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    Category Astronomy/Space

    Gravity Waves Influence Weather and Climate

    September 25, 2017, Categories  Astronomy/Space

    Gravity waves form in the atmosphere as a result of destabilizing processes, for example at weather fronts, during storms or when air masses stroke over mountain ranges. They can occasionally be seen in the sky as bands of cloud. For weather forecast and climate models, however, they are mostly 'invisible' due to their short wavelength. Credit: Copyright Dr. Gerd Baumgarten

    Gravity waves form in the atmosphere as a result of destabilizing processes, for example at weather fronts, during storms or when air masses stroke over mountain ranges. They can occasionally be seen in the sky as bands of cloud. For weather forecast and climate models, however, they are mostly ‘invisible’ due to their short wavelength. Credit: Copyright Dr. Gerd Baumgarten

    Gravity waves form in the atmosphere as a result of destabilizing processes, for example at weather fronts, during storms or when air masses stroke over mountain ranges. They can occasionally be seen in the sky as bands of cloud. For weather forecast and climate models, however, they are mostly “invisible” due to their short wavelength...

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    NASA’S OSIRIS-REx Spacecraft Slingshots past Earth

    September 24, 2017, Categories  Astronomy/Space

    This artist's concept shows the OSIRIS-REx spacecraft passing by Earth. Credits: NASA's Goddard Space Flight Center/University of Arizona.

    This artist’s concept shows the OSIRIS-REx spacecraft passing by Earth. Credits: NASA’s Goddard Space Flight Center/University of Arizona.

    NASA’s asteroid sample return spacecraft successfully used Earth’s gravity on Friday to slingshot itself on a path toward the asteroid Bennu, for a rendezvous next August. At 12:52 p.m. EDT on Sept. 22, the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security – Regolith Explorer) spacecraft came within 10,711 miles (17,237 km) of Antarctica, just south of Cape Horn, Chile, before following a route north over the Pacific Ocean.

    OSIRIS-REx launched from Cape Canaveral Air Force Station in Florida on Sept. 8, 2016, on an Atlas V 411 rocket...

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    Positive, Negative or Neutral, it all matters: NASA explains Space Radiation

    September 24, 2017, Categories  Astronomy/Space

    Galactic cosmic rays (GCRs) are of most concern to NASA. It is challenging to shield against GCRs. They come from exploding stars called supernovae. Credit: NASA

    Galactic cosmic rays (GCRs) are of most concern to NASA. It is challenging to shield against GCRs. They come from exploding stars called supernovae. Credit: NASA

    Charged particles may be small, but they matter to astronauts. NASA’s Human Research Program (HRP) is investigating these particles to solve one of its biggest challenges for a human journey to Mars: space radiation and its effects on the human body. “One of our biggest challenges on a mission to Mars is protecting astronauts from radiation,” said NASA Space Radiation Element Scientist Lisa Simonsen, Ph.D.. “You can’t see it; you can’t feel it. You don’t know you’re getting bombarded by radiation.”

    A common misconception of space radiation is that it’s similar to radiation on Earth. It’s actually quite different...

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    Detecting Cosmic Rays from a Galaxy far, far away

    September 23, 2017, Categories  Astronomy/Space

    At the Pierre Auger Observatory in Argentina, cosmic rays have been detected from far off galaxies. Credit: Pierre Auger Observatory

    At the Pierre Auger Observatory in Argentina, cosmic rays have been detected from far off galaxies. Credit: Pierre Auger Observatory

    Where do cosmic rays come from? Solving a 50-year-old mystery, a collaboration of researchers has discovered it’s much farther than the Milky Way. In an article published today in the journal Science, the Pierre Auger Collaboration has definitively answered the question of whether cosmic particles from outside the Milky Way Galaxy. The article notes that studying the distribution of the cosmic ray arrival directions is the first step in determining where extragalactic particles originate.

    The collaborating scientists were able to make their recordings using the largest cosmic-ray observatory ever built, the Pierre Auger Observatory in Argentina...

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