A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The 100 years since the publication of Albert Einstein's theory of general relativity saw
significant development of the understanding of the theory, the identification of potential …

We present cosmological results from the measurement of baryon acoustic oscillations
(BAO) in galaxy, quasar and Lyman-α forest tracers from the first year of observations from …

Context. Data from the Gaia satellite are revolutionising our understanding of the Milky Way.
With every new data release, there is a need to update the census of open clusters. Aims …

Abstract The Dark Energy Spectroscopic Instrument (DESI) was designed to conduct a
survey covering 14,000 deg 2 over 5 yr to constrain the cosmic expansion history through …

This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky
Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the …

The goal of the Dark Energy Spectroscopic Instrument (DESI) is to determine the nature of
dark energy through the most precise measurement of the expansion history of the universe …

Context. We present the third data release of the European Space Agency's Gaia mission,
Gaia DR3. This release includes a large variety of new data products, notably a much …

Measurement of the distances to nearby galaxies has improved rapidly in recent decades.
The ever-present challenge is to reduce systematic effects, especially as greater distances …

Over the next 5 yr, the Dark Energy Spectroscopic Instrument (DESI) will use 10
spectrographs with 5000 fibers on the 4 m Mayall Telescope at Kitt Peak National …