Both of Friday’s Astronomical Unit lectures are related to celestial phenomena not discernible to human senses. David ...

This infrared view offers the clearest look yet at how dwarf galaxies merge, evolve, trade gas and ignite waves of new stars.

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Astronomers have sighted the oldest known stellar explosion, dating back to when the universe was less than a billion years ...

Astronomical images could be blemished by bright streaks, if plans for huge numbers of satellites go ahead — plus, the ...

New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may ...

Overall, the experience reinforced that floppy disks aren’t interchangeable carriers; they are unique artifacts with their ...

Fleets of satellites interfere with snapshots taken by Earth-bound observatories. But a new study suggests these orbiters ...