NASA image: Giant landform on Mars

(Phys.org) —Sandy landforms formed by the wind, or aeolian bedforms, are classified by the wavelength—or length—between crests. On Mars, we can observe four classes of bedforms (in order of increasing wavelengths): ...

Mapping dark matter from galactic ripples

(PhysOrg.com) -- Sukanya Chakrabarti, Ph.D., an assistant professor of physics for the Charles E. Schmidt College of Science at Florida Atlantic University, has developed a way to discover and map dark matter in galaxies. ...

Gravitational waves that are 'sounds of the universe'

Einstein wrote about them, and we're still looking for them -- gravitational waves, which are small ripples in the fabric of space-time, that many consider to be the sounds of our universe.

Japan's supply chain ripple effects

This past Monday marked the one-month anniversary of the earthquake that struck Japan on March 11. As the country braces for aftershocks in the months to come, businesses around the world are steeling themselves against ripples ...

Mars Dunes: On the Move?

(PhysOrg.com) -- New studies of ripples and dunes shaped by the winds on Mars testify to variability on that planet, identifying at least one place where ripples are actively migrating and another where the ripples have been ...

Rare noctilucent clouds seen over Northern Ireland

Armagh Observatory reports that rare noctilucent clouds were observed over Northern Ireland on the night of the 30/31 May. The so-called "night shining" clouds take various forms ranging from delicate feathery structures ...

Transverse instability of megaripples

Aeolian ripples, which form regular patterns on sand beaches and desert floors, indicate the fundamental instability of flat sand surfaces under the wind-induced transport of sand grains.

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