Blog Archive

New Horizons: Encounter Planning Accelerates

Posted by Alan Stern on 2013/05/17 10:18 CDT | 3 comments

Back in 2005 and 2006, when Pluto’s second and third moons (Nix and Hydra) were discovered, searches by astronomers for still more moons didn’t reveal any. So the accidental discovery of Pluto’s fourth moon by the Hubble Space Telescope in mid-2011 raised the possibility that the hazards in the Pluto system might be greater than previously anticipated.

Pluto's seasons and what New Horizons may find when it passes by

Posted by Emily Lakdawalla on 2013/05/02 03:42 CDT | 2 comments

New Horizons might see a Pluto with a northern polar cap, a southern polar cap, or both caps, according to work by Leslie Young.

When will New Horizons have better views of Pluto than Hubble does?

Posted by Emily Lakdawalla on 2013/02/18 04:22 CST | 7 comments

Last week, I posted an explainer on why Hubble's images of galaxies show so much more detail than its images of Pluto. Then I set you all a homework problem: when will New Horizons be able to see Pluto better than Hubble does? Here's the answer.

Why can Hubble get detailed views of distant galaxies but not of Pluto?

Posted by Emily Lakdawalla on 2013/02/14 12:37 CST | 15 comments

How come Hubble's pictures of galaxies billions of light years away are so beautifully detailed, yet the pictures of Pluto, which is so much closer, are just little blobs? I get asked this question, or variations of it, a lot. Here's an explainer.

New Contest: Name the Moons of Pluto!

Posted by Emily Lakdawalla on 2013/02/11 11:41 CST | 15 comments

The discoverers of Pluto's fourth and fifth moons are inviting the public to vote on (and write in candidates for) their formal names. Voting closes in two weeks.