A study of solar flares finds no clear correlation between the three-dimensional magnetic free energy and the peak flux of a flare; random perturbations may trigger flares rather than a simple release of pent-up energy.
New JWST data reveal the star formation history of the Local Group galaxy Wolf–Lundmark–Melotte and yield the deepest color–magnitude diagram for any galaxy other than Milky Way satellites.
JWST data improve upon past ground-based data of the five Trojan asteroids that will be visited by NASA’s Lucy mission; the next Lucy mission flyby will take place in April 2025.
A search for the hypothesized Planet Nine has found no planet with the predicted characteristics; 78% of the parameter space for this planet has now been ruled out.
The upcoming Galactic Bulge Time Domain Survey is posed to discover extended structures composed of dark matter, such as dark matter subhalos, boson/axion stars, and halo-dressed primordial black holes.
New work shows how the total free magnetic energy, the length of the polarity inversion line, and other factors can predict whether a solar active region will generate a C-, M-, or X-class solar flare.