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Rossby waves on the Sun as revealed by solar `hills'

Kuhn, J. R.; Bush, R. I.; Scherrer, P. +1 more

It is a long-standing puzzle that the Sun's photosphere-its visible surface-rotates differentially, with the equatorial regions rotating faster than the poles. It has been suggested that waves analogous to terrestrial Rossby waves, and known as r-mode oscillations, could explain the Sun's differential rotation: Rossby waves are seen in the oceans …

Discovery of a comet by its Lyman-α emission

Bertaux, Jean-Loup; Laakso, Harri; Lallement, Rosine +6 more

Several searches for near-Earth objects have recently been initiated, as a result of increased awareness of the hazard of impacts on the Earth. These programs mainly search for asteroids, so amateur astronomers can still contribute to the discovery of comets, especially out of the orbital plane of the Solar System. An ideal way to search for comet…