petimbo Posted August 10, 2013 Share Posted August 10, 2013 This Hubble image, taken by the Advanced Camera for Surveys, shows the central part of merging galaxy cluster Abell 2744, nicknamed Pandora's Cluster. This remarkable object seems to be the result of the collision of at least four separate galaxy clusters. Quote Link to comment Share on other sites More sharing options...
petimbo Posted August 10, 2013 Author Share Posted August 10, 2013 Abell 2744, nicknamed Pandora's Cluster, is a giant galaxy cluster resulting from the simultaneous pile-up of at least four separate, smaller galaxy clusters that took place over a span of 350 million years. The galaxies in the cluster make up less than five percent of its mass. The gas (around 20 percent) is so hot that it shines only in X-rays. Dark matter makes up around 75 percent of the cluster's mass. The image is a composite of separate exposures made by Hubble Space Telescope ACS detectors, the ESO's Very Large Telescope (VLT), and the Chandra ACIS detector. Hubble provides the central, most detailed part of the image, while the VLT, which has a wider field of view, provides the outer parts of the image. A map of the cluster's dark matter distribution has also been applied to the image. The color results from assigning different hues (colors) to each monochromatic image. Distance: 4 billion light-years. In this case, the assigned colors are: Dark Matter Map; blueHST F606W (V); greenChandra X-ray data; red Quote Link to comment Share on other sites More sharing options...
Enrico_sw Posted August 11, 2017 Share Posted August 11, 2017 The Calabash Nebula (which also looks like a crossbow) and is also called the Rotten Egg nebula Nebulae are always surprising... Quote Link to comment Share on other sites More sharing options...
Enrico_sw Posted August 11, 2017 Share Posted August 11, 2017 Polar lights seen from the space. I'd like to see one in reality one day! Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 11, 2017 Share Posted August 11, 2017 3 hours ago, Enrico_sw said: Polar lights seen from the space. I'd like to see one in reality one day! By the bye .... What's the weather forecast in Helix ? Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 11, 2017 Share Posted August 11, 2017 hubblesite.org " Out of the Ordinary .... Out of this World " Supernova 1987A within the Large Magellanic Cloud Awesome ! Quote Link to comment Share on other sites More sharing options...
Enrico_sw Posted August 11, 2017 Share Posted August 11, 2017 8 hours ago, Niels von Wittelsbach said: By the bye .... What's the weather forecast in Helix ? The wheather is probably a bit ionizing there ... However, the one in my profile picture is the Ring Nebula aka M57 (but they do look alike) Another one that I also really like is the butterfly nebula (NGC 6302): Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 11, 2017 Share Posted August 11, 2017 There are some very fine moments in Hubble ! To mark the 26th Birthday the Bubble Nebula NGC 7635 Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 12, 2017 Share Posted August 12, 2017 After 20 years of Saturn study .... Cassini The Grand Finale .... Quote Link to comment Share on other sites More sharing options...
Enrico_sw Posted August 12, 2017 Share Posted August 12, 2017 ^ it was a great mission. It taught many things. They should emphasize the benefits (including economical) of these missions (it cost $3.2B, but the benefits are huge as well). Quote Link to comment Share on other sites More sharing options...
Enrico_sw Posted August 12, 2017 Share Posted August 12, 2017 Jupiter seen by Juno spacecraft (a man seen by his wife in a sense ) Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 13, 2017 Share Posted August 13, 2017 What are you doing at the weekend ? See the Perseid Meteor Shower ! Quote Link to comment Share on other sites More sharing options...
Lyla Posted August 13, 2017 Share Posted August 13, 2017 I am a cancer, muhahahaba Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 16, 2017 Share Posted August 16, 2017 A meteor streaks across the sky. Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 21, 2017 Share Posted August 21, 2017 2017 August 21 Total Solar Eclipse Consider The Corona Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 21, 2017 Share Posted August 21, 2017 A Misty Valley, Perseid Meteors, Stars and The Milky Way. Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 22, 2017 Share Posted August 22, 2017 Carmella Rose " Did any of you guys catch the solar eclipse ? " Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted August 25, 2017 Share Posted August 25, 2017 Diamond Ring in a cloudy sky. Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted September 6, 2017 Share Posted September 6, 2017 I would like to be at the Cassini Team' s breakfast together Tradition. Quote Link to comment Share on other sites More sharing options...
Neils von Zeppelin Posted September 8, 2017 Share Posted September 8, 2017 Cassini Gallery Quote Link to comment Share on other sites More sharing options...
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