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Newly measured proper motions of a dozen stars in the Sculptor dwarf galaxy provide important insight into its distribution of dark matter. This result was made possible by combining measurements of star positions from Hubble Space Telescope and Gaia data.
New spacecraft measurements show that the dust cycle plays a key role in driving upward transport of water vapour in the atmosphere of Mars and, consequently, Martian water loss to space.
A study suggests that the gas clouds in the vicinity of rapidly accreting supermassive black holes are distributed in a planar distribution, impacting the estimation of the mass of the black hole based on the motion of these clouds.
Long-term multi-wavelength monitoring of a jet from a supermassive black hole reveals that more intense periods of variability in brightness occur when the jet is pointed more directly at Earth, thereby strengthening the geometric interpretation of long-term changes in brightness.
