Articles

Paul Schenk

This year we achieve the first exploration of these curious but fascinating objects. Paul Schenk explains what we may learn about them.

Emily Lakdawalla

Looking ahead to what we can expect from Earth's exploration of the rest of the solar system in 2015, there's an obvious theme: Dwarf planets.

Emily Lakdawalla

It's been a long journey, but it's nearly over: New Horizons is just about ready to begin its science mission to Pluto, Charon, Styx, Nix, Kerberos, and Hydra. I'll remind you of New Horizons' capabilities and simulate how Pluto will appear in optical navigation images.

Jason Davis

When New Horizons wakes up for the final time on Dec. 6, scientists will spend six weeks preparing for the start of the spacecraft's Pluto encounter.

Emily Lakdawalla

What a huge relief: there is finally a place for New Horizons to visit beyond Pluto. A team of researchers led by John Spencer has discovered three possible targets, all in the Cold Classical part of the Kuiper belt. One is particularly easy to reach. New Horizons would fly past the 30-45-kilometer object in January 2019.

Emily Lakdawalla

What's that in the distance? A binary star? Those are two little round worlds dancing in circles, whirling around a point in space located between the two of them. It's Pluto and Charon, clearly separated by New Horizons' camera.

Emily Lakdawalla

Technically, Pluto science observations don't begin for New Horizons until 2015, but the spacecraft will take a series of photos of Pluto and Charon from July 20 to 27 as it begins the first of four optical navigation campaigns.

Emily Lakdawalla

Will New Horizons have a mission after Pluto? Ground-based searches have failed to turn up anything that New Horizons can reach. Now Hubble is joining the search, but time is running out: a discovery must be made within the next two months.

Simon Porter

New Horizons team member Simon Porter reports on the state of the mission and Pluto system science from the recent science team meeting at the Applied Physics Laboratory.

Emily Lakdawalla

We don't currently know whether Pluto is the biggest thing in the Kuiper belt or not. When will New Horizons give us the answer?

Amanda Zangari

Amanda Zangari shares what it's like to be a scientist on New Horizons, and explains some of the day-to-day workings of the mission behind the scenes.

Emily Lakdawalla

Why didn't we discover Pluto's moons until more than a decade after Hubble launched? Mark Showalter helps me answer this question.

Ted Stryk

Ted Stryk reports on the status of the New Horizons mission from the mission's latest Science Team Meeting. Updates include the status of the Kuiper Belt target search and the use of ALMA to refine Pluto's ephemeris.

Ted Stryk

Ted Stryk reports on the status of the New Horizons mission from the mission's latest Science Team Meeting.

Bill Dunford

When sent from deep space, even imperfect images can inform and amaze.

Emily Lakdawalla

With the New Year upon us, what can we look forward to in 2014? For me, the main event of 2014 is that ESA's Rosetta mission finally -- finally! -- catches up to the comet it has been chasing for a decade. We will lose LADEE, gain two Mars orbiters, and launch Hayabusa2. The year begins with an amazing 24 spacecraft exploring or cruising toward various planetary destinations.

Mat Kaplan

This week's Planetary Radio features artist Jon Lomberg inviting listeners to join the New Horizons Message Initiative.

Alan Stern

New Horizons has just completed a summer of intensive activities and entered hibernation on Aug. 20. The routine parts of the activities included thorough checkouts of all our backup systems (result: they work fine!) and of all our scientific instruments (they work fine too!).

Emily Lakdawalla

In which the fifth graders of Kipp Heartwood Academy argue the competing sides in the is-Pluto-a-planet debate through the medium of rap.

Emily Lakdawalla

Does Pluto have an ocean under its ice? If it doesn't now, did it ever have one? How will we know?