Suggested Searches

Craters

Filters

6 min read

Enigmatic depressions on the surface have puzzled scientists since the 1970s For decades, scientists have been puzzling over strange hollows…

Oct 17, 2023

Article

News & Articles

Mercury’s Strange Hollows

Multimedia

Go To Galleries

Go To Galleries

Keep Exploring

Discover More Topics From NASA

GR SIG Seminar, 23 Jan 2026

Watch a cosmic gamma-ray fireworks show in this animation using just a year of data from the Large Area Telescope (LAT) aboard NASA’s Fermi Gamma-ray Space Telescope. Each object’s magenta circle grows as it brightens and shrinks as it dims. The yellow circle represents the Sun following its apparent annual path across the sky. The animation shows a subset of the LAT gamma-ray records now available for more than 1,500 objects in a new, continually updated repository. Over 90% of these sources are a type of galaxy called a blazar, powered by the activity of a supermassive black hole.Credit: NASA’s Marshall Space Flight Center/Daniel Kocevski

AGN Spotlight Series Talk, 27 Jan 2026

This composite of visible, microwave (orange) and X-ray (blue) data reveals the jets and radio-emitting lobes emanating from Centaurus A's central black hole. Credit: ESO/WFI (visible); MPIfR/ESO/APEX/A.Weiss et al. (microwave); NASA/CXC/CfA/R.Kraft et al. (X-ray)

Reminder: Deadlines for Fermi, NuSTAR, and ADAP

Reminder: Deadlines for Fermi, NuSTAR, and ADAP

Astrophysics Small Explorer AO Update

Astrophysics Small Explorer AO Update