(Editor’s note: This is the first in a series of stories looking back on the days before, during and after Typhoon Mawar, which had its closest point of approach to Guam from 5 p.m. to 8 p.m. on ...

Sep. 10, 2025 — Hubble has uncovered a rare ultra-massive white dwarf created in a violent star merger. Once thought to be ordinary, the star’s ultraviolet signature revealed its explosive history and ...