned observations will also allow astronomers to measure the star’s brightness and temperature and give insights into the composition of the earliest generation of stars. This Hubble Space Telescope image shows galaxy NGC 6984, which is located about 200 million light-years from Earth. An alternative possibility, deemed very unlikely, is that it is a dim, nearby brown dwarf. Hubble also examines individual stars in various stages of their evolution. This will allow scientists to definitively confirm that they are looking at a single, very distant star. The observations have been hailed as hugely significant and been prioritised for the first cycle of observations using Nasa’s James Webb Space Telescope, due to begin in June. Light is “ red-shifted” away from its original wavelength as it travels through the expanding universe and so, although Earendel would have been blue if seen from nearby, 12.9bn years ago, it appears a deep red in the Hubble images. The star’s distance was estimated by its colour. “This might be the earliest star we will ever see since the big bang,” said Dr Guillaume Mahler, an astronomer at Durham University and co-author. This image is one of the most photogenic examples of the many turbulent stellar nurseries the NASA/ESA Hubble Space Telescope has observed during its 30-year lifetime. Scientists calculate that Earendel’s brightness is magnified by a factor of thousands – a situation that may not be repeated with other ancient stars within our lifetimes. Hubble orbits about 535 kilometers (332 miles) above Earth. It was launched into orbit by space shuttle Discovery on April 24, 1990. The Hubble Space Telescope is a large telescope in space. This article is part of the NASA Knows (Grades 5-8) series. The cluster’s gravitational pull is so intense that light bends around it, creating a powerful cosmic magnifying glass that amplifies light from distant objects lying behind it. The 'Hubble Ultra Deep Field' shows many galaxies far from Earth. It was only thanks to natural magnification by a huge galaxy cluster, WHL0137-08, which sits between us and Earendel, that astronomers were able to make the detection. At such vast distances, even an entire galaxy is just a smudge of light. But even such a brilliant star would not normally be detectable. Scientists estimate that Earendel, whose name means “morning star” in Old English, is at least 50 times the mass of the Sun and millions of times as bright, placing it among the most massive stars known. Photograph: Space Telescope Science Institute/NASA, ESA, B. NASA press release Id: heic0815e Type: Observation Release date: 5 August 2008, 15:00 Related releases: Size: 2000 x 2000 px.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |