The Winter 2020 issue (vol. 49 no. 1) of Mercury magazine is online for ASP members, featuring a goodbye to Spitzer, kicking off a busy decade for Mars, and paying tribute to Katherine Johnson.
Two interstellar travelers have visited the solar system in as many years—how many more are out there?
As protests continue to stall construction of the Thirty Meter Telescope on Hawaii’s Maunakea, where do we go from here?
NASA's Chandra X-ray Observatory reveals the relativistic engine driving the quadruple apparition.
A Chinese satellite got a historic view of the July 2 total solar eclipse from BEYOND Moon orbit.
How a mission designed to monitor climate change is also a prototype for a technique to detect gravitational waves. [Feature excerpt]
NASA's OSIRIS-REx gets a beautiful crescent view of the asteroid, revealing the incredible array of rocks on its surface.
On April 11, Israel’s dreams of landing its first spacecraft on the Moon ended after Beresheet crashed into the lunar surface—but it wasn't a failure, not by a long shot. [Feature excerpt]
After decades of wondering, the Event Horizon Telescope has revealed what a black hole really looks like. [Feature excerpt]