Astronomers have discovered a satellite galaxy of our Milky Way, dubbed Virgo I, that's very small, faint and far away. The discovery implies that hundreds more such objects are waiting to be found.
NASA has released a lovely gallery of striking cloud formations. These are not your puffy everyday floating bags of water.
Astronomers have found an astonishing seven Earth-sized planets orbiting a single star just 40 light-years away! This is one of the most common kinds of stars in the galaxy, implying systems like this may outnumber our own.
A group of astronomers is proposing a new definition of what a "planet" is, which would now include Pluto ... as well as a hundred other solar system objects. This is a definition we want, but is it a definition we need?
Sometime between 2012 and 2016 a one-meter wide asteroid slammed into the surface of Mars, creating one the planet's youngest impact craters.
SpaceX successfully launched a Falcon 9 rocket on their tenth resupply mission to the International Space Station. The first stage booster also made a dramatic landing, this time on solid ground as it punched right through a low cloud deck.
"Pulse", a breath-taking time-lapse animation of storms by Mike Olbinski, is even more dramatic in grayscale.
NGC 7640 is a gorgeous spiral galaxy in the constellation of Andromeda. A new Hubble image reveals stars aplenty ... and a little bit about ourselves.
Arrival is a terrific science fiction movie, and our own Phil Plait had (an admittedly) small influence on it.
Some asteroids share orbits with planets in special places called Lagrange points. Almost every planet has these so-called Trojan asteroids. Does Earth? We know of one, but the OSIRIS-REx mission may be about to find a lot more.