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  • The precise location of megamaser emission regions in galactic accretion disks has been challenging to pinpoint. Now with interferometric observations leveraging baselines larger than the Earth’s diameter, the missing information is getting closer and closer.

    • C. M. Violette Impellizzeri
    News & Views
  • A unified theory of particle transport by wind can explain the observations of aeolian features, like dunes, across the Solar System rocky bodies with atmospheres.

    • Hezi Yizhaq
    • Simone Silvestro
    News & Views
  • Conflicting results in measurements of the global spectrum of the hydrogen 21-cm line may indicate that there are large systematic errors. A different experimental approach to reach the redshifted signal from cosmic dawn assesses possible systematic errors together with the signal.

    • Xuelei Chen
    News & Views
  • Certain types of strongly star-forming galaxies have long been thought to lie outside the usual trends in metal abundances followed by other galaxies. A study now reveals the significant effect of dust on observations, bringing these galaxies back into line with models.

    • François Hammer
    News & Views
  • Recent advances in plasma turbulence theory have led to a new way of explaining the heating of the solar corona and many of the observed features of the solar wind.

    • Christopher H. K. Chen
    News & Views
  • The Rosetta mission to comet 67P/Churyumov–Gerasimenko found unexpectedly high concentrations of molecular oxygen in its atmosphere. New results show that these concentrations are enhanced by a cycle of trapping and releasing of molecular oxygen just below the comet’s surface.

    • Dennis Bodewits
    • Mohammad Saki
    News & Views
  • Machine-learning methods are used to provide a more unified picture of mathematical degeneracies in light curves of planetary microlensing events.

    • Przemek Mróz
    News & Views
  • Accretion is the process that dictates the mass, and therefore final fate, of a forming star. Now, it seems that the number of stars forming in a system can affect and even induce accretion throughout the star-formation process.

    • Abigail J. Frost
    News & Views
  • It has been generally thought that small icy bodies in the outer Solar System were chemically inactive due to its coldness. Laboratory experiments change this view by showing that water–rock interactions occur even in ice–rock mixtures.

    • Yasuhito Sekine
    News & Views
  • The Sun’s surface hosts varying magnetic activities and rotation rates (from equator to pole), and unique solar weather. Now, a combination of ground and space observations has unveiled a previously undetected magnetized plasma current.

    • L. Bugnet
    News & Views
  • A protoplanet seen forming at some distance from its star provides evidence for planet formation via gravitational instability, a mechanism previously invoked for being responsible for the fully formed gas giant planets at large separations seen by direct imaging.

    • Christian Ginski
    News & Views
  • An individual star at extremely high redshift is observed due to gravitational lensing by a foreground galaxy cluster, magnifying it by a factor of over a thousand.

    • Kenneth C. Wong
    News & Views
  • Conflicting methodologies for estimating the CO2 intensity of the space sector are beginning to emerge because of a lack of publicly available data, resulting in extensive variations that undermine the credibility of reported results.

    • Andrew Ross Wilson
    News & Views
  • Six out of the eight planets of the Solar System have moons, which are inextricably linked to the planets’ formation. Finding moons of exoplanets is a new way to explore their origins.

    • Daniel C. Fabrycky
    News & Views
  • Oxygen is the building block of key species in planetary atmospheres and a potential life indicator. Ground-based spectroscopy is now used to detect oxygen on an ultra-hot Jupiter and to prove departure from thermochemical equilibrium.

    • Matteo Brogi
    News & Views