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EarthSky Blog
20 Sep 2017, 10:00 UTC
In the faint southern constellation of Antlia (The Air Pump) the careful observer with binoculars will spot a very red star, which varies slightly in brightness from week to week. This very unusual star is called U Antliae and new observations with the Atacama Large Millimeter/submillimeter Array (ALMA) are revealing a remarkably thin spherical shell around it. U Antliae is a carbon star, an evolved, cool and luminous star of the asymptotic giant branch type. Around 2700 years ago, U Antliae went through a short period of rapid mass loss. During this period of only a few hundred years, the material making up the shell seen in the new ALMA data was ejected at high speed. Examination of this shell in further detail also shows some evidence of thin, wispy gas clouds known as filamentary substructures. This spectacular view was only made possible by the unique ability to create sharp images at multiple wavelengths that is provided by the ALMA radio telescope, located on the Chajnantor Plateau in Chile’s Atacama Desert. ALMA can see much finer structure in the U Antliae shell than has previously been possible. The new ALMA data are not just a single image; ALMA produces a ...
Aging star blows off smoky bubble
20 Sep 2017, 10:00 UTC
In the faint southern constellation of Antlia (The Air Pump) the careful observer with binoculars will spot a very red star, which varies slightly in brightness from week to week. This very unusual star is called U Antliae and new observations with the Atacama Large Millimeter/submillimeter Array (ALMA) are revealing a remarkably thin spherical shell around it. U Antliae is a carbon star, an evolved, cool and luminous star of the asymptotic giant branch type. Around 2700 years ago, U Antliae went through a short period of rapid mass loss. During this period of only a few hundred years, the material making up the shell seen in the new ALMA data was ejected at high speed. Examination of this shell in further detail also shows some evidence of thin, wispy gas clouds known as filamentary substructures. This spectacular view was only made possible by the unique ability to create sharp images at multiple wavelengths that is provided by the ALMA radio telescope, located on the Chajnantor Plateau in Chile’s Atacama Desert. ALMA can see much finer structure in the U Antliae shell than has previously been possible. The new ALMA data are not just a single image; ALMA produces a ...
Space Fellowship
20 Sep 2017, 09:56 UTC
Most photographs don’t adequately portray the magnificence of the Sun’s corona. Seeing the corona first-hand during a total solar eclipse is unparalleled. The human eye can adapt to see coronal features and extent that average cameras usually cannot. Welcome, however, to the digital age. The featured picture is a combination of forty exposures from one thousandth of a second to two seconds that, together, were digitally combined and processed to highlight faint features of the total solar eclipse that occurred in August of 2017. Clearly visible are intricate layers and glowing caustics of an ever changing mixture of hot gas and magnetic fields in the Sun’s corona. Looping prominences appear bright pink just past the Sun’s limb. Faint details on the night side of the New Moon can even be made out, illuminated by sunlight reflected from the dayside of the Full Earth.
The Big Corona
20 Sep 2017, 09:56 UTC
Most photographs don’t adequately portray the magnificence of the Sun’s corona. Seeing the corona first-hand during a total solar eclipse is unparalleled. The human eye can adapt to see coronal features and extent that average cameras usually cannot. Welcome, however, to the digital age. The featured picture is a combination of forty exposures from one thousandth of a second to two seconds that, together, were digitally combined and processed to highlight faint features of the total solar eclipse that occurred in August of 2017. Clearly visible are intricate layers and glowing caustics of an ever changing mixture of hot gas and magnetic fields in the Sun’s corona. Looping prominences appear bright pink just past the Sun’s limb. Faint details on the night side of the New Moon can even be made out, illuminated by sunlight reflected from the dayside of the Full Earth.
Photographing Space
20 Sep 2017, 09:23 UTC
Comets Conjunction ASASSN & PANSTARRS, by José J. Chambó Image details Comet C/2017 O1 ASASSN, down left, is observable by binoculars while approaching to perihelion showing a greenish coma of diatomic carbon and a small ionic tail. At same time comet C/2015 ER61 PANSTARRS, up right, moving away since four months ago and twice as far from Earth, can be still imaged with a long and narrow tail. Between both is glimpsed a shred of IFN (Integrated Flux Nebula) very near to Pleiades located next to field toward the top right. About the photographer José J. Chambó Location: Spain Website Want in on the action? Submit your image today! Previous The post Image of the Week, September 18, 2017 appeared first on PhotographingSpace.com.
Image of the Week, September 18, 2017
20 Sep 2017, 09:23 UTC
Comets Conjunction ASASSN & PANSTARRS, by José J. Chambó Image details Comet C/2017 O1 ASASSN, down left, is observable by binoculars while approaching to perihelion showing a greenish coma of diatomic carbon and a small ionic tail. At same time comet C/2015 ER61 PANSTARRS, up right, moving away since four months ago and twice as far from Earth, can be still imaged with a long and narrow tail. Between both is glimpsed a shred of IFN (Integrated Flux Nebula) very near to Pleiades located next to field toward the top right. About the photographer José J. Chambó Location: Spain Website Want in on the action? Submit your image today! Previous The post Image of the Week, September 18, 2017 appeared first on PhotographingSpace.com.
Universe @ CSIRO
19 Sep 2017, 23:28 UTC
Ah the Australian outback. Red dirt, bounding kangaroos and wide open spaces that seem to go on forever. Sure it’s a great place to explore that little slice of untouched Australia but it’s also the perfect place for our radio telescopes to explore the unknown Universe. It’s because of our southern hemisphere location on the planet, and our ability to manage large, complex facilities with a high degree of reliability, that we’ve been involved in some iconic events, from the Moon landing, to the Pluto flyby in 2015, to the last hurrah of Cassini as it plummeted into Saturn last week. Now we’re building a new generation of radio astronomy technology with our Australian Square Kilometre Array Pathfinder (ASKAP) telescope at the Murchison Radio-astronomy Observatory (MRO), in Western Australia about eight hours drive north-east of Perth. The ASKAP telescope is made up of 36 dish antennas, working together as a single instrument. Each antenna is fitted with a special ‘camera’, the CSIRO-designed phased-array feed, that is made up of 188 individual receivers. You can think of it as a bit like a wide-angle lens allowing you to see more through a single viewpoint. ASKAP is the fastest radio telescope in ...
Interference kills the radio star finder
19 Sep 2017, 23:28 UTC
Ah the Australian outback. Red dirt, bounding kangaroos and wide open spaces that seem to go on forever. Sure it’s a great place to explore that little slice of untouched Australia but it’s also the perfect place for our radio telescopes to explore the unknown Universe. It’s because of our southern hemisphere location on the planet, and our ability to manage large, complex facilities with a high degree of reliability, that we’ve been involved in some iconic events, from the Moon landing, to the Pluto flyby in 2015, to the last hurrah of Cassini as it plummeted into Saturn last week. Now we’re building a new generation of radio astronomy technology with our Australian Square Kilometre Array Pathfinder (ASKAP) telescope at the Murchison Radio-astronomy Observatory (MRO), in Western Australia about eight hours drive north-east of Perth. The ASKAP telescope is made up of 36 dish antennas, working together as a single instrument. Each antenna is fitted with a special ‘camera’, the CSIRO-designed phased-array feed, that is made up of 188 individual receivers. You can think of it as a bit like a wide-angle lens allowing you to see more through a single viewpoint. ASKAP is the fastest radio telescope in ...
NASASpaceFlight.com
19 Sep 2017, 23:25 UTC
More than two years after New Horizons flew past Pluto, becoming the first human-made object to visit the dwarf planet, numerous surface features discovered and explored by the craft now have official names as recognized by the International Astronomical Union. Meanwhile, New Horizons itself is preparing for its 1 January 2019 encounter with 2014 MU69, a distant Kuiper Belt Object – all while its control teams search for potential additional flyby targets after the MU69 encounter. Pluto surface features receive official names: When New Horizons made its historic flyby of Pluto on 14 July 2015, the return of spectacular images and awe inspiring landscapes immediately inspired the New Horizons team to assign names to the various regions of the dwarf planet. As with all things in astronomy and official naming practices for celestial bodies inside the solar system, the names given to these various regions were not official. Only the International Astronomical Union (IAU) holds the ability to officially name moons, planets, dwarf planets, asteroids, and their associated surface features. After more than two years, on 7 September 2017, the IAU officially recognized the first set of Pluto feature names, including one named after Pluto’s discoverer, Clyde Tombaugh, and another ...
New Horizons might get more flyby targets; Pluto features get official names
19 Sep 2017, 23:25 UTC
More than two years after New Horizons flew past Pluto, becoming the first human-made object to visit the dwarf planet, numerous surface features discovered and explored by the craft now have official names as recognized by the International Astronomical Union. Meanwhile, New Horizons itself is preparing for its 1 January 2019 encounter with 2014 MU69, a distant Kuiper Belt Object – all while its control teams search for potential additional flyby targets after the MU69 encounter. Pluto surface features receive official names: When New Horizons made its historic flyby of Pluto on 14 July 2015, the return of spectacular images and awe inspiring landscapes immediately inspired the New Horizons team to assign names to the various regions of the dwarf planet. As with all things in astronomy and official naming practices for celestial bodies inside the solar system, the names given to these various regions were not official. Only the International Astronomical Union (IAU) holds the ability to officially name moons, planets, dwarf planets, asteroids, and their associated surface features. After more than two years, on 7 September 2017, the IAU officially recognized the first set of Pluto feature names, including one named after Pluto’s discoverer, Clyde Tombaugh, and another ...
Universe Today
19 Sep 2017, 21:21 UTC
Venus’ atmosphere is as mysterious as it is dense and scorching. For generations, scientists have sought to study it using ground-based telescopes, orbital missions, and the occasional atmospheric probe. And in 2006, the ESA’s Venus Express mission became the first probe to conduct long-term observations of the planet’s atmosphere, which revealed much about its dynamics. Using this data, a team of international scientists – led by researchers from the Japan Aerospace and Exploration Agency (JAXA) – recently conducted a study that characterized the wind and upper cloud patterns on the night side of Venus. In addition to being the first of its kind, this study also revealed that the atmosphere behaves differently on the night side, which was unexpected. The 3D properties of these stationary waves were also obtained by combining VIRTIS data with radio-science data from the Venus Radio Science experiment (VeRa). Naturally, the team was surprised to find these kinds of atmospheric behaviors since they were inconsistent with what has been routinely observed on the dayside. Moreover, they contradict the best models for explaining the dynamics of Venus’ atmosphere. Known as Global Circulation Models (GCMs), these models predict that on Venus, super-rotation would occur in much the same ...
Venus Express Probe Reveals the Planet’s Mysterious Night Side
19 Sep 2017, 21:21 UTC
Venus’ atmosphere is as mysterious as it is dense and scorching. For generations, scientists have sought to study it using ground-based telescopes, orbital missions, and the occasional atmospheric probe. And in 2006, the ESA’s Venus Express mission became the first probe to conduct long-term observations of the planet’s atmosphere, which revealed much about its dynamics. Using this data, a team of international scientists – led by researchers from the Japan Aerospace and Exploration Agency (JAXA) – recently conducted a study that characterized the wind and upper cloud patterns on the night side of Venus. In addition to being the first of its kind, this study also revealed that the atmosphere behaves differently on the night side, which was unexpected. The 3D properties of these stationary waves were also obtained by combining VIRTIS data with radio-science data from the Venus Radio Science experiment (VeRa). Naturally, the team was surprised to find these kinds of atmospheric behaviors since they were inconsistent with what has been routinely observed on the dayside. Moreover, they contradict the best models for explaining the dynamics of Venus’ atmosphere. Known as Global Circulation Models (GCMs), these models predict that on Venus, super-rotation would occur in much the same ...
Centauri Dreams
19 Sep 2017, 17:16 UTC
When we think about the markers of possible life on other worlds, vegetation comes to mind in an interesting way. We’d like to use transit spectroscopy to see biosignatures, gases that have built up in the atmosphere because of ongoing biological activity. But plants using photosynthesis offer us an additional option. They absorb sunlight from the visible part of the spectrum, but not longer-wavelength infrared light. The latter they simply reflect.
‘Red Edge’ Biomarkers on M-dwarf Planets
19 Sep 2017, 17:16 UTC
When we think about the markers of possible life on other worlds, vegetation comes to mind in an interesting way. We’d like to use transit spectroscopy to see biosignatures, gases that have built up in the atmosphere because of ongoing biological activity. But plants using photosynthesis offer us an additional option. They absorb sunlight from the visible part of the spectrum, but not longer-wavelength infrared light. The latter they simply reflect.
All About Space
19 Sep 2017, 15:36 UTC
A false colour map of Mercury, taken by the MESSENGER spacecraft. Image credit: NASA The scorching hot surface of Mercury seems like an unlikely place to find ice, but research over the past three decades has suggested that water is frozen on the first rock from the Sun, hidden away on crater floors that are permanently shadowed from our nearest star’s blistering rays. Now, a new study led by Brown University researchers suggests that there could be much more ice on Mercury’s surface than previously thought. The study adds three new members to the list of craters near Mercury’s north pole that appear to harbour large surface ice deposits. But in addition, the research also shows evidence that smaller-scale deposits scattered around Mercury’s north pole, both inside craters and in shadowed terrain between impacts. Those deposits may be small, but they could add up to a lot more previously unaccounted-for ice. “The assumption has been that surface ice on Mercury exists predominantly in large craters, but we show evidence for these smaller-scale deposits as well,” says Ariel Deutsch, the study’s lead author and a Ph.D. candidate at Brown. “Adding these small-scale deposits to the large deposits within craters adds significantly ...
Mercury’s poles likely to hold more ice than previously thought
19 Sep 2017, 15:36 UTC
A false colour map of Mercury, taken by the MESSENGER spacecraft. Image credit: NASA The scorching hot surface of Mercury seems like an unlikely place to find ice, but research over the past three decades has suggested that water is frozen on the first rock from the Sun, hidden away on crater floors that are permanently shadowed from our nearest star’s blistering rays. Now, a new study led by Brown University researchers suggests that there could be much more ice on Mercury’s surface than previously thought. The study adds three new members to the list of craters near Mercury’s north pole that appear to harbour large surface ice deposits. But in addition, the research also shows evidence that smaller-scale deposits scattered around Mercury’s north pole, both inside craters and in shadowed terrain between impacts. Those deposits may be small, but they could add up to a lot more previously unaccounted-for ice. “The assumption has been that surface ice on Mercury exists predominantly in large craters, but we show evidence for these smaller-scale deposits as well,” says Ariel Deutsch, the study’s lead author and a Ph.D. candidate at Brown. “Adding these small-scale deposits to the large deposits within craters adds significantly ...
Sky and Telescope
19 Sep 2017, 14:57 UTC
The winking stars of the Pleiades are easy targets for backyard observers. They’re also frequent targets for professional ground-based telescopes, polarimeters, and interferometers. So it’s ironic that they’re some of the most difficult targets for sophisticated space-based telescopes. The hot blue stars of the Pleiades star cluster illuminate a large cloud of interstellar dust along the cluster's path. Davide De Martin & ESA / ESO / NASA Photoshop FITS Liberator Nowhere is that more true than for Kepler. The exoplanet-hunting satellite has monitored thousands of stars, but the brightest ones have largely remained out of its reach. Now, astronomers have come up with a new technique to change that. Engineers designed Kepler’s sensitive CCD cameras to catch minute changes in faint stars, in order to detect the tiny blips in light that indicate a planet transiting its sun. But that exquisite sensitivity means that Kepler has difficulty measuring brilliant stars such as Alcyone, Atlas, Electra, Maia, Merope, Taygeta, and Pleione — the “seven sisters” of the Pleiades. CCD cameras work by capturing photons in “wells,” with each well corresponding to a single pixel in the resulting image. If a plethora of photons come in, the well may overflow, “bleeding” into ...
Kepler Discovers Pulsations in the Pleiades
19 Sep 2017, 14:57 UTC
The winking stars of the Pleiades are easy targets for backyard observers. They’re also frequent targets for professional ground-based telescopes, polarimeters, and interferometers. So it’s ironic that they’re some of the most difficult targets for sophisticated space-based telescopes. The hot blue stars of the Pleiades star cluster illuminate a large cloud of interstellar dust along the cluster's path. Davide De Martin & ESA / ESO / NASA Photoshop FITS Liberator Nowhere is that more true than for Kepler. The exoplanet-hunting satellite has monitored thousands of stars, but the brightest ones have largely remained out of its reach. Now, astronomers have come up with a new technique to change that. Engineers designed Kepler’s sensitive CCD cameras to catch minute changes in faint stars, in order to detect the tiny blips in light that indicate a planet transiting its sun. But that exquisite sensitivity means that Kepler has difficulty measuring brilliant stars such as Alcyone, Atlas, Electra, Maia, Merope, Taygeta, and Pleione — the “seven sisters” of the Pleiades. CCD cameras work by capturing photons in “wells,” with each well corresponding to a single pixel in the resulting image. If a plethora of photons come in, the well may overflow, “bleeding” into ...
SPACE.com
19 Sep 2017, 12:00 UTC
CAPE CANAVERAL, Fla. — A tiny version of Mars on Earth is tucked inside the Space Life Sciences Lab here at NASA's Kennedy Space Center — a specialized simulation chamber that's helping scientists delve into the prospect of detecting life on the Red Planet.
Cold World, Hot Topic: Can Microbes Survive on Mars?
19 Sep 2017, 12:00 UTC
CAPE CANAVERAL, Fla. — A tiny version of Mars on Earth is tucked inside the Space Life Sciences Lab here at NASA's Kennedy Space Center — a specialized simulation chamber that's helping scientists delve into the prospect of detecting life on the Red Planet.
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