Video: Huygens' descent to Titan

January 13, 2017 by Nancy Atkinson, Universe Today
Video: Huygens' descent to Titan
The view of Titan from the descending Huygens spacecraft on January 14, 2005. Credit: ESA/NASA/JPL/University of Arizona.

On December 25, 2004, the piggybacking Huygens probe was released from the 'mothership' Cassini spacecraft and it arrived at Titan on January 14, 2005. The probe began transmitting data to Cassini four minutes into its descent through Titan's murky atmosphere, snapping photos and taking data all the while. Then it touched down, the first time a probe had landed on an extraterrestrial world in the outer Solar System.

JPL has released a re-mix of the data and images gathered by Huygens 12 years ago in a beautiful new . This is the last opportunity to celebrate the success of Huygens before Cassini ends its mission in September of 2017.

Watch as the incredible view of Titan's surface comes into view, with mountains, a system of river channels and a possible lakebed.

After a two-and-a-half-hour descent, the metallic, saucer-shaped spacecraft came to rest with a thud on a dark floodplain covered in cobbles of water ice, in temperatures hundreds of degrees below freezing.

Huygens had to quickly collect and transmit all the images and data it could because shortly after landing, Cassini would drop below the local horizon, "cutting off its link to the home world and silencing its voice forever."

How much of this video is actual images and data vs computer graphics?

The video will load shortly

Of course, the clips at the beginning and end of the video are obviously animations of the probe and orbiter. However, the slow descending 1st-person point-of-view video is made using actual images from Huygens. But Huygens did not take a continuous movie sequence, so a lot of work was done by the team that operated Huygens' optical imager, the Descent Imager/Spectral Radiometer (DISR), to enhance, colorize, and re-project the images into a variety of formats.

The view of the cobblestones and the parachute shadow near the end of the video is also created from real landing data, but was made in a different way from the rest of the descent video, because Huygens' cameras did not actually image the parachute shadow. However, the upward looking infrared spectrometer took a measurement of the sky every couple of seconds, recording a darkening and then brightening to the unobstructed sky. The DISR team calculated from this the accurate speed and direction of the parachute, and of its shadow to create a very realistic video based on the data.

If you're a data geek, there are some great videos of Huygens' data by the University of Arizona Lunar and Planetary Laboratory team, such as this one:

The video will load shortly

The movie shows the operation of the DISR camera during the descent onto Titan. The almost 4-hour long operation

of DISR is shown in less than five minutes in 40 times actual sped up to landing and 100 times actual speed thereafter.

Erich Karkoschka from the UA team explained what all the sounds in the video are. "All parts of DISR worked together as programmed, creating a harmony," he said. Here's the full explanation:

Sound was added to mark various events. The left speaker follows the motion of Huygens. The pitch of the tone indicates the rotational speed. Vibrato indicates vibration of the parachute. Little clicks indicate the clocking of the rotation counter. Noise corresponds to heating of the heat shield, to parachute deployments, to the heat shield release, to the jettison of the DISR cover, and to touch down.

The sound in the right speaker follows DISR data. The pitch of the continuous tone goes with the signal strength. The 13 different chime tones indicate activity of the 13 components of DISR. The counters at the top and bottom of the list get the high and low notes, respectively.

Explore further: Huygens: 'Ground truth' from an alien moon—2005 historic descent to Titan revisited

Related Stories

Image: Fish-eye view of Saturn's moon Titan

January 15, 2016

At first glance, this scene may look like a reptilian eye or a textured splash of orange paint, but it is actually a fish-eye view of Saturn's moon Titan. It was acquired at a height of about 5 km as ESA's Huygens probe, ...

Landing on Titan: The new movies

May 4, 2006

Scientists at the University of Arizona Lunar and Planetary Laboratory (LPL) have made two new movies of the Huygens probe's landing on Saturn's giant moon, Titan, on Jan. 14, 2005.

Parachuting to Titan: Update 1

January 14, 2005

Radio astronomers confirm Huygens entry in the atmosphere of Titan. The Robert C. Byrd Green Bank Telescope (GBT) in West Virginia, USA, a part of the global network of radio telescopes involved in tracking the Huygens Titan ...

Huygens lands with a splat

January 18, 2005

Although Huygens landed on Titan's surface on 14 January, activity at ESA's European Space Operations Centre in Darmstadt, Germany, continues at a furious pace. Scientists are still working to refine the exact location of ...

Huygens mission: Ten years at Titan

January 14, 2015

Celebrating the 10th anniversary of the pioneering Huygens mission to Saturn's moon Titan, the first successful landing on an outer Solar System world.

Recommended for you

Discovered: Fast-growing galaxies from early universe

May 24, 2017

A team of astronomers including Carnegie's Eduardo Bañados and led by Roberto Decarli of the Max Planck Institute for Astronomy has discovered a new kind of galaxy which, although extremely old—formed less than a billion ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.