Detailed calculations reveal a surprise about how black holes bend light around themselves, opening a new possibility for future observations.
Persistent tremors on Mars suggest the planet’s interior is cooling and hint that there might be a pocket of magma beneath the surface.
Astronomers have calculated the loss of planets around stars in globular clusters, and New Horizons returns observations of worlds in the outer solar system.
Two studies support the suspicion that our galaxy’s black hole had one or more outbursts a few million years ago.
Astronomers think a jet-powered rocking motion could solve the puzzle.