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Planetary science intern leads study of Martian crust


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The planet Mars has no global magnetic field, although scientists believe it did have one at some point in the past. Previous studies suggest that when Mars global magnetic field was present, it was approximately the same strength as Earth s current field. Surprisingly, instruments from past Mars missions, both orbiters and landers, have spotted patches on the planet s surface that are strongly magnetized a property that could not have been produced by a magnetic field similar to Earth s, assuming the rocks on both planets are similar.
Ahmed AlHantoobi, an intern working with Northern Arizona University planetary scientists, assistant professor Christopher Edwards and postdoctoral scholar Jennifer Buz in NAU s Department of Astronomy and Planetary Science, led a study looking for answers to explain these magnetic anomalies. The team explored the relationships between the strength of the magnetic field on the surface and the composition of the crust in the Terra ....

United States , United Arab Emirates , Northern Arizona University , Jennifer Buz , Ahmed Alhantoobi , Christopher Edwards , Emirates Mars Mission Hope , Geophysical Research Letters , Department Of Astronomy , Khalifa University , Arizona State University , Planetary Science , Terra Sirenum Cimmeria , Crustal Magnetization , United Arab Emirates Mohammed , Rashid Space Centre , While Alhantoobi , Space Planetary Science , Planets Moons , Comets Asteroids , Satellite Missions Shuttles , Experiments In Space , Stars The Sun , ஒன்றுபட்டது மாநிலங்களில் , ஒன்றுபட்டது அரபு அமீரகங்கள் , வடக்கு அரிசோனா பல்கலைக்கழகம் ,

"Cosmic Queries" With Neil deGrasse Tyson


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How did life begin? Are we alone in the universe? How will it all end? In his new book, Cosmic Queries: StarTalk’s Guide to Who We Are, How We Got Here, and Where We’re Going, world-renowned astrophysicist Neil deGrasse Tyson breaks down challenging philosophical conundrums with wit, wisdom, and cutting-edge science.
Neil deGrasse Tyson is an astrophysicist and the Frederick P. Rose Director of the Hayden Planetarium at New York’s American Museum of Natural History. He is the author of more than a dozen books many of them international bestsellers and numerous articles, both scholarly and for the general public. ....

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Astrophysicist's 2004 theory confirmed: Why the Sun's composition varies


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IMAGE: The solar corona viewed in white light during the total solar eclipse on Aug. 21, 2017 from Mitchell, Oregon. The moon blocks out the central part of the Sun, allowing.
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Credit: American Astronomical Society (AAS)
WASHINGTON About 17 years ago, J. Martin Laming, an astrophysicist at the U.S. Naval Research Laboratory, theorized why the chemical composition of the Sun s tenuous outermost layer differs from that lower down. His theory has recently been validated by combined observations of the Sun s magnetic waves from the Earth and from space.
His most recent scientific journal article describes how these magnetic waves modify chemical composition in a process completely new to solar physics or astrophysics, but already known in optical sciences, having been the subject of Nobel Prizes awarded to Steven Chu in 1997 and Arthur Ashkin in 2018. ....

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