kuiper belt

A Newly-Discovered (Almost) Dwarf Planet Will Come Surprisingly Close in 2031

It’s good to remember how little we know about the outer solar system.  Humans only really began observing it within…

4 months ago

New Horizons is Now 50 Astronomical Units Away From the Sun

As the New Horizons spacecraft hurtles out towards interstellar space, it has now reached an historical milestone. On April 17,…

6 months ago

Comets Already Grow a Coma out in the Kuiper Belt

Just when do comets get their signature coma? Conventional wisdom says it only happens when they get close enough to…

7 months ago

New Horizons Saw the Universe With Even Less Light Pollution than Hubble’s View

A new study based on New Horizons data has conducted the most accurate measurements of the Universe's background light to…

11 months ago

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…

1 year ago

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,…

1 year ago

Over a Hundred New Large Objects Found in the Kuiper Belt

Hey Pluto, Sedna, Haumea, Makemake Et al.: You’ve got company! While searching for distant galaxies and supernovae, the Dark Energy…

2 years ago

New Horizon’s Flyby Target 2014 MU69 Gets its Official Name: Arrokoth

The KBO formerly known as Ultima Thule (2014 MU69) has officially been named "Arrokoth", the traditional Powhatan-Algonquin language.

2 years ago

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…

3 years ago

Here it is, the high resolution photo of MU69 we’ve all been waiting for.

A newly-processed image of Ultima Thule provides the highest-resolution picture of the object to date.

3 years ago