Articles

Emily Lakdawalla

NASA held a press briefing today to explain the nature and cause of the spacecraft anomaly that halted science on New Horizons for four days as it was on its terminal approach to Pluto. As of the moment that I write this post, New Horizons is not yet performing science observations, but it will resume them tomorrow, July 7.

Emily Lakdawalla

Only two days remain until New Horizons' historic encounter with Pluto....two Pluto days, that is. Pluto and Charon rotate together once every 6.4 days, so as New Horizons has approached the pair over the last week, we've been treated to one stately progression of all of their longitudes.

Bruce Betts

For Asteroid Day, Bruce Betts reviews 5 steps needed to prevent asteroid impacts, as well as how The Planetary Society is involved in those.

Marc Rayman

Dawn is continuing to unveil a Ceres of mysteries at the first dwarf planet discovered. Mission Director Marc Rayman gives us an update.

Emily Lakdawalla

Three months ago, I posted an article explaining what to expect during the flyby. This is a revised version of the same post, with some errors corrected, the expected sizes of Nix and Hydra updated, and times of press briefings added.

Emily Lakdawalla

Only about three weeks remain until the flyby — it's getting really close! I almost don't want the anticipation to end. New Horizons is now getting color images and is seeing features on Charon. Deep searches have yielded no new moons.

Emily Lakdawalla

I woke up early Sunday morning to the dramatic news: Philae is back! With a few days to consider the telemetry, the Philae team is now talking about the science they hope to do. With comet Churyumov-Gerasimenko approaching perihelion in August, it's going to be an exciting ride.

Emily Lakdawalla

I've spent a happy couple of days playing with raw data downloaded from the New Horizons website, making animations of the dances of Pluto and Charon.

Mark Showalter

Mark Showalter explains how determining basic information about Pluto's small moons—Kerberos and Styx—is more complicated than initially thought.

Emily Lakdawalla

Pluto and Charon are growing larger in New Horizons' forward view, beginning to develop distinct personalities. A version of recent New Horizons photos processed by Björn Jónsson reveals an enigmatic dark line. Our maps of Pluto's surface are now as good as our maps of Mars and Venus, circa 1900!

Emily Lakdawalla

Last week the New Horizons mission released a few new processed versions of their latest and greatest images of Pluto. They're the best images of Pluto that Earth has ever seen, but they're still a long way from what New Horizons will be able to show us, six weeks from now.

Marc Rayman

Dawn's Chief Engineer and Mission Director Marc Rayman gives an update as the spacecraft's orbit takes it even closer to the dwarf planet Ceres.

Emily Lakdawalla

Fantastic new images of Ceres continue to spill out of the Dawn mission, and armchair scientists all over the world are zooming into them, exploring them, and trying to solve the puzzles that they contain.

Paul Schenk

Two months. Eight and half weeks. 58 days. It's a concept almost too difficult to grasp: we are on Pluto's doorstep.

Emily Lakdawalla

A recent Rosetta image has revealed a good part of the comet's previously hidden southern terrain to the public for the first time.

Emily Lakdawalla

New Horizons has now spotted every one of Pluto's satellites...all the ones we know about, that is.

Jason Dworkin

The nature of the origin of life is a topic that has engaged people since ancient times. The samples to be collected by OSIRIS-REx, returned to the Earth in 2023 and archived for decades beyond that, may indeed hide the secrets to the origin of life.

Emily Lakdawalla

Now that Dawn is in its science orbit at Ceres, the mission has been releasing new images every weekday!

Marc Rayman

Dawn Mission Director and Chief Engineer Marc Rayman gives a status update on the mission, having finally arrived at dwarf planet Ceres.

Emily Lakdawalla

Today the New Horizons team released a new animation of images taken on approach to Pluto. The animation clearly shows how Pluto wobbles around the Pluto-Charon barycenter. It also shows something more exciting to the scientists: variations in brightness across the surface of Pluto. They also began releasing raw images to the Internet.