Rosetta is currently chasing down Comet 67P/Churyumov-Gerasimenko, where it will become the first space mission to rendezvous with a comet, the first to attempt a landing on a comet’s surface and the first to follow a comet as it swings around the Sun.
But for 31 months it has been radio silent. It is powered by solar energy and was placed into deep space slumber in June of 2011 as it cruised out to a distance of nearly 500 million miles from Sol, beyond the orbit of Jupiter. Now it is only about 400 million miles from the Sun and has enough solar energy to power back up.
To everyone's relief, it did.
Since its launch in 2004, Rosetta has made three flybys of Earth and one of Mars to help it on course to its rendezvous with 67P/Churyumov-Gerasimenko, encountering asteroids Steins and Lutetia along the way.
It's still 5.5 million miles from its target but Rosetta’s pre-programmed internal ‘alarm clock’ woke up the spacecraft. After warming up its key navigation instruments, coming out of a stabilizing spin, and aiming its main radio antenna at Earth, Rosetta sent a signal to let mission operators know it had survived the most distant part of its journey.
The signal was received by NASA’s Goldstone ground station in California at 18:18 GMT/ 19:18 CET, during the first window of opportunity the spacecraft had to communicate with Earth. It was immediately confirmed in ESA’s space operations centre in Darmstadt and the successful wake-up announced via the @ESA_Rosetta twitter account, which tweeted: “Hello, World!”
“We have our comet-chaser back,” says Alvaro Giménez, ESA’s Director of Science and Robotic Exploration. “With Rosetta, we will take comet exploration to a new level. This incredible mission continues our history of ‘firsts’ at comets, building on the technological and scientific achievements of our first deep space mission Giotto, which returned the first close-up images of a comet nucleus as it flew past Halley in 1986.”
Happiness. Credit: ESA/Jürgen Mai
Comets are considered the primitive building blocks of the Solar System and likely helped to ‘seed’ Earth with water, perhaps even the ingredients for life. But many fundamental questions about these enigmatic objects remain, and through its comprehensive, in situ study of Comet 67P/Churyumov-Gerasimenko, Rosetta aims to unlock the secrets contained within.
“All other comet missions have been flybys, capturing fleeting moments in the life of these icy treasure chests,” says Matt Taylor, ESA’s Rosetta project scientist. “With Rosetta, we will track the evolution of a comet on a daily basis and for over a year, giving us a unique insight into a comet’s behavior and ultimately helping us to decipher their role in the formation of the Solar System.”
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Prevent Alzheimer's Disease By Drinking Beer?
- Acceptance Of Evolution Is Far Higher Than Acceptance Of Other Biology
- Hardwired For Miscommunication? Why Women Think Sex When Men Just Want To Be Friends
- Planck on BICEP2 "It turns out that the part of the dust had been significantly underestimated."
- Extended Telomeres Slow Cell Aging
- Optically Getting To The Same Side: How To Generating Möbius Strips Of Light
- Science 2.0: Can Large-Scale Analytics Predict Major Societal Events?
- "I had no idea, which means I bet most of the audience doesn't either. We just assume it is as simple..."
- "Scientists in the private sector are as diverse and evenly represented as America is. 'Science..."
- "Was statistical back testing done? That is, did EMBERS detect power laws, e.g., frequency or size..."
- "it is not just 'government-funded scientists who vote Democrat. it is almost all scientists, and..."
- "I am thinking about it since I need to start doing female rodent studies. The major issue..."