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News About Stellar Chemistry
December 13, 2017
Galaxy Orbits in the Local Supercluster
Honolulu HI (SPX) Dec 08, 2017
A team of astronomers from Maryland, Hawaii, Israel, and France has produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1,400 galaxies within 100 million light-years of the Milky Way. The team reconstructed the galaxies' motions from 13 billion years in the past to the present day. The main gravitational attractor in the mapped area is the Virgo Cluster, with 600 trillion times the mass of the Sun, 50 million light-ye ... read more

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How does it look when Earth is bombarded with dark matter?
A whole lot of zig-zagging: Perhaps that is what happens when the universe's mysterious dark matter particles hit the Earth. SDU researchers can now show through simulations how it might look. ... more
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Chinese satellite closes in on dark matter mystery
Scientists have detected cosmic ray energy readings that could bring them closer to proving the existence of dark matter, a mysterious substance believed to comprise a quarter of our universe, a study said Thursday. ... more
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Massive primordial galaxies found swimming in vast ocean of dark matter
Astronomers expect that the first galaxies, those that formed just a few hundred million years after the Big Bang, would share many similarities with some of the dwarf galaxies we see in the nearby ... more
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How hardy is the Webb Telescope
Just how resilient does a space telescope have to be to survive both Earth's environment and the frigid, airless environment of space? Paul Geithner, the deputy project manager - technical for James ... more
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Stellar motions in nearby galaxy hint at underlying dark matter
By pinning down, for the first time, the three-dimensional motions of individual stars in the nearby Sculptor dwarf galaxy, astronomers have shed new light on the distribution of invisible dark matt ... more
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Webb Telescope emerges from Chamber A at JSC
The telescope's combined science instruments and optical element recently completed about 100 days of cryogenic testing inside Johnson's Chamber A, a massive thermal vacuum testing chamber at the ce ... more
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Model of galaxy and star cluster formation is rectified
When galaxy clusters and globular star clusters form, a phenomenon called "violent relaxation" occurs. After interacting intensely, the thousands or even millions of bodies reach a state of relative ... more
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Microscopy: A space-time sensor for light-matter interactions
Physicists from Ludwig-Maximilians-Universitaet (LMU) in Munich have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe ... more

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Scientists make transparent materials absorb light
A group of physicists from Russia, Sweden, and the U.S. has demonstrated a highly unusual optical effect: They managed to "virtually" absorb light using a material that has no light-absorbing capaci ... more
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Texas Astronomers Will Lead Early Studies with $8 Billion James Webb Space Telescope
NASA's James Webb Space Telescope, the powerful successor to the Hubble Space Telescope, is expected to launch in 2019 after decades of development. Now the agency has announced the scientists who w ... more
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Why is massive star formation quenched in galaxy centers?
The current cosmological model to explain our universe, the "Big Bang" model, aims to describe all the phenomena we observe, which includes the galaxies and their evolution from earliest times to th ... more
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First proper motions measured of stars in a small galaxy outside the Milky Way
By combining data from the Hubble Space Telescope and the Gaia mission, University of Groningen astronomers have been able to measure the proper motion of 15 stars in the Sculptor Galaxy, the first ... more
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MUSE probes uncharted depths of Hubble Ultra Deep Field
Astronomers using the MUSE instrument on ESO's Very Large Telescope in Chile have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances an ... more
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First finding of China's DAMPE may shed light on dark matter research
The Dark Matter Particle Explorer (DAMPE, also known as Wukong) mission published its first scientific results on Nov. 30 in Nature, presenting the precise measurement of cosmic ray electron flux, e ... more
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What's slowing the universe's star formation rate?
According to a new study, magnetic fields may explain why the universe's star formation rate is so much slower than those predicted by cosmic models. ... more
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Hubble and Gaia team up to measure 3-D stellar motion with record-breaking precision
A team of astronomers used data from both the NASA/ESA Hubble Space Telescope and ESA's Gaia satellite to directly measure the 3D motions of individual stars in a nearby galaxy. The achieved accurac ... more

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By saving cost and energy, the lighting revolution may increase light pollution
Municipalities, enterprises, and households are switching to LED lights in order to save energy. But these savings might be lost if their neighbours install new or brighter lamps. Scientists fear th ... more
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Astronomers reveal nearby stars that are among the oldest in our galaxy
Astronomers have discovered some of the oldest stars in our Milky Way galaxy by determining their locations and velocities, according to a study led by scientists at Georgia State University. ... more
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How Do You Find A Star Cluster? Easy, Simply Count The Stars
It's the perfect meeting of old and new. Astronomers have combined the latest data from ESA's Gaia mission with a simple analysis technique from the 18th century to discover a massive star cluster t ... more
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Icebound detector reveals how ghostly neutrinos are stopped cold
Famously, neutrinos, the nearly massless particles that are a fundamental component of the universe, can zip through a million miles of lead without skipping a beat. Now, in a critical measure ... more
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How the Earth stops high-energy neutrinos in their tracks
Neutrinos are abundant subatomic particles that are famous for passing through anything and everything, only very rarely interacting with matter. About 100 trillion neutrinos pass through your body ... more
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Researchers tunnel to a new light source
With concerns over moving to a clean energy platform worldwide with electric vehicles and renewables, the energy we consume, or should we say do NOT consume, is as important as the green energy we p ... more
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House hunting for the supernova event SN 2015J
Finally the site where the supernova SN 2015J exploded was found by an international team of astronomers including Vincenzo Testa from INAF (the Italian National Institute of Astrophysics). It ... more
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Zwicky Transient Facility sees "First Light"
A new robotic camera with the ability to capture hundreds of thousands of stars and galaxies in a single shot has taken its first image of the sky - an event astronomers refer to as "first light." ... more
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