. Solar Energy News .




.
STELLAR CHEMISTRY
A New View of an Icon
by Staff Writers
Paris (ESA) Jan 18, 2012

Combining almost opposite ends of the electromagnetic spectrum, this composite of the Herschel in far-infrared and XMM-Newton's X-ray images shows how the hot young stars detected by the X-ray observations are sculpting and interacting with the surrounding ultra-cool gas and dust, which, at only a few degrees above absolute zero, is the critical material for star formation itself. Both wavelengths would be blocked by Earth's atmosphere, so are critical to our understanding of the lifecycle of stars. Credits: far-infrared: ESA/Herschel/PACS/SPIRE/Hill, Motte, HOBYS Key Programme Consortium; X-ray: ESA/XMM-Newton/EPIC/XMM-Newton-SOC/Boulanger. For a larger version of this image please go here.

The Eagle Nebula as never seen before. In 1995, the Hubble Space Telescope's 'Pillars of Creation' image of the Eagle Nebula became one of the most iconic images of the 20th century. Now, two of ESA's orbiting observatories have shed new light on this enigmatic star-forming region.

The Eagle Nebula is 6500 light-years away in the constellation of Serpens. It contains a young hot star cluster, NGC6611, visible with modest back-garden telescopes, that is sculpting and illuminating the surrounding gas and dust, resulting in a huge hollowed-out cavity and pillars, each several light-years long.

The Hubble image hinted at new stars being born within the pillars, deeply inside small clumps known as 'evaporating gaseous globules' or EGGs. Owing to obscuring dust, Hubble's visible light picture was unable to see inside and prove that young stars were indeed forming.

The ESA Herschel Space Observatory's new image shows the pillars and the wide field of gas and dust around them. Captured in far-infrared wavelengths, the image allows astronomers to see inside the pillars and structures in the region.

In parallel, a new multi-energy X-ray image from ESA's XMM-Newton telescope shows those hot young stars responsible for carving the pillars.

Combining the new space data with near-infrared images from the European Southern Observatory's (ESO's) Very Large Telescope at Paranal, Chile, and visible-light data from its Max Planck Gesellschaft 2.2m diameter telescope at La Silla, Chile, we see this iconic region of the sky in a uniquely beautiful and revealing way.

In visible wavelengths, the nebula shines mainly due to reflected starlight and hot gas filling the giant cavity, covering the surfaces of the pillars and other dusty structures.

At near-infrared wavelengths, the dust becomes almost transparent and the pillars practically vanish.

In far-infrared, Herschel detects this cold dust and the pillars reappear, this time glowing in their own light.

Intricate tendrils of dust and gas are seen to shine, giving astronomers clues about how it interacts with strong ultraviolet light from the hot stars seen by XMM-Newton.

In 2001, Very Large Telescope near-infrared images had shown only a small minority of the EGGs were likely to contain stars being born.

However, Herschel's image makes it possible to search for young stars over a much wider region and thus come to a much fuller understanding of the creative and destructive forces inside the Eagle Nebula.

Earlier mid-infrared images from ESA's Infrared Space Observatory and NASA's Spitzer, and the new XMM-Newton data, have led astronomers to suspect that one of the massive, hot stars in NGC6611 may have exploded in a supernova 6000 years ago, emitting a shockwave that destroyed the pillars.

However, because of the distance of the Eagle Nebula, we won't see this happen for several hundred years yet.

Powerful ground-based telescopes continue to provide astonishing views of our Universe, but images in far-infrared, mid-infrared and X-ray wavelengths are impossible to obtain owing to the absorbing effects of Earth's atmosphere.

Space-based observatories such as ESA's Herschel and XMM-Newton help to peel back that veil and see the full beauty of the Universe across the electromagnetic spectrum.

With regions like the Eagle Nebula, combining all of these observations helps astronomers to understand the complex yet amazing lifecycle of stars.

Related Links
Herschel
XMM-Newton
Stellar Chemistry, The Universe And All Within It




.
.
Get Our Free Newsletters Via Email
...
Buy Advertising Editorial Enquiries




.

. Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle



STELLAR CHEMISTRY
Calculating What's in the Universe from a 3-D Map
Berkeley CA (SPX) Jan 17, 2012
Since 2000, the three Sloan Digital Sky Surveys (SDSS I, II, III) have surveyed well over a quarter of the night sky and produced the biggest color map of the universe in three dimensions ever. Now scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and their SDSS colleagues, working with DOE's National Energy Research Scientific Computing Cen ... read more


STELLAR CHEMISTRY
Findings prove Miscanthus x giganteus has great potential as an alternative energy source

US Woody Biomass Prices Have Dropped the Past Three Years

Bio architecture lab technology converts seaweed to renewable fuels and chemicals

From field to biorefinery: Computer model optimizes biofuel operations

STELLAR CHEMISTRY
NASA Joins MIT and DARPA for Out-of-This-World Student Robotic Challenge

Snakes Improve Search-and-Rescue Robots

A new Artificial Intelligence technique to speed the planning of tasks when resources are limited

Open-source robotic surgery platform going to top medical research labs

STELLAR CHEMISTRY
China voices 'deep concern' over US wind tower probe

Power generation is blowing in the wind

Spain's Gamesa wins Chinese wind turbine contract

Mortenson Starts Construction of Rim Rock Wind Project

STELLAR CHEMISTRY
Gamesa buys stake in EV software firm

GM reclaims world's biggest carmaker title as Toyota skids

GM reclaims world's biggest carmaker title as Toyota skids

Spanish fold-up car to be unveiled at EU

STELLAR CHEMISTRY
Study: LNG exports will increase prices

China calls for restraint in Sudan oil dispute

Iran paid through Turkey for oil sales to India

The great gas hydrate escape

STELLAR CHEMISTRY
New form of graphene could prevent electronics from overheating and revolutionize thermal management

VW nears number one ranking with 8 mn sales

Graphene grows better on certain copper crystals

New method of growing high-quality graphene promising for next-gen technology

STELLAR CHEMISTRY
China fund buys stake in British utility

Maryland Smart Growth Weakness Frustrates Stakeholders

Japan's quake-hit TEPCO to put up business bills

Tough economy curbs clean energy investment: experts

STELLAR CHEMISTRY
Amazon Basin shifting to carbon emitter: study

Team finds natural reasons behind nitrogen-rich forests

Indonesia pledges to conserve half of Borneo region

New study evaluates impact of land use activity in the Amazon basin


.

The content herein, unless otherwise known to be public domain, are Copyright 1995-2012 - Space Media Network. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement