The Mars 2020 rover has reached a third milestone on the path to the launch pad.
New observations solve a 30-year-old puzzle of mysterious signals from around black holes.
Astronomers take a second look at UGC 1382 – previously considered a typical elliptical galaxy – and reassess everything they know about its size, age, and formation.
On July 20, 1976, NASA’s Viking 1 lander touched down safely on Mars. The mission’s surviving scientists and engineers gathered this past week to celebrate the 40th anniversary of the landing.
Look for starry Scorpius, sometimes called “the Orion of Summer”, due south just after dark now.
Now you see ’em, now you don’t. Watch the Moon occult Neptune and nearby Lambda Aquarii on the same night.
Take a guided tour of July’s night sky. In early evening look for Jupiter in the southwest, with Mars and Saturn embedded in Scorpius toward south.
A world-renowned lunar cartographer, whose beautiful atlases have become prized possessions, has died at age 83.
The author turned her town into a model of the Milky Way Galaxy for a high school astronomy project.