Free Republic
Browse · Search
Topics · Post Article

Skip to comments.

Shapley Supercluster - A Cosmic Giant (Largest Cosmic Structure in Local Universe)
SpaceRef ^ | October 21, 2013 | Keith Cowling

Posted on 10/22/2013 6:13:52 PM PDT by lbryce

Shapely Supercluster

While scanning the sky for the oldest cosmic light, ESA's Planck satellite has captured snapshots of some of the largest objects populating the Universe today: galaxy clusters and superclusters.

Several hundred galaxies and the huge amounts of gas that permeate them are depicted in this view of the core of the Shapley Supercluster, the largest cosmic structure in the local Universe.

The supercluster was discovered in the 1930s by American astronomer Harlow Shapley, as a remarkable concentration of galaxies in the Centaurus constellation.

Boasting more than 8000 galaxies and with a total mass more than ten million billion times the mass of the Sun, it is the most massive structure within a distance of about a billion light-years from our Milky Way Galaxy.

The hot gas pervading galaxy clusters shines brightly in X-rays, but it is also visible at microwave wavelengths, which Planck sees as a distinctive signature in the Cosmic Microwave Background - the afterglow of the Big Bang.

Looking for this signature - called the Sunyaev-Zel'dovich effect - Planck has already spotted more than 1000 galaxy clusters, including several superclusters and pairs of interacting clusters.

This composite image of the core of the Shapley Supercluster combines the gas detected with Planck at large scales between the members of the supercluster (shown in blue) with that detected in X-rays within the galaxy clusters of Shapley using the Rosat satellite (pink), as well as a view of its rich population of galaxies as observed at visible wavelengths in the Digitised Sky Survey.

The largest pink blobs of X-rays identify the two galaxy clusters Abell 3558 on the right and Abell 3562 on the left, as well as a couple of smaller groups between them.

The image measures 3.2 x 1.8 square degrees and shows the central portion of the Shapley Supercluster. It was produced by reconstructing the Sunyaev-Zel'dovich effect from the Planck frequency maps, and was first published in a Planck Collaboration paper in March 2013.

TOPICS: Miscellaneous; News/Current Events
KEYWORDS: astronomy; esa; plancksatellite

1 posted on 10/22/2013 6:13:52 PM PDT by lbryce
[ Post Reply | Private Reply | View Replies]

To: SunkenCiv

For the APOD Addicts.

2 posted on 10/22/2013 6:18:06 PM PDT by Squawk 8888 (I'd give up chocolate but I'm no quitter)
[ Post Reply | Private Reply | To 1 | View Replies]

To: lbryce

What a Cluster!

3 posted on 10/22/2013 6:19:53 PM PDT by Cvengr (Adversity in life and death is inevitable. Thru faith in Christ, stress is optional.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: lbryce

Watching the science channel now. They were talking about the galaxy clusters and saying the largest known supercluster is more than a billion light years across.

4 posted on 10/22/2013 6:25:11 PM PDT by cripplecreek (REMEMBER THE RIVER RAISIN!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: lbryce

I love how they give the mass is the super cluster in terms of the mass is the sun. It’s like giving the distance to Pluto in feet.

5 posted on 10/22/2013 8:15:11 PM PDT by Cymbaline ("Allahu Akbar": Arabic for "Nothing To See Here" - Mark Steyn)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Cymbaline; All

“MANY a hearth upon our dark globe sighs after many a vanish’d face,
Many a planet by many a sun may roll with a dust of a vanish’d race.

Raving politics, never at rest—as this poor earth’s pale history runs,—
What is it all but a trouble of ants in the gleam of a million million of suns?” Tennyson

6 posted on 10/22/2013 9:29:48 PM PDT by Names Ash Housewares ( Refusing to kneel before the "messiah".)
[ Post Reply | Private Reply | To 5 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794 is powered by software copyright 2000-2008 John Robinson