Stories, updates, insights, and original analysis from The Planetary Society.
We’re always learning more about the worlds of the outer Solar System, and even those beyond.
Meet the Solar System’s five official dwarf planets, celebrate two major launches, and find out why planets sometimes seem to go backwards across the sky.
The International Astronomical Union currently recognizes five dwarf planets: Ceres, Pluto, Haumea, Makemake, and Eris.
Frost happens throughout the Solar System, creating beautiful views. Learn why and check out the latest in space news.
Our new list of Space Life Goals will help inspire your passion for space. Catch up on this week’s space news, and tick off a few goals while you’re at it.
NASA’s James Webb Space Telescope (JWST) will soon give us valuable data on the dozens of distant objects found beyond the orbit of Neptune in a region known as the Kuiper belt.
Pluto, everyone’s favorite former planet, takes center stage in this week’s Downlink.
With space missions like JWST and Voyager, decades of development yield decades of discovery.
Feast your eyes on these images from space, catch up on the latest in exploration news, and get the lowdown on what’s up in the night sky.
The mission includes a flyby of Neptune and measurements of the heliosphere, the electrically charged gas bubble surrounding our solar system
The LSST is expected to increase the number of known small bodies by more than a factor of 10.
Gonggong is the fan favorite name for this icy distant world, but the International Astronomical Union's (IAU) Committee for Small-Body Nomenclature has the final say.
It’s time to give 2007 OR10 a name. We’re asking for your help to pick a suitable name for the largest as-yet-unnamed solar system world to submit to the International Astronomical Union (IAU).
A crescent view of MU69 reveals its bizarre shape. Let's look at lots of other fun-shaped space crescents.
New Horizons is back in action after going quiet for a period of solar conjunction following the 1 January flyby of 2014 MU69 (informally nicknamed
The latest images downlinked from New Horizons show MU69 to be a textbook example of a contact binary. How do contact binaries form? Updated with images released on 3 January.
New Horizons has
Unaffected by the shutdown of the U.S. government, New Horizons is still on course for its New Year’s encounter with 2014 MU69 (nicknamed “Ultima Thule”). This post collects the latest images from New Horizons' approach to the tiny Kuiper belt object and will be updated regularly.
New Horizons is rapidly approaching its New Year’s encounter with the most distant world ever visited, 2014 MU69. Closest approach will be at a distance of 3,500 kilometers at about 05:33 on 1 January UTC.
A collection of before and after slider images showing how views of planets in our solar system have changed over the years since NASA was created.