Iconocast Logo

Welcome To Iconocast

How to add a URL link from your web site to the Iconocast web sites

Virtual tour of Southern California
blank

 

Recent News and Articles on the Keywords: extra-solar planet + extrasolar planet + planet  Related to the article below (Last Update: 5/5/2008)

Newly Discovered Extrasolar Planet Is Smallest Yet
Wired News - Apr 10, 2008
... which is well-within the thresholds of extremophile bacteria on our planet. Extrasolar planets are detected by a variety of means, although most often ...
Small Extrasolar Planet Found Around Nearby Star
FOXNews - Apr 10, 2008
A smaller, rocky planet, GJ 436 c, has also been discovered orbiting the same star. Astronomers have discovered what may be the smallest extrasolar planet ...

AFP
Smallest extrasolar planet discovered: Spanish researchers
AFP - Apr 9, 2008
"GJ 436T" has a mass five times the size of Earth, which makes it the smallest extrasolar planet among the roughly 300 identified so far, Ribas said in ...
Distant solar system holds smallest Earth-like planet
Johns Hopkins News-Letter, MD - Apr 17, 2008
However, as scientists develop better and better techniques for sensing extrasolar planets, the discovery of an Earth-massed planet should not be far in the ...
More secrets of the universe are being discovered
Detroit Free Press, United States - Apr 10, 2008
... said the Hubble Space Telescope had found methane, an organic molecule that may be associated with life, on an extrasolar planet for the first time. ...

LabnewsOnline
Planet hunters score a perfect 10
LabnewsOnline, UK - Apr 10, 2008
They are known as extrasolar planets as they orbit around other stars. Team member Dr Don Pollacco from the Astrophysics Research Centre in the School of ...

Space Daily
The Astrobiology Universe
Space Daily, CA - May 1, 2008
It takes six months to travel to Mars, and the explorers would stay on the planet for at least 500 days. For humans to travel around the surface, ...
Smallest exoplanet may have been found
New Scientist (subscription), UK - Apr 11, 2008
The smallest extrasolar planet around a normal star ? weighing just 5 times that of Earth ? may have been found, using a new technique that analyses changes ...
New world order: 277 more
Fort Wayne Journal Gazette, IN - Apr 7, 2008
?We?ve already been able to detect planets with only five or 10 times the mass of the Earth,? said Sara Seager, a prominent extrasolar planet researcher and ...

PhysOrg.com
Laser experiments offer insight into evolution of 'gas giants'
PhysOrg.com, VA - Apr 28, 2008
Theoretical research points out that material deep within a planet?s interior could exhibit unusual characteristics, such as high-temperature ...
Source: Google News

Detection of an Extrasolar Planet Atmosphere 1 -
D Charbonneau, TM Brown, RW Noyes, RL Gilliland - The Astrophysical Journal, 2002 - UChicago Press
... Transiting extrasolar planets present a unique opportunity for us to learn about
the ... dependent variations in the height at which the planet becomes opaque to ...

[PDF] Infrared radiation from an extrasolar planet -
D Deming, S Seager, LJ Richardson, J Harrington - Arxiv preprint astro-ph/0503554, 2005 - arxiv.org
... transiting planet system 27 using Spitzer?s Infrared Array Camera 28 . ... represent
the first measurement of radiation from extrasolar planets. ...

[PDF] Spectroscopic [Fe/H] for 98 extra-solar planet-host stars? -
NC Santos, G Israelian, M Mayor - Arxiv preprint astro-ph/0311541, 2003 - arxiv.org
... 4 NC Santos et al.: Spectroscopic [Fe/H] for 98 extra-solar planet-host stars Table
2. Stars with planets and derived stellar parameters (HD number between 1 ...
-

An extended upper atmosphere around the extrasolar planet HD209458b. -
A Vidal-Madjar, AL Des Etangs, JM Desert, GE … - Nature, 2003 - ncbi.nlm.nih.gov
Click here to read Comment in: Nature. 2003 Mar 13;422(6928):124-5. An extended
upper atmosphere around the extrasolar planet HD209458b. ...

[PDF] A New Transiting Extrasolar Giant Planet -
M Konacki, G Torres, S Jha, D Sasselov - Arxiv preprint astro-ph/0301052, 2003 - arxiv.org
... The CORALIE survey for southern extra-solar planets. ... day period brown dwarf disguised
as a planet. ... and Migration of Giant Planets: Modeling Extrasolar Planets. ...

Detection of Thermal Emission from an Extrasolar Planet -
D Charbonneau, LE Allen, ST Megeath, G Torres, R … - The Astrophysical Journal, 2005 - UChicago Press
... Extrasolar planets that transit their parent stars are particularly valuable, since
they afford ... stars that direct follow-up studies of the planet are likely ...

[PDF] An extrasolar planet that transits the disk of its parent star -
M Konacki, G Torres, S Jha, DD Sasselov - Nature, 2003 - mit.edu
... The CORALIE survey for southern extra-solar planets. ... day period brown dwarf disguised
as a planet. ... and migration of giant planets: Modeling extrasolar planets. ...
-

Extrasolar Planet Finding via Optimal Apodized-Pupil and Shaped-Pupil Coronagraphs -
NJ Kasdin, RJ Vanderbei, DN Spergel, MG Littman - The Astrophysical Journal, 2003 - UChicago Press
... throughput. 1. INTRODUCTION. With over 80 extrasolar planets discovered
to date, interest in planet finding is becoming intense. ...

The CORALIE survey for southern extra-solar planets. I. A planet orbiting the star Gliese 86 -
D Queloz, M Mayor, L Weber, A Bl?cha, M Burnet, B … - Astronomy and Astrophysics, 2000 - adsabs.harvard.edu
... which, 4 years ago, the first extra-solar planet orbiting a ... the idea that a maximum
planet mass may ... D., Udry S., 1998, In: Brown Dwrafs and Extrasolar Planets. ...

Chemical Equilibrium Abundances in Brown Dwarf and Extrasolar Giant Planet Atmospheres -
A Burrows, CM Sharp - The Astrophysical Journal, 1999 - UChicago Press
... for a variety of brown dwarf and extrasolar giant planet atmosphere models ... detections,
bona fide brown dwarfs and extrasolar giant planets (EGPs; Burrows ...

Source: Google Scholar

Hazy red sunset on extrasolar planet

A team of astronomers have used the NASA/ESA Hubble Space Telescope to detect, for the first time, strong evidence of hazes in the atmosphere of a planet orbiting a distant star. The discovery comes after extensive observations made recently with Hubble’s Advanced Camera for Surveys (ACS).

The team, led by Frédéric Pont from the Geneva University Observatory in Switzerland, used Hubble’s ACS to make the first detection of hazes in the atmosphere of the giant planet. "One of the long-term goals of studying extrasolar planets is to measure the atmosphere of an Earth-like planet, this present result is a step in this direction" says Pont. "HD 189733b is the first extrasolar planet for which we are piecing together a complete idea of what it really looks like."

The new observations were made as the extrasolar planet, dubbed HD 189733b, passed in front of its parent star in a transit. As the light from the star passes through the atmosphere around the limb of the giant extrasolar planet, the gases in the atmosphere stamp their unique signature on the starlight from HD 189733.

The planet itself, orbiting close to its parent star, is a ‘hot-Jupiter’ type of gas giant slightly larger than Jupiter. The proximity to its star results in an atmospheric temperature of roughly seven hundred degrees Celsius. Measurements of the way light varies as the planet passes in front of its parent star indicates that HD 189733b has neither Earth-sized moons nor any discernable Saturn-like ring system.

Hubble’s ACS camera, coupled with a grism (a kind of cross between a prism and a diffraction grating) allowed the astronomers to make extremely accurate measurements of the spectrum of HD 189733b, allowing conclusions to be drawn about the composition of the planet’s atmosphere. The exquisite level of precision needed to make this observation can only, at the moment, be achieved from space. The combination of a large planet and relatively small parent star – only 76% of the diameter of our Sun – contributes to the success of this delicate experiment.

Where the scientists had expected to see the fingerprints of sodium, potassium and water there were none. This finding, combined with the distinct shape of the planet’s spectrum, infers that high level hazes (with an altitude range of roughly 1000 km) are present. So the atmosphere on HD 189733b would look very similar to a gorgeous red sunset over Athens! Venus and Saturn’s moon Titan, in our own Solar System, are also covered with haze. According to the scientists the haze probably consists of tiny particles (less than 1/1000 mm in size) of condensates of iron, silicates and aluminium oxide dust (the compound on Earth which the mineral sapphire is made of).

As part of the observations of HD 189733, the teams of astronomers also needed to accurately account for the variations in the star’s brightness during the set of observations. ‘Starspots’ like those seen on our own Sun may cover several percent of the star and are thought to be about 1000 degrees Celsius cooler than the rest of HD 189733’s surface. It was found that there is a starspot on the star’s surface which is over 80,000 km across.

 
 
 
Google
Web www.iconocast.com

Search inside Iconocast for the keyword you have in mind.

Iconocast has collected more than 50,000 articles and press releases on health and science.

These are current and most up to date press releases on the subject you are searching.

We collect current health and science press releases daily from more than 5000 research and health institutes. Here is an example : The elderberry way to perfect skin

We believe if you do search inside Iconocast, you will get better results than searching the web alone.

 
 
Continue News With: News4 ; News5 ; News6 ; News7 ; News8 ; News9 ; News9A


ADVERTISEMENT

Iconocast is about learning and teaching without borders; we offer eMarketing, Internet Advertising, Internet Marketing, Search Engine Optimization, Search Engine Marketing, Online Branding, and eMarketing News Services.

 

Iconocast Home Page

Contact Iconocast

© 2003-07. ICONOCAST is a trademark of iconocast.com.