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NGC 4618 was discovered on 9 April 1787 by the German-British astronomer, Wilhelm Herschel, who also discovered Uranus in 1781. Only a year before discovering NGC 4618, Herschel theorised that the “foggy” objects astronomers were seeing in the night sky were likely to be large star clusters located much further away then the individual stars he could easily discern.
Since Herschel proposed his theory, astronomers have come to understand that what he was seeing was a galaxy. NGC 4618, classified as a barred spiral galaxy, has the special distinction amongst other spiral galaxies of only having one arm rotating around the centre of the galaxy.
Located about 21 million light-years from our galaxy in the constellation Canes Venatici, NGC 4618 has a diameter of about one third that of the Milky Way. Together with its neighbour, NGC 4625, it forms an interacting galaxy pair, which means that the two galaxies are close enough to influence each other gravitationally. These interactions may result in the two (or more) galaxies merging together to form a new formation, such as a ring galaxy.
Credits: ESA/Hubble & NASA, I. Karachentsev; CC BY 4.0
This image of the young volcanic region of Elysium Planitia on Mars [10.3°N, 159.5°E] was taken on 14 April 2021 by the CaSSIS camera on the ESA-Roscosmos ExoMars Trace Gas Orbiter (TGO).
The two blue parallel trenches in this image, called Cerberus Fossae, were thought to have formed by tectonic processes. They run for almost one thousand km over the volcanic region. In this image, CaSSIS is looking straight down into one of these 2 km-wide fissures.
The floor here is a few hundred metres deep and is filled with coarse-grained sand, likely basaltic in composition, which appears blue in the CaSSIS false-colour composite image. The flat volcanic plains nearby are punctured by small impact craters, which expose possibly the same basaltic materials that we see within Cerberus Fossae.
TGO arrived at Mars in 2016 and began its full science mission in 2018. The spacecraft is not only returning spectacular images, but also providing the best ever inventory of the planet’s atmospheric gases, and mapping the planet’s surface for water-rich locations. It will also provide data relay services for the second ExoMars mission comprising the Rosalind Franklin rover and Kazachok platform, when it arrives on Mars in 2023.
Credits: ESA/Roscosmos/CaSSIS; CC BY-SA 3.0 IGO
Desadarve III Certamen de Arte Efímero de Tudela. "Esa bruma infinita". Palacio de Marqués de San Adrián
Madrugué para que los primeros rayos del sol aparecieran por miespalda y con esa luz dorada del amanecer pusieran color, en este caso, a untrocito de la Ría de Vigo, con su inconfundible puente de Rande que forma yadesde hace décadas, del paisaje de las Rías Baixas.
Space Science image of the week:
In the early hours of Saturday morning, the international Cassini–Huygens mission made its final close flyby of Saturn’s largest moon, Titan, coming within 1000 km of the atmosphere-clad world.
The image presented here is a raw image sent back to Earth yesterday, taken on Saturday at 18:42 GMT. It is one of many that can be found in the Cassini raw image archive.
The latest flyby used Titan’s gravity to slingshot Cassini into the final phase of its mission, setting it up for a series of 22 weekly ‘Grand Finale’ orbits that will see the spacecraft dive between Saturn’s inner rings and the outer atmosphere of the planet. The first of these ring plane dives occurs on Wednesday.
Cassini will make many additional non-targeted flybys of Titan and other moons in the Saturnian system in the coming months, at much greater distances. Non-targeted flybys require no special manoeuvres, but rather the moon happens to be relatively close to the spacecraft’s path.
A final, distant, flyby of Titan will occur on 11 September, in what has been nicknamed the ‘goodbye kiss,’ because it will direct Cassini on a collision course with Saturn on 15 September. This will conclude the mission in a manner that avoids the possibility of a future crash into the potentially habitable ocean-moon Enceladus, protecting that world for future exploration.
A press conference will be held on 25 April at 13:30 GMT (15:30 CEST), at the European Geosciences Union meeting in Vienna, to preview the Grand Finale, as well as celebrate the scientific highlights of Cassini’s incredible 13-year odyssey at Saturn.
Just today a new result was published in Nature Astronomy finds that when viewed from Cassini's orbit, Titan's nightside likely shines 10-200 times brighter than its dayside. Scientists think that this is caused by efficient forward scattering of sunlight by its extended atmospheric haze, a behaviour unique to Titan in our Solar System.
Cassini–Huygens is a cooperative project of NASA, ESA and ASI, the Italian space agency.
Credit: NASA/JPL-Caltech/Space Science Institute
A veces no ves esa luz...
A veces la buscas...
Con o sin éxito...
Cuando la encuentras, la pierdes´otra vez...
Y cuando de repente un día te tropiezas con ella te come la nostalgia.
No se que es, pero me gusta
:)
Foto tomada desde polideportivo de Santurtzi ^^
The Falcon 9 Crew Dragon spacecraft "Endurance" is being readied for the launch of Crew-3 now set for 3 November 2021 at the Kennedy Space Center in Florida.
It is the first spaceflight for ESA astronaut Matthias Maurer, who will be the 600th human to fly to space.
On Station, Matthias will become a long-duration crew member, spending around six months living and working in orbit. During this time, he will support more than 35 European experiments and numerous international experiments on board.
Credits: ESA - S. Corvaja
Euclid’s Near-Infrared Spectrometer and Photometer (NISP) instrument is dedicated to measuring the amount of light that galaxies emit at each wavelength. It will image the sky in infrared light (900–2000 nm) to measure the brightness and intensity of light. This image was taken during commissioning of Euclid to check that the focused instrument worked as expected.
This is a raw image taken using NISP’s ‘Y’ filter. Because it is largely unprocessed, some unwanted artefacts remain – for example the cosmic rays that shoot straight across. The Euclid Consortium will ultimately turn the longer-exposed survey observations into science-ready images that are artefact-free, more detailed, and razor sharp.
The image on the left shows the full NISP field of view, with the zoom-in on the right (4% of NISP’s full field of view) demonstrating the extraordinary level of detail that NISP is already achieving. We see spiral and elliptical galaxies, nearby and distant stars, star clusters, and much more. But the area of sky that it covers is actually only about a quarter of the width and height of the full Moon.
Euclid’s telescope collected light for 100 seconds to enable NISP to create this image. During nominal operation, it is expected to collect light for roughly five times longer, unveiling many more distant galaxies.
Before it reaches the detector, NISP sends incoming light through either a photometry filter or a spectrometry grism. In this image, the light from Euclid’s telescope has passed through the photometry filter.
Credits: ESA/Euclid/Euclid Consortium/NASA, CC BY-SA 3.0 IGO
no es cualquier ventana. No. Es una de las ventanas de la casa del campo de mis padres y que antes fue de mi abuelo. Lugar en el que jugué y de la que tengo lindos recuerdos. Casa que ya no me resultaba tan querida y entrañable en mi adolescencia cuando pasarme un finde en el campo no era el mejor programa, aunque a veces si me llevaba amigas con quienes compartir podia ser el mejor plan. Luego, ya con hijos el campo volvió a ser el mejor lugar en el que compartimos infinidad de aventuras. Y ahora con hijos adolescentes tengo la suerte de que como vamos poco y siempre invitan amigos para ellos es un buen programa.
|Explore, ♥ 169|
Esta mañana nos hemos levantando con unas ganas locas de juguetear por la cama y esas mismas ganas he tenido yo de fotear el momento (esta parte ha Sora no me la "caído" muy bien).
Seguir leyendo aquí
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Estos me los regalo mi madre este mismo lunes. Todavía no los he estrenado.
Creo que sobra el perfume en miniatura a la derecha y creo que hay demasiado espacio vacío en la esquina izquierda. Pero ya llevo 2 días intentando sacar algo que merezca la pena y no lo consigo. Y ya me he decidido por esta.
Se me olvidaba: el objetivo una Tamron SP 35-80mm analógico 1: 2.8-3.8. Para esta foto el diafragma esta abierto en 4.
To the human eye, Mercury may resemble a dull, grey orb but this enhanced-colour image from NASA’s Messenger probe, tells a completely different story. Swathes of iridescent blue, sandy-coloured plains and delicate strands of greyish white, create an ethereal and colourful view of our Solar System’s innermost planet.
Source Data: www.esa.int/ESA_Multimedia/Search?SearchText=iridescent+&...
converted PNM file - Adjusted in Photoshop CC2017 for clarity and noise reduction
A list of all ESA astronauts who have done spacewalks, presented in order of total time spent doing an Extra Vehicular Activity (EVA).
Known to the crew as an EVA (extravehicular activity), each spacewalk provides a valuable opportunity to carry out repairs, test new equipment and even perform science experiments beyond the confines of a spacecraft. Exiting the International Space Station however brings heightened risk and activities are planned down to the minute.
This infographic was updated in July 2021 after the spacewalks of Thomas Pesquet during his Alpha mission.
Updated September 2022 to add ESA astronaut Matthias Maurer and ESA astronaut Samantha Cristoforetti's spacewalks.
Credits: ESA
Webb is clearing up a space mystery!
Early in our cosmic history, gas in the universe shifted — over hundreds of millions of years — from opaque to transparent. Only when the gas became clear did light travel freely through the cosmos. But how did this change happen? Webb proves the answer lies in galaxies from the early universe.
Astronomers looked into galaxies so far away that their light took almost 13 billion years to reach us. That made these galaxies the perfect window into what the universe was like about 900 million years after the big bang, just before it became fully transparent.
Webb witnessed these galaxies heating up and ionizing the gas around them, turning their surrounding regions transparent. These transparent “bubbles” were about 2 million light-years in radius! Scientists believe the bubbles of transparency eventually grew and merged, creating a transparent universe. Learn more: www.nasa.gov/feature/goddard/2023/nasa-s-webb-proves-gala...
This image:
NASA’s James Webb Space Telescope has returned extraordinarily detailed near-infrared images of galaxies that existed when the universe was only 900 million years old, including never-before-seen structures. These distant galaxies are clumpy, often elongated, and are actively forming stars.
Credits: NASA, ESA, CSA, Simon Lilly (ETH Zürich), Daichi Kashino (Nagoya University), Jorryt Matthee (ETH Zürich), Christina Eilers (MIT), Rob Simcoe (MIT), Rongmon Bordoloi (NCSU), Ruari Mackenzie (ETH Zürich); Image Processing: Alyssa Pagan (STScI), Ruari Mackence Institute.
Image description: Six galaxies appear in boxes, three by two. From top left to bottom right: EIGER 4741 is made up of six hazy red or pink dots, and takes up about a quarter of the image. EIGER 4396 is primarily a hazy pink dot at the center with a very faint, smaller purple dot at its bottom right. EIGER 18026 looks like a paintbrush smudge, starting a third of the way from top left and ending about a third of the way from bottom right. The line is faint to start, bright red and bulbous at the center, and links faintly to three smaller purple dots at bottom right. EIGER 4784 also takes up a lot of the space. It has many pink and red ovals at the center along a mostly horizontal line, and a red dot and a blue dot appear arching up in a disconnected clockwise spiral shape. There is a red haze from center to the right, with a brighter red dot appearing a little lower at right. EIGER 7426 is on the smaller side, and has a larger white circle at center that connects with faint pink lines to a dot above it and one at the four o’clock position. EIGER 9209 appears smeared across the space, with a bright, larger red dot with a pink-white center toward the middle with a haze of red above it. The faint line breaks, but points toward a bright red dot at the top right, which also has a hazy red region around it.
Esa claridad y ese tono de verde se debe a unos focos muy proximos al lugar ,que me ayudaron bastante para iluminar la foto y sacarle el color del lugar
East Side Access tunnel boring machine launch March 18, 2011. Senator Malcolm Smith speaks in front of a tunnel boring machine. Photo by Metropolitan Transportation Authority / Patrick Cashin.
Set to fly in 2023, ESA’s Biomass Earth Explorer satellite with its 12-m diameter radar antenna will pierce through woodland canopies to perform a global survey of Earth’s forests – and see how they change over the course of Biomass’s five-year mission.
Trees are an integral, much-loved element of our environment; they also hold clues to our collective future. Knowing the amount of carbon bound up in forest biomass will sharpen our understanding of climate change and its likely effects on the global carbon cycle.
Biomass will achieve this using a ‘synthetic aperture radar’ to send down signals from orbit and record the resulting backscatter, building up maps of tree height and volume. To see through leafy treetop to the trees themselves, Biomass will employ long-wavelength ‘P-band’ radar, which has never previously flown in space. It will have its signals amplified to travel down from a 600-km altitude orbit down to Earth and back.
ESA’s Directorate of Technology, Engineering and Quality worked with the Biomass mission team on the advanced signal amplifiers needed to make the mission feasible, based on the most promising semiconductor since silicon.
Credits: Airbus Defence and Space
ESA project astronaut Sławosz Uznański-Wiśniewski about to take a bite of the first-ever batch of pierogi prepared in space during the Ignis mission. The traditional Polish dumpling floats in the International Space Station's window to the world, the European-built Cupola.
In a first for space cuisine, Sławosz brought a taste of home to orbit. Pierogi have been part of Polish cuisine since the 13th century and remain a staple of Polish home cooking.
The space pierogi were filled with mushrooms and sour cabbage, seasoned with bay leaf, marjoram and pepper. The dumplings underwent freeze-drying on Earth – a lengthy process that completely removes any water from the food while maintaining its properties and structure for years. Sławosz could enjoy the pierogi by adding hot water from the dispensers in the Space Station’s dining area.
All food delivered to the International Space Station must be crumb-free, lightweight, and keep for at least 24 months. Most of the space menu consists of canned or freeze-dried meals in plastic packages. Fresh fruits and vegetables are a luxury, only available when spacecraft arrive with new supplies.
Pierogi were considered bonus food, which is catered to specific crew members and makes up around 10 percent of their menu. Astronauts say bonus food adds variety to their meals, boosts mental wellbeing and helps them bond with crewmates in orbit.
Check out the whole Ignis menu, created in collaboration with a celebrity chef and a family-owned company in Poland, and learn more about the dos and don’ts for space food in the article Pierogi in space.
Credits: ESA-S. Uznański-Wiśniewski
ESA Kiruna station Credit: ESA - CC BY-SA IGO 3.0
ESA's Kiruna station, near Salmijärvi, Kiruna, Sweden, tracks Cryosat, Integral, the Sentinels and Swarm. Details: www.esa.int/kiruna Credit: ESA - CC BY-SA IGO 3.0