Twilight’s once soft cerulean glow is now ... reaches an altitude of about 6°, when it blends into the darkening sky background and fades from view. But when volcanic ash fogs up the ...

That dazzling streak of light across Los Angeles’ twilight sky around 7:30 p.m. on Monday was Space X’s Falcon 9 carrying 22 Starlink satellites to low-Earth from Vandenberg Space Force Base.