A new show at the Adler Planetarium tells the story of Planet Nine, by way of the Kuiper Belt.
Looking back at Pluto with images like this gives New Horizons scientists information about Pluto’s hazes and surface properties that they can’t get from images taken on approach.
This surprising finding may be an important clue to understanding those mysterious parts of the universe that make up 95 percent of everything and don’t emit light, such as dark energy, dark matter, and dark radiation.
This will open a whole new realm of research into how galaxies evolve and interact with their surroundings over cosmic time.
A new study finds that Galileo’s atmospheric probe may have stumbled into an anomalous structure just below the uppermost clouds.
In a reservoir that's likely several miles deep in some places, solid nitrogen warmed by Pluto's modest internal heat becomes buoyant and rises up in great blobs before cooling off and sinking again to renew the cycle.
A new study indicates the bodies of some periodic comets may regularly split in two, then reunite down the road.
This famous king of Egypt might have had a space dagger in his collection of relics
The mass of the Milky Way, so far, is 7 x 1011 solar masses.
Plans to get to Mars are nothing new. They're as old as NASA itself.
To find out what's going on around the weirdest star in the galaxy, astronomers are turning to crowdfunding.
A modest “webcam” on Mars Express has proven useful for outreach, education, and citizen-science. Now ESA has decided to adopt it as a professional science instrument.