Physics & Astronomy News

<p>Schematic view of a bubble implosion, which is an envisioned picture showing the whole main events integrated, i.e., laser illumination, hot electron spread, implosion, and proton flash. (credit/ M. Murakami)</p>
Laser-driven Implosion
Scientists have discovered a novel particle acceleration mechanism called ‘micro-bubble implosion’
<p>Owens Valley Solar Array (EOVSA)</p>
New Insights into Solar Flares
New insights into solar flares' explosive energy releases were released by the Owens Valley Solar Array (EOVSA)

<p>In this illustration, the grid in the background represents the computational lattice that theoretical physicists used to calculate a particle property known as nucleon axial coupling. This property determines how a W boson (white wavy line) interacts with one of the quarks in a neutron (large transparent sphere in foreground), emitting an electron (large arrow) and antineutrino (dotted arrow) in a process called beta decay. This process transforms the neutron into a proton (distant transparent sphere). (Credit: Evan Berkowitz/Jülich Research Center, Lawrence Livermore National Laboratory)</p>
Life and Death of a Neutron
Experiments that measure the lifetime of neutrons reveal a perplexing and unresolved discrepancy.
<p>Precision assembly and mechanical technician Ryan Wilkinson inspects MOMA during thermal vacuum testing at Goddard</p>

<p>Credits: NASA</p>
Looking for Signs Life on Mars
Scientists have created a tiny chemistry lab for a rover that will drill beneath the Martian surface looking for signs of past or present life.

Massive Black Hole Devours a Star
Scientist create new models of Tidal Disruption Events - rare, but extremely forceful events taking place in the center of galaxies.
Dark Matter Limit Established
Experimental results from the XENON1T dark matter detector limit the effective size of dark matter particles to 4.1X10-47 square centimeters.
Water is not the same as water
Researchers have succeeded in separating the two forms of water to show that they can exhibit different chemical reactivities.

Science Facts

The First Starlight

by NASA Marshall Space Flight Center and

Color image of the Antennae galaxies (NGC 4038/4039): Image Courtesy NSSDC Imagine being able to see our Universe 14 billion years ago when it was just a baby. If we had a time machine, we could go back and watch how its infant features emerged after the Big Bang. There are many questions about that early time: Which came first, stars or galaxies? Did stars appear one at a time, or in massive flurries of simultaneous creation? Scientists have theories, but how wonderful it would be to actually look back in time and see for certain.

Well believe it or not, time machines do exist -- they're called telescopes. Astronomers who peer through them see stars and galaxies not as they are now, but as they appeared when the starlight began its journey. Through telescopes, astronomers can 'travel' billions of years into the past.

Astronomer Richard Ellis of the California Institute of Technology recently used NASA's Hubble Space Telescope to travel backwards nearly to the time of the Big Bang itself. He and his colleagues went in search of newborn stars -- the first ones to appear in our Universe. Ellis explains: 'At some point a billion or so years after the Big Bang, gravitational attraction caused the gas that filled the Universe to collapse and form the first stars. Searching for signs of those stars, which we call First Light, is one of the most interesting challenges in modern astronomy.

Sibling Rivalry: A Mars/Earth Comparison

Scientific understanding is often a matter of making the right comparisons. In terms of studying the Earth, one of the best comparative laboratories exists one planet over--on Mars. In many ways, the ...
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Image of the Sun
Will the Sun Shine Forever?

The Sun is a huge nuclear furnace. It operates by converting hydrogen into helium. In this process, which is called nuclear fusion, it loses mass and produces energy according to Einstein's famous equ ...
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The Sun’s Corona

The White-Light Corona - The Corona is the Sun's outer atmosphere. It is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun. The corona displays a variety of features ...
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Science Quote

'As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.'

Albert Einstein

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