Astronomy

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.

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; blue
HST F606W (V); green
Chandra X-ray data; red

The Calabash Nebula (which also looks like a crossbow) and is also called the Rotten Egg nebula

Nebulae are always surprising...

Polar lights seen from the space. I'd like to see one in reality one day!

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 ?

hubblesite.org    " Out of the Ordinary .... Out of this World "

Supernova 1987A within the Large Magellanic Cloud

Awesome !

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):

There are some very fine moments in Hubble !

To mark the 26th Birthday the Bubble Nebula NGC 7635

After 20 years of Saturn study .... Cassini The Grand Finale ....

^ 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).

Jupiter seen by Juno spacecraft (a man seen by his wife in a sense )

What are you doing at the weekend ?

See the Perseid Meteor Shower !

I am a cancer, muhahahaba

A meteor streaks across the sky.

2017 August 21 Total Solar Eclipse

Consider The Corona

A Misty Valley, Perseid Meteors, Stars and The Milky Way.

Carmella Rose " Did any of you guys catch the solar eclipse ? "

Diamond Ring in a cloudy sky.

I would like to be at the Cassini Team' s breakfast together Tradition.

Cassini Gallery