Earth’s motion around the Sun impacts the light curves of microlensing events caused by free-floating planets passing in front of stars in our galaxy, as this study analyzing synthetic Roman data shows.
A months-long dust storm raised the temperature of Mars’s atmosphere and increased the density of atmospheric water vapor and carbon dioxide, affecting the location of the induced magnetospheric boundary.
Metallicity maps of the Sagittarius stream show a gradient in metallicity that corresponds to a radial metallicity gradient in the Sagittarius dwarf galaxy that was torn apart in the creation of the stream.
Cygnus X-1 is an X-ray binary and one of the first systems known to contain a stellar-mass black hole; modeling yields a variety of estimates for this black hole’s spin, ranging from less than 0.1 to 0.9.
A newly discovered exoplanet in the LHS 1678 system is about the size of Earth but receives far more radiation, placing it in its star’s “Venus zone” along with one of its planetary siblings.
Two massive quiescent galaxies that are among the brightest galaxies in their home cluster are in the process of merging; the merger product may well be the brightest galaxy in the cluster.