Nearly all — 99.6% — of the 72,964 unobscured quasar candidates in a new catalog of the southern sky have never been previously identified as such via spectroscopy.

Using JWST transit observations, researchers have determined that a low-density “super-puff” exoplanet is rotating slower than expected based on certain theories of these planets’ origins.

Scattering of photons in Earth’s atmosphere makes it challenging to assess balloon-borne gamma-ray observations, and modeling shows that scattering is especially impactful for lower energies.

Laboratory studies suggest that crystals of halite — the mineral form of sodium chloride and an unrefined version of table salt — may be the best way to preserve and transport potential Martian microbial life.

Inferred yields of oxygen and iron from core-collapse supernovae agree with expectations for a model in which many stars that are lighter than 40 solar masses implode rather than explode.

The five newly discovered dwarf galaxies are star forming, blue, and gas rich, and they are all curiously aligned in a straight line across the plane of the sky, with three of them rotating in the same direction.