Gas might keep the dwarf planet's subsurface ocean from freezing.
Short answer: Because we changed the definition of the word “planet” to better fit its meaning.
But we won't know until we get there.
It has to do with a surprisingly hazy atmosphere.
Scientists aren't just jerking you around—this is about something more than your childhood nostalgia
The heavy heart may have tipped the world over
Deep under the icy crust
This summer, the mission may get funding to travel to a mysterious rock at the edge of the solar system
Cathy Olkin talks about what New Horizons has seen and where it's going next
Charon is the real #SuperBloodMoon in latest New Horizons pics
Short answer: It depends who you ask
A total eclipse of the heart
The latest and greatest images from the New Horizons mission
So. Many. Things.
After nine years and three billion miles, here's what we're learning from it all
Even though I helped demote it
Witness history in the making
New Horizons scientist Leslie Young discusses what to expect from the flyby on Tuesday, and the 28-year wait leading up to it
Just 3.5 million miles to go!
The first color movies from New Horizons show Pluto and Charon in a weird waltz
And he thinks the upcoming flyby will prove it
This year's missions to the outer solar system are set to shake up the planetary family tree
What's on the horizon for the New Horizons spacecraft