Planet 9
Could Modified Gravity Be the Answer to Planet 9?
As students advance to higher and higher physics courses, they eventually learn that the simple Newtonian dynamics they learned about…
If Planet 9 has Moons, Would That Help Us Find It?
Planet 9 continues to remain elusive. This potential super-Earth-sized object in the outer Solar System is only hypothetical, as something…
Flying to (Hypothetical) Planet 9: Why visit it, how could we get there, and would it surprise us like Pluto?
In a recent study submitted to Earth and Planetary Astrophysics, an international team of researchers discuss the various mission design…
Planet 9 is Running out of Places to Hide
A search for Planet 9 found hundreds of potential candidates, but they are probably just clouds.
A 6-Year Search of the Outer Solar System Turns up 461 new Objects (but no Planet 9)
After six years of observing the cosmos, the Dark Energy Survey has announced that it is also responsible for discovering…
If Planet 9 is a Primordial Black Hole, We Might Be Able to See Flares When it Consumes Comets
A comet-eating black hole the size of a planet? It's possible. And if there's one out there in the distant…
Maybe the Elusive Planet 9 Doesn’t Exist After All
Oh Planet Nine, when will you stop toying with us? Whether you call it Planet Nine, Planet X, the Perturber,…
More Evidence that Planet 9 is Really Out There
What's going on in the distant reaches of our Solar System? Is there a Planet 9 out there? Out in…
The Record for the Most Distant Object in the Solar System has been Shattered. Introducing FarFarOut at 140 Astronomical Units
Remember Far Out, the distant planet at the far reaches of the Solar System, that was discovered in December, 2018?…
A Disc of Icy Material, not Planet 9, Might Explain the Strange Movements in the Outer Solar System
Is there or isn't there a Planet 9? Is there a planet way out on the outskirts of our Solar…