Cerro Paranal is an astronomers paradise with its stunningly dark, steady and transparent sky. Located in the barren Atacama Desert of Chile it is home to some of the world's leading telescopes. Operated by the European Southern Observatory (eso.org) the Very Large Telescope (VLT) is located on Paranal, composed of four 8 m telescopes which can combine their light to make a giant telescope by interferometry. Four smaller auxiliary telescopes, each 1.8 m in aperture, are important elements of the VLT interferometer. This footage is made during an imaging expedition to Paranal assigned by the European Southern Observatory (ESO). All video rights reserved by Babak Tafreshi (btafreshi@twanight.org) of The World at Night (TWAN) program. The music is composed by Thomas Nordwest (thomasnordwest.com) and provided by the Ars Electronica (aec.at).
Showing posts with label astrophotography. Show all posts
Showing posts with label astrophotography. Show all posts
Sunday, February 5, 2012
the eye of the beholder
Cerro Paranal is an astronomers paradise with its stunningly dark, steady and transparent sky. Located in the barren Atacama Desert of Chile it is home to some of the world's leading telescopes. Operated by the European Southern Observatory (eso.org) the Very Large Telescope (VLT) is located on Paranal, composed of four 8 m telescopes which can combine their light to make a giant telescope by interferometry. Four smaller auxiliary telescopes, each 1.8 m in aperture, are important elements of the VLT interferometer. This footage is made during an imaging expedition to Paranal assigned by the European Southern Observatory (ESO). All video rights reserved by Babak Tafreshi (btafreshi@twanight.org) of The World at Night (TWAN) program. The music is composed by Thomas Nordwest (thomasnordwest.com) and provided by the Ars Electronica (aec.at).
Tuesday, December 6, 2011
The Habitable Exoplanets Catalog, a new online database of habitable worlds
Scientists are now starting to identify potential habitable exoplanets after nearly twenty years of the detection of the first planets around other stars. Over 700 exoplanets have been detected and confirmed with thousands more still waiting further confirmation by missions such as NASA Kepler.
Most of these are gas giants, similar to Jupiter and Neptune, but orbiting very dangerously close to their stars. Only a few have the right size and orbit to be considered suitable for any life.
Now the Planetary Habitability Laboratory (PHL) of the University of Puerto Rico at Arecibo (UPR Arecibo) presents a new assessment of the habitability of these worlds as part of its Habitable Exoplanets Catalog (HEC).
The catalog not only identifies new potential habitable exoplanets, including exomoons like the Pandora world in the movie Avatar, but also ranks them according to various habitability indices.
"One important outcome of these rankings is the ability to compare exoplanets from best to worst candidates for life", says Abel Mendez, Director of the PHL and principal investigator of the project.
According to Mendez, "New observations with ground and orbital observatories will discover thousands of exoplanets in the coming years. We expect that the analyses contained in our catalog will help to identify, organize, and compare the life potential of these discoveries."
The catalog lists and categorizes exoplanets discoveries using various classification systems, including tables of planetary and stellar properties. One of the classifications divides them into eighteen mass and thermal categories, creating a table similar to a periodic table for exoplanets.
Additional resources of the catalog will include scientific visualizations and stellar maps of exoplanets. Various undergraduate students participated in the project.
Only two confirmed exoplanets so far match the criteria for habitability in the catalog, Gliese 581d and HD 85512b, both still marginally Earth-like. However, the catalog identifies over 15 exoplanets and 30 exomoons as potential habitable candidates.
Future observations with new instruments, such as the proposed NASA Terrestrial Planet Finder (TPF), will be necessary to confirm the suitability for life of any of these candidates.
"I hope this database will help increase interest in building a big space-based telescope to observe exoplanets directly and look for possible signatures of life," says Jim Kasting, an expert on planetary habitability science from Penn State.
The catalog is available now online at the PHL website phl.upr.edu. A poster will be presented at the First Kepler Science Conference from December 5th to 9th, 2011 in NASA Ames, Moffet Field, California.
The PHL is a research and educational virtual laboratory dedicated to studies of the habitability of Earth, the Solar System, and exoplanets. The PHL is managed by the UPR Arecibo with the international collaboration of scientists from various institutions including NASA and SETI.
The catalog uses new habitability assessments like the Earth Similarity Index (ESI), the Habitable Zones Distance (HZD), the Global Primary Habitability (GPH), classification systems, and comparisons with Earth past and present. It also uses data from other databases, such as the Extrasolar Planets Encyclopaedia, the Exoplanet Data Explorer (exoplanets.org), the NASA Kepler Mission, and other sources.
via spacedaily.com
Saturday, July 9, 2011
Ocean Sky...
Ocean Sky from Alex Cherney on Vimeo.
At a star party in August 2009 I took my first long exposure photograph of the night sky. I was so thrilled with the results that I dedicated most moonless weekends since then to photographing two things I love the most in nature - the night sky and the Ocean.
Taking a series of images and combining them into a time lapse video sequence made it even more interesting. I have since experimented with all-night time lapses, panning motion, etc. But most importantly I've enjoyed the journey immensely.This time lapse video is the result of almost 1.5 years of work, 31 hours of taking images during six nights on Southern Ocean Coast in Australia.Ocean Sky was awarded the overall winner prize at STARMUS astrophotography competition:http://www.starmus.com/pages/en/winners-starmus-astro-photography-competition...The Sound track is by Redmann
http://www.toucanmusic.co.uk/artists/artist.php?q=Redmann Alex Cherney
http://www.terrastro.com
Tuesday, April 19, 2011
mountain....
The Mountain from Terje Sorgjerd on Vimeo.
This was filmed between 4th and 11th April 2011. I had the pleasure of visiting El Teide.
Spain´s highest mountain @(3718m) is one of the best places in the world to photograph the stars and is also the location of Teide Observatories, considered to be one of the world´s best observatories.
The goal was to capture the beautiful Milky Way galaxy along with one of the most amazing mountains I know El Teide. I have to say this was one of the most exhausting trips I have done. There was a lot of hiking at high altitudes and probably less than 10 hours of sleep in total for the whole week. Having been here 10-11 times before I had a long list of must-see locations I wanted to capture for this movie, but I am still not 100% used to carrying around so much gear required for time-lapse movies.
A large sandstorm hit the Sahara Desert on the 9th April (http://bit.ly/g3tsDW) and at approx 3am in the night the sandstorm hit me, making it nearly impossible to see the sky with my own eyes.
Interestingly enough my camera was set for a 5 hour sequence of the milky way during this time and I was sure my whole scene was ruined. To my surprise, my camera had managed to capture the sandstorm which was backlit by Grand Canary Island making it look like golden clouds. The Milky Way was shining through the clouds, making the stars sparkle in an interesting way. So if you ever wondered how the Milky Way would look through a Sahara sandstorm, look at 00:32.
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Thursday, September 16, 2010
NASA - The Rosette Nebula
The Rosette Nebula
Located about 5,000 light years from Earth, this composite image shows the Rosette star formation region. Data from the Chandra X-ray Observatory are colored red and outlined by a white line. The X-rays reveal hundreds of young stars in the central cluster and fainter clusters on either side. Optical data from the Digitized Sky Survey and the Kitt Peak National Observatory (purple, orange, green and blue) show large areas of gas and dust, including giant pillars that remain behind after intense radiation from massive stars has eroded the more diffuse gas.
A recent Chandra study of the cluster on the right side of the image, named NGC 2237, provides the first probe of the low-mass stars in this satellite cluster. Previously only 36 young stars had been discovered in NGC 2237, but the Chandra work has increased this sample to about 160 stars. The presence of several X-ray emitting stars around the pillars and the detection of an outflow -- commonly associated with very young stars -- originating from a dark area of the optical image indicates that star formation is continuing in NGC 2237. By combining these results with earlier studies, scientists conclude that the central cluster formed first, followed by expansion of the nebula, which triggered the formation of the two neighboring clusters, including NGC 2237.
Image Credit: X-ray (NASA/CXC/SAO/J. Wang et al), Optical (DSS & NOAO/AURA/NSF/KPNO 0.9-m/T. Rector et al)
via nasa.gov
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