What If Planet Nine Is a Bowling-Ball-Sized Black Hole?

Some of the most distant rocks in our solar system act in a way that suggests there’s some massive object out there we haven’t been able to see. A planet? Maybe. But why not a small black hole? Read More >>

We’re Finally Learning More about MU69, the Strange, Flat Rock in the Outer Solar System

New Horizons mission scientists have released the first peer-reviewed results from their study of 2014 MU69, demonstrating just how “pristine” this object is. Read More >>

Neptune’s Smallest Moon Finally Has a Name: Hippocamp

Introducing Hippocamp – the smallest of Neptune’s seven inner moons. The recently discovered moon likely formed from a collision with another moon billions of years ago. Read More >>

Study Finds Weird Interstellar Object ‘Oumuamua Isn’t As Big As We Thought

Scientists have learned more about ‘Oumuamua, the hunk of matter that is the first known interstellar object to ever be detected by scientists within the boundary of the solar system. Specifically, observations performed by researchers using the Spitzer Space Telescope and published in The Astronomical Journal have determined that prior observations likely established too generous an upper boundary on how large it could be. Read More >>

Japan’s Hayabusa2 Spacecraft Successfully Deploys Landers to Asteroid Ryugu’s Surface

Two landers from the Japan Aerospace Exploration Agency (JAXA) have successfully touched down on the Ryugu asteroid after separating from the Hayabusa2 probe in orbit, and have begun transmitting images from the space rock’s surface. Read More >>

Watch NASA Launch Its Sun-Skimming Parker Solar Probe

The Parker Solar Probe blasted off from Cape Canaveral Air Force Station in Florida on Sunday, setting itself on course to become both the fastest human craft ever launched (in the neighbourhood of 430,000 miles per hour) and the first to probe the outer corona of the sun. Read More >>

These New Maps of Pluto and Its Moon Charon Are the Most Detailed Yet

By meticulously stitching together photos taken from two cameras aboard the New Horizons spacecraft, a team of scientists has compiled the most accurate maps of Pluto and Charon to date. Read More >>

We Might Need to Redefine ‘Planet’ Again

You may think you know what a planet is, but celestial bodies often refuse to fully comply with our artificial human labels. We all thought tiny Pluto was a planet, until the 2006 vote in which the International Astronomical Union (IAU) redefinition stripped it of its title. But when is something officially too big to be called a planet? Read More >>

Pluto Is All Lit Up In This New Composite Photo

You know when you've just broken up with someone, so you post the best selfie you can find? Looks like Pluto's getting over being dropped from the planetary Cool Club by doing exactly the same. Except it's not a selfie. Planets can't take selfies. Read More >>

These Are the First Glorious Images From Cassini’s Ring-Grazing Orbits

Last week, the Cassini spacecraft began a series of dramatic, “ring-grazing orbits” that will see it fly high over Saturn’s poles before diving perilously close to the gas giant’s rings. Now, NASA has received back the first images from this exciting chapter in Cassini’s last year of life—and they do not disappoint. Read More >>

Our Sun’s Quirky Tilt Means Planet Nine Might Actually Exist

New research links the odd and unexplained six-degree tilt of our Sun to an undiscovered planet in the outer reaches of our solar system. It’s even more evidence that planet Nine is for real. Read More >>

The Solar System Is Always Visible at Night With These Planetary String Lights

A stellar view of the night sky, including all of our celestial neighbours, is dependent on countless factors like light pollution, the weather, and even the time of year. But you can guarantee that all of the planets in our solar system are visible when you go stargazing with this planetary string light set created by ThinkGeek. Read More >>

What Was the Rosetta Mission?

After two years of science, the European Space Agency’s Rosetta mission ended yesterday in a gentle crash-landing. But if you haven’t been tracking this spacecraft’s movements as obsessively as we have, you might be wracking your brain this morning trying to remember what the Rosetta mission was. Read More >>

We’ve Never Seen The Solar Wind Like This Before

Like an endless blaze roaring forth from the gates of hell, the solar wind is majestic, awe inspiring, and terrifying. The only proof you need that the Sun is the one and true master of our solar system is this never-before-seen view of a torrent of charged particles bursting out of our star’s corona. Read More >>

The History of How We Discovered All the Planets in the Solar System

Satellites such as the Kepler have been working overtime to uncover hundreds of new planets in our galaxy. But how did we first discover the planets in our local volume of space? Here are the stories of how astronomers living hundreds of years ago discovered each planet in our solar system. Read More >>