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M100 and Hubble’s Repair

When Hubble was first placed in space, a issue with it’s mirrors blurred the telescopes images. A space walk to fix the issue was a huge success, and a crystal clear image of M100 Galaxy sprung into life.

Fast forward over 25 years later, and an upgrade carried out in 2009 to add the Hubble’s Wide Field Camera 3, took a further leap in quality.

M100 is 55 Million light years away and part of the Virgo super cluster of galaxies (which our Milky Way is also a member) with the massive M87 elliptical galaxy making up one of the main galaxies in that group (of recent Black Hole image fame !).

Source : https://astronomynow.com/2020/06/15/hubbles-before-and-more-recent-after-image-of-m100/

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Abell 3827: Cannibal Cluster Gravitational Lens via NASA https://ift.tt/3mpzq5m

Is that one galaxy or three? Toward the right of the featured Hubble image of the massive galaxy cluster Abell 3827 is what appears to be a most unusual galaxy – curved and with three centers. A detailed analysis, however, finds that these are three images of the same background galaxy – and that there are at least four more images. Light we see from the single background blue galaxy takes multiple paths through the complex gravity of the cluster, just like a single distant light can take multiple paths through the stem of a wine glass. Studying how clusters like Abell 3827 and their component galaxies deflect distant light gives information about how mass and dark matter are distributed. Abell 3827 is so distant, having a redshift of 0.1, that the light we see from it left about 1.3 billion years ago – before dinosaurs roamed the Earth. Therefore, the cluster’s central galaxies have now surely all coalesced – in a feast of galactic cannibalism – into one huge galaxy near the cluster’s center.

(Published August 23, 2021)

2 major explosions kill 10, injure several in Lebanon capital Beirut; scary visuals emerge Two major explosions rocked Lebanese capital Beirut on Tuesday. At least 10 people were reported dead in the explosions, local security and medical sources told Reuters. Join our Space family💙 🔔And turn on post notification.🔔 - Kindly follow @_space___lover_  for more interesting posts in future. • Double TAP ❤️ for more.... Follow @_space___lover_   to Learn New Amazing Stuff Everyday - - Do you agree with this post? 💯 ❗️Follow us    for more Space Science Facts❗️ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ Double tap ❤️ Share More👇 Follow us for more 🌍 -tag:-) #nasa  #galaxies #spacetravel #universes #earthplanet #nasabeyond #spacescience #futures #alieninvasion #elonmusk #bairutexplosion #nasawebb  #beirut  #dangeroustour #mars #spacelover #plutoretrograde #tomcruire  #physicsisfun #theoreticalphysi̇cs (at Beirut, Lebanon) https://www.instagram.com/p/CDekB_VHh7O/?igshid=180pgx1j83rio

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Astronomers usually cannot tell the age of an individual star. There are certain stars that we know are very young, and others that are very old, but for most stars we cannot tell. When we have a large group of stars, however, we can tell its age. This is possible because all of the stars in a cluster are presumed to have begun their life at approximately the same time. After a relatively brief time (in 'star time,' that is--we are talking thousands to millions of years here) stars reach the adult phase of their life, which we call the main sequence phase. The length of time a star spends in the main sequence phase depends on its mass. "Constructing a plot, called the HR diagram, of the stars in the cluster, scientists can determine the mass of the stars that are just ending this phase and moving on to the next phase of their life, the red giant phase. Computer models allow us to predict how old a star of that mass must be to be at that juncture of its life, and hence to estimate the age of the cluster. Recently, this procedure has come under close scrutiny because that age it gives for the oldest star clusters in our Milky Way seems to be older than the age of the universe derived from the most recent Hubble Space Telescope data." Asked me this 🔱. @nevi2349 (at SPACE.) https://www.instagram.com/p/CEbzbW9jabB/?igshid=ntt5zye5pk7