Magazine

Exoplanets, Planets, Solar System

Web Extra: Mercury in the spotlight

Astrophotography

To invert or not?

Robotic Spaceflight

Has NASA kept track of the orbits of the Mariners and Rangers that missed the Moon? Do they know where they are and if they would return to Earth?

Exoplanets, Planets

How much does the rotation of our planet affect weather patterns and ocean currents?

Robotic Spaceflight

Why doesn’t NASA reuse space probe designs from successful missions like Cassini, New Horizons, and the Mars rovers? Using the same design and tweaking for landing on different planets or orbiting them would seemingly make the entire endeavor cheaper.

Stars

See the Pup

Alien Life

The octopus and E.T.

Science

In the protoplanetary disk, pebbles turn from rocks to asteroids to planetesimals. How do you get pebbles?

Observing

Web Extra: Find where to observe in your neighborhood

Galaxies, Milky Way

Weird Object: Fermi Bubbles

Cosmology

Weird Object: Our Accelerating Universe

Science

Vote for the Top Space Stories of 2015