Gravitational Lensing Hubble
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Esahubble nasa suyu et al.
This hubble space telescope photo released feb.
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Gravitational lensing hubble. By combining the power of a natural lens in space with the capability of nasas hubble space telescope astronomers made a surprising discoverythe first example of a compact yet massive fast spinning disk shaped galaxy that stopped making stars only a few billion years after the big bang. Hubble pushed beyond limits to spot clumps of new stars in distant galaxy jul 6 2017 compass and scale image for galaxy cluster sdss j11106459 lensed galaxy sgas j11102006459508. Hubbles data will also provide a basis and guide for the james webb space telescope whose infrared observations will push yet farther into the cosmos. Observations of the universe generally agree well with the lcdm model but an emerging exception is the hubble constant h 0 the universes present rate of expansion.
This image from the nasaesa hubble space te. Hubbles sensitivity and high resolution allow it to see faint and distant gravitational lenses that cannot be detected with ground based telescopes whose images are blurred by the earths atmosphere. When combined with measurements of the cosmic microwave background a reflection of the spatial. Among their discoveries is that the distant galaxys stars are very old meaning that galaxies probably formed earlier in cosmic history than we first thought.
This newly released hubble image uses gravitational lensing to get a better look at distant galaxy clusters. The gravitational lensing effect means that they have been able to determine fascinating insights about the galaxy that would not normally be visible even with hubble. Galaxy clusters are some of the most massive structures that can be found in the universe large groups of galaxies bound together by gravity. V h 0 das late as the mid 1990s the value of the proportionality constant h 0 the hubble constant was known only to be somewhere between 50 and 90 kms per megaparsec see the article by mario livio and adam riess physics today october.
In 1929 edwin hubble confirmed that galaxies are receding from us with a speed proportional to their distance. Gravitational lensing measurements push hubble constant discrepancy past 5s. Gravitational lensing probes the distribution of matter in galaxies and clusters of galaxies and enables observations of the distant universe.