Rosetta On Course To Achieve Historic Mission

  • Playlist
  • Download
  • Embed
    <iframe src="" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Scientists are celebrating after receiving a signal from a spacecraft on a long journey. The Rosetta is studying a comet in more detail than ever before. The spacecraft's call home means the robot has successfully awakened itself from a long hibernation.


Scientists are celebrating after receiving a signal from a spacecraft on a very long journey. The Rosetta is traveling through the heavens to study a comet in more detail than ever before. As NPR's Rob Stein reports, the Rosetta spacecraft's call home meant the robot onboard had successfully awakened itself from a long hibernation, and is now on course to achieve its historic mission.

ROB STEIN, BYLINE: The European Space Agency launched Rosetta nearly 10 years ago. The 6,400-ton, unmanned spacecraft's goal was ambitious: to orbit and study a comet as it hurtles through space. [POST-BROADCAST CORRECTION: The spacecraft weights 6,400 pounds, not tons.] One of the mission's directors, Gerhard Schwehm, says scientists think that could provide exciting clues to how Earth and other planets formed and even, possibly, how life began.

GERHARD SCHWEHM: Comets are the messengers that bring material that we had at the beginning of the evolution of the planetary system.

STEIN: But Rosetta had to take a long, circuitous journey to catch up to the comet. The trip would take Rosetta around the sun almost four times, through the asteroid belt twice, and skittering close to Mars once and the Earth three times. To preserve power, Rosetta was placed into hibernation, in 2011. Finally, on Monday, Rosetta was programmed to wake itself up and call home. Scientists around the world waited anxiously for Rosetta's signal. Tension mounted when the window opened to receive the transmission and there was nothing, just silence. But finally, the signal arrived, and a celebration erupted at mission control in Germany.


STEIN: Rosetta now continues its journey to rendezvous with a comet in August. Rosetta will even, hopefully, do something never tried before: Drop a small probe to land on the comet in November, to drill into the surface. French scientist Jean-Pierre Bibring says that should yield a wealth of data.

JEAN-PIERRE BIBRING: We've been to comets far away. We know what a comet is. We never landed. And we are absolutely convinced that when we do that, then the entire reality of a comet will finally be revealed.

STEIN: And that will - hopefully - reveal many of the secrets comets carry with them as they journey through space.

Rob Stein, NPR News.


Copyright © 2014 NPR. All rights reserved. Visit our website terms of use and permissions pages at for further information.

NPR transcripts are created on a rush deadline by a contractor for NPR, and accuracy and availability may vary. This text may not be in its final form and may be updated or revised in the future. Please be aware that the authoritative record of NPR’s programming is the audio.

Correction Jan. 21, 2014

In this story, we say the Rosetta spacecraft weighs 6,400 tons. We should have said 6,400 pounds.



Please keep your community civil. All comments must follow the Community rules and terms of use, and will be moderated prior to posting. NPR reserves the right to use the comments we receive, in whole or in part, and to use the commenter's name and location, in any medium. See also the Terms of Use, Privacy Policy and Community FAQ.

NPR thanks our sponsors

Become an NPR sponsor

Support comes from