Occultations Suggest No Rings for Ultima Thule
Does the distant solar-system body Ultima Thule have rings? Previous observations may answer this question even before we see images from the New Horizons flyby.
Does the distant solar-system body Ultima Thule have rings? Previous observations may answer this question even before we see images from the New Horizons flyby.
Radio observations of the supermassive black hole at the center of the Milky Way have reached their highest resolution yet, teasing out details of this source’s structure.
Thanks to machine-learning algorithms, the star Kepler-90 has been found to host eight planets — as many as our own Sun.
New observations have provided the most precise measurement yet of how fast our universe is expanding.
Could we communicate with distant extraterrestrial intelligence using lasers? A new study says yes.
The discovery of starless galaxies may lend weight to one theory of galaxy formation.
J1622–4950, an ultra-magnetized neutron star that has been quiescent for three years, has now reawakened.
Using microlensing, scientists have discovered a population of free-floating planets located beyond our own galaxy.
Amateur astronomers have discovered a new faint galaxy lurking in a known field.
Long-term X-ray observations of our closest neighboring star system, Alpha Centauri AB, reveal these stars’ flaring histories.
In August 2017, we detected gravitational waves from the collision of two neutron stars. What can observations from the months after the event tell us about the presence or absence of relativistic jets?
There are a lot of Sun-like stars in the universe. Are they as identical as the name suggests, or are there important differences between them?