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The picture of the day
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Available on-line this brief terminological compilation.

També disponible el "Diccionari de física"


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Interview with Carme Jordi "Gaya has already covered the entire sky". EWASS 2015

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Image: Rafael Balaguer and Jèssica Lleonart. Venus and Jupiter conjunction from Llagostera. 30 June.


Venus and Jupiter together all June

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Rosetta mission extended

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New Horizons closest approach to Pluto on 14 July. NASA's mission page and ServiAstro special page

News

July 2015

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Counting stars with Gaia, 3 July 2015
This image, based on housekeeping data from ESA’s Gaia satellite, is no ordinary depiction of the heavens. While the image portrays the outline of our Galaxy, the Milky Way, and of its neighbouring Magellanic Clouds, it was obtained in a rather unusual way.

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Comet sinkholes generate jets, 3 July 2015
A number of the dust jets emerging from Rosetta’s comet can be traced back to active pits that were likely formed by a sudden collapse of the surface. These ‘sinkholes’ are providing a glimpse at the chaotic and diverse interior of the comet..

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New Horizons Update: Methane Detected; New Images of Pluto and Charon; Sunrise/Sunset Observations, 1 July 2015
Yes, there is methane on Pluto, and, no, it doesn’t come from cows. The infrared spectrometer on NASA’s Pluto-bound New Horizons spacecraft has detected frozen methane on Pluto’s surface; Earth-based astronomers first observed the chemical compound on Pluto in 1976.

2015 June

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One second more in 2015,
On June 30th will be added a second to our clock time (UTC) to adjust it with the Solar Time (UT). This Time difference corresponds to the variability of the terrestrial rotation.

International Earth Rotation and Reference System Service (IERS)
Monography about the Time mesurement

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Monster black hole wakes up after 26 years, 26 June 2015
Over the past week, ESA's Integral satellite has been observing an exceptional outburst of high-energy light produced by a black hole that is devouring material from its stellar companion.

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30 June
Venus and Jupiter very close to each other this night!

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Venus and Jupiter together all June

màxim Hot lava flows discovered on Venus, 18 june
ESA’s Venus Express has found the best evidence yet for active volcanism on Earth’s neighbour planet. Seeing the planet’s surface is extremely difficult due to its thick atmosphere, but radar observations by previous missions to Venus have revealed it as a world covered in volcanoes and ancient lava flows.

màxim Hubble Telescope Detects ‘Sunscreen’ Layer on Distant Planet ,12 June
Hubble Space Telescope has detected a stratosphere, one of the primary layers of Earth’s atmosphere, on a massive and blazing-hot exoplanet known as WASP-33b.
The presence of a stratosphere can provide clues about the composition of a planet and how it formed. This atmospheric layer includes molecules that absorb ultraviolet and visible light, acting as a kind of “sunscreen” for the planet it surrounds. Until now, scientists were uncertain whether these molecules would be found in the atmospheres of large, extremely hot planets in other star systems.

màxim A Celestial Butterfly Emerges from its Dusty Cocoon,10 June
Some of the sharpest images ever made with ESO’s Very Large Telescope (VLT) have, for the first time, revealed what appears to be an ageing star giving birth to a butterfly-like planetary nebula. These observations of the red giant star L2 Puppis, from the ZIMPOL mode of the newly installed SPHERE instrument, also clearly showed a close companion. The dying stages of stars continue to pose astronomers with many riddles, and the origin of such bipolar nebulae, with their complex and alluring hourglass figures, doubly so. This new imaging mode means that the VLT is currently the sharpest astronomical direct imaging instrument in existence.

màxim Meteor Shower in Broad Daylight ,5 June
Earth is entering a stream of debris from an unknown comet, and this is causing one of the most intense meteor showers of the year. Ironically, most sky watchers won't notice because the shower peaks in broad daylight. We only know it's happening because a radar in Canada is picking up echoes from meteoroids streaking through the blue sky overhead. Astronomers call these meteors "Arietids" because they emerge from the constellation Aries not far from the June sun.

màxim NASA’s Hubble Finds Pluto’s Moons Tumbling in Absolute Chaos , 4 June
If you lived on one of Pluto’s moons, you might have a hard time determining when, or from which direction, the sun will rise each day. Comprehensive analysis of data from NASA’s Hubble Space Telescope shows that two of Pluto’s moons, Nix and Hydra, wobble unpredictably.

màxim Ultraviolet study reveals surprises in comet coma , 2 June
Rosetta’s continued close study of Comet 67P/Churyumov–Gerasimenko has revealed an unexpected process at work, causing the rapid breakup of water and carbon dioxide molecules spewing from the comet’s surface.

May

màxim Call to Action: Cosmic Light Edu kit Workshops, 29 May
The Cosmic Light EDU kit, which comprises a virtual kit with many activities, tools and other resources on the topic of the science of light. This kit will feature continued support for teaching communities around the world, and a special component designed for children with visual impairments will also be incorporated.

màxim UB Science Festival, On 22 May 2015, the University of Barcelona opens its door to citizens to celebrate the UB Science Festival. The main objective of the activity is to bring people closer to the research activity developed at the University in an amusing and innovative way.
Throughout the day, UB campuses organise different science dissemination activities.
Web

màxim The Dreadful Beauty of Medusa, 21 May
Astronomers using ESO’s Very Large Telescope in Chile have captured the most detailed image ever taken of the Medusa Nebula. As the star at the heart of this nebula made its transition into retirement, it shed its outer layers into space, forming this colourful cloud. The image foreshadows the final fate of the Sun, which will eventually also become an object of this kind

màxim The Dark Side of Star Clusters, 13 May
Observations with ESO’s Very Large Telescope in Chile have discovered a new class of “dark” globular star clusters around the giant galaxy Centaurus A. These mysterious objects look similar to normal clusters, but contain much more mass and may either harbour unexpected amounts of dark matter, or contain massive black holes — neither of which was expected nor is understood.

màxim Outreach talk: "Quiet Blak Holes hidden in Binary Systems" ,
Speaker: Marc Ribó
Date/Time: wednesday 13 May / 20:00
Place: Seu de l'Agrupació Astronòmica Sabadell, C/ Prat de la Riba, s/n (Parc Catalunya), Sabadell
Abstract: http://www.am.ub.edu/ca/node/969

màxim Fresh Evidence for How Water Reached Earth Found in Asteroid Debris, 8 May
Water delivery via asteroids or comets is likely taking place in many other planetary systems, just as it happened on Earth, according to new research. The findings add further support to the possibility that water can be delivered to Earth-like planets via such bodies to create a suitable environment for the formation of life.

màxim Saturn Moon's Activity Could Be 'Curtain Eruptions', 7 May
New research using data from NASA's Cassini mission suggests most of the eruptions from Saturn's moon Enceladus might be diffuse curtains rather than discrete jets. Many features that appear to be individual jets of material erupting along the length of prominent fractures in the moon's south polar region might be phantoms created by an optical illusion, according to the new study.

April

màxim NASA’s New Horizons Detects Surface Features, Possible Polar Cap on Pluto, 30 April
For the first time, images from NASA’s New Horizons spacecraft are revealing bright and dark regions on the surface of faraway Pluto – the primary target of the New Horizons close flyby in mid-July.

màxim Saturn's sponge-like moon Hiperion, 29 April
The subject of this image bears a remarkable resemblance to a porous sea sponge, floating in the inky black surroundings of the deep sea.
Indeed, the cold, hostile and lonely environment of deep water is not too far removed from deep space, the actual setting for this image in which one of Saturn’s outer moons, Hyperion, can be seen in incredible detail. This image was taken by Cassini when the spacecraft performed a flyby of the small moon on 26 September 2005.

màxim 20 Exoworlds available for naming proposals, 27 April
The NameExoWorlds contest, organised by the IAU and Zooniverse, is now entering its next stage. The 20 most popular ExoWorlds have been made available for naming proposals from registered clubs and non-profit organisations.

màxim The Treasures of Hubble, 24 April
Today is the 25th anniversary of the launch of the Hubble Space Telescope. Astronomers at the European Space Astronomy Centre (ESAC) in Madrid, yesterday wished long life to Hubble and explained that more than half of current discoveries with the telescope are based on observations stored in the astronomical library of the ESAC.

màxim First Near Earth Asteroids Discovered from La Palma, 15 April
In 2014 the Isaac Newton Telescope became the first telescope in La Palma to discover and secure five Near Earth Asteroids (NEAs) as part of the EURONEAR project and as a result of the allocation of several override programmes awarded by the time allocation committees.

màxim Dark Energy Survey: mapping the dark matter of the Universe, 15 April
Scientists on the Dark Energy Survey have released the first in a series of dark matter maps of the cosmos. These maps, created with one of the world's most powerful digital cameras, are the largest contiguous maps created at this level of detail and will improve our understanding of dark matter's role in the formation of galaxies. Analysis of the clumpiness of the dark matter in the maps will also allow scientists to probe the nature of the mysterious dark energy, believed to be causing the expansion of the universe to speed up.

màxim First Signs of Self-interacting Dark Matter?, 15 april
For the first time dark matter may have been observed interacting with other dark matter in a way other than through the force of gravity. Observations of colliding galaxies made with ESO’s Very Large Telescope and the NASA/ESA Hubble Space Telescope have picked up the first intriguing hints about the nature of this mysterious component of the Universe.

màxim Calling all Photographers,
For the launch of Sentinel-2A, ESA is inviting you to take part in a photo contest focusing on the theme of ‘colour vision’. Enter for a chance to win a trip to ESA’s operations centre for the satellite’s launch event.

màxim NASA host briefings on historic mission to Pluto,
NASA Television will air media briefings at 1 p.m. EDT and 2:30 p.m. on Tuesday, April 14, to discuss plans and related upcoming activities about the agency’s historic New Horizons spacecraft flyby of Pluto this summer.
Briefers will describe the mission’s goals, scientific objectives and encounter plans, including the types of images and other data that can be expected and when.

màxim Complex Organic Molecules Discovered in Infant Star System,
For the first time, astronomers have detected the presence of complex organic molecules, the building blocks of life, in a protoplanetary disc surrounding a young star. The discovery, made with the Atacama Large Millimeter/submillimeter Array (ALMA), reaffirms that the conditions that spawned the Earth and Sun are not unique in the Universe.

màxim NASA Extends Campaign for Public to Name Features on Pluto The public has until Friday, April 24 to help name new features on Pluto and its orbiting satellites as they are discovered by NASA’s New Horizons mission.

màxim Total Lunar Eclipse 4 April,
At 12:00 TU occurred a Total Lunar Eclipse visible from Asia, Australia, Pacific, America.

màxim Hershel and Planck find missing clue to galaxy cluster formation 1 April,
By combining observations of the distant Universe made with ESA’s Herschel and Planck space observatories, cosmologists have discovered what could be the precursors of the vast clusters of galaxies that we see today.