Caught in the Cosmic Web - Dark Matter Structure Revealed by Hubble Spac...

   



Caught in the Cosmic Web - Dark Matter Structure Revealed by Hubble Spac...

Δημοσιεύθηκε στις 16 Οκτ 2012

http://www.facebook.com/ScienceReason
... Dark matter filament studied in 3D for the first time! NASA/ESA
Hubblecast 58: "Caught in the Cosmic Web - Dark Matter Structure
Revealed by Hubble Space Telescope".

In this episode of the
Hubblecast, Joe Liske (aka Dr J) shows how a team of astronomers has
used Hubble and a battery of other telescopes to discover the secrets of
massive galaxy cluster MACS J0717. They have found that an invisible
filament of dark matter extends out of the cluster. This is our first
direct glimpse of the shape of the scaffolding that gives the Universe
its structure.

---
Please subscribe to Science & Reason:
• http://www.youtube.com/Best0fScience
• http://www.youtube.com/ScienceTV
• http://www.youtube.com/FFreeThinker
• http://www.youtube.com/RationalHumanism
---

Astronomers
using the NASA/ESA Hubble Space Telescope have studied a giant filament
of dark matter in 3D for the first time. Extending 60 million
light-years from one of the most massive galaxy clusters known, the
filament is part of the cosmic web that constitutes the large-scale
structure of the Universe, and is a leftover of the very first moments
after the Big Bang. If the high mass measured for the filament is
representative of the rest of the Universe, then these structures may
contain more than half of all the mass in the Universe.

The
theory of the Big Bang predicts that variations in the density of matter
in the very first moments of the Universe led the bulk of the matter in
the cosmos to condense into a web of tangled filaments. This view is
supported by computer simulations of cosmic evolution, which suggest
that the Universe is structured like a web, with long filaments that
connect to each other at the locations of massive galaxy clusters.
However, these filaments, although vast, are made mainly of dark matter,
which is incredibly difficult to observe.

The first convincing
identification of a section of one of these filaments was made earlier
this year. Now a team of astronomers has gone further by probing a
filament's structure in three dimensions. Seeing a filament in 3D
eliminates many of the pitfalls that come from studying the flat image
of such a structure.

• http://www.spacetelescope.org/news/he...

---

Tags:
caught cosmic web "dark matter" "dark energy" galaxy cluster universe
astronomers nasa esa hubble space telescope structures mass "big bang"
theory







ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 8/3/2014