Chandra X-ray observations of the most distant blazar ever observed reveal extremely fast spectral variability — the first time this phenomenon has been seen in the X-ray emission of a flat-spectrum radio quasar.
The first of a series of works scouring the 34 billion measurements in an optical and infrared source catalog generated 527,055 “tracklets” from solar system objects, including main belt asteroids, Jupiter trojans, and Kuiper belt objects.
Simulations suggest that our solar system contains one ten trillionth of an Earth mass of newly captured interstellar material at any given time, while ten thousand times that amount remains from the Sun’s earliest days.
A widely used method for estimating the magnetic field strength from polarization measurements likely provides accurate results for strong magnetic fields but overestimates weak magnetic field strengths.
The presence of pulsars in globular clusters and wide binary systems suggests that some proportion of pulsars must receive only a gentle kick during their formation, as a stronger natal nudge would unbind them from their systems.
Giant star ι Draconis is known to host a planet with a 511-day orbit, but careful measurements of its subtle oscillations that constrained its radius, mass, and age also revealed a second planet with an orbital period of 68 years.