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  • The Advanced Space-based Solar Observatory (ASO-S), which will focus on solar eruptions and their origins, is scheduled for launch in late 2022, explain Chief Scientist Weiqun Gan and assistants Li Feng and Yang Su.

    • W. Q. Gan
    • L. Feng
    • Y. Su
    Mission Control
  • Nature Astronomy turned five this month. We share some of our most popular covers and impactful papers, and look forward to more discoveries in 2022.

    Editorial
  • The combination of hydrogen and carbon dioxide in the ocean of Enceladus represents chemical energy that could support life — but should we expect to see any energy ‘left on the table’ if anything alive is actually there to use it?

    • Tori M. Hoehler
    Comment
  • There is an ongoing debate as to whether ultra-diffuse galaxies are regular dwarf galaxies with low star formation or massive ‘failed’ objects that quenched their star formation in the early Universe. Current evidence seems to support the former scenario.

    • Ignacio Trujillo
    Comment
  • If nothing else, 2021 has taught us to expect the unexpected. But what exactly are we expecting next year?

    Editorial
  • The Milky Way, Andromeda and Centaurus A host flattened arrangements of satellite dwarf galaxies with correlated kinematics. The rarity of similar structures in cosmological simulations constitutes a major problem for the ΛCDM model, with no obvious solution in sight.

    • Marcel S. Pawlowski
    Comment
  • The existence of planes of satellites has been a cosmological surprise. However, evidence for stable, long-lived satellite planes is generally tenuous, and they are unexpected in all current models of galaxy formation.

    • Michael Boylan-Kolchin
    Comment
  • In the past 20 years, the discovery and characterization of the smallest galaxies have pushed the edges of observational endeavours and theoretical advancements alike, and they will continue to be at the forefront of this field for years to come.

    • Denija Crnojević
    • Burçin Mutlu-Pakdil
    Comment
  • Alongside its role in astronomical research, the newly commissioned 32-m radio telescope is being used as an outreach tool for astronomy education in Ghana. The observatory also serves as a facility for international postgraduate programmes.

    • R. Aworka
    • E. Proven-Adzri
    • E. Aggrey
    Comment
  • Averting the imminent climate crisis requires large reductions in greenhouse gas emissions within this decade. To provide a benchmark for reduction and to identify the main sources, we estimate the carbon footprint of astronomy research in the Netherlands over 2019.

    • Floris van der Tak
    • Leo Burtscher
    • Arno Schoenmakers
    Comment